Calculators
Physics calculators
113 tools
Kinematics, energy, fluids, thermodynamics, waves, and optics.
Browse by topic
Family pages are registry-driven. Calculator URLs stay /calc/physics/… Tools may appear in more than one topic.
- Kinematics Displacement, velocity, acceleration, SUVAT, free fall, and projectiles. · 7 tools
- Dynamics Force, friction, momentum, impulse, torque, work, and circular motion. · 7 tools
- Fluid Mechanics Internal pipe, open channel, flow meters, pumps, and dimensionless numbers. · 66 tools
- Thermodynamics Ideal gas, heat transfer, thermal resistance, radiation, and formula-first thermal expansion. · 8 tools
- Units Force, pressure, energy, power, speed, temperature, frequency, and magnetic-field unit pairs. · 10 tools
Popular
Featured tools from the Family registry.
- Acceleration Calculator Solve constant acceleration a=(v−u)/t. Runs locally in your browser.
- Velocity Calculator Solve average velocity v=s/t for v, s, or t. Runs locally in your browser.
- Displacement Calculator Δx = x − x₀. Runs locally in your browser.
- SUVAT Calculator Constant-acceleration kinematics: solve v, s, a, or t (SUVAT). Runs locally in your browser.
- Force Calculator (F=ma) Solve Newton’s second law for force, mass, or acceleration. Runs locally in your browser.
- Friction Calculator F = μ N. Runs locally in your browser.
- Momentum Calculator Solve linear momentum p=mv for p, m, or v. Runs locally in your browser.
- Torque Calculator Compute torque τ = r F sinθ. Runs locally in your browser.
Kinematics
Displacement, velocity, acceleration, SUVAT, free fall, and projectiles.
- Acceleration Calculator Solve constant acceleration a=(v−u)/t. Runs locally in your browser.
- Displacement Calculator Δx = x − x₀. Runs locally in your browser.
- Free Fall Calculator Free-fall distance, speed, or time under constant g (optional initial velocity). Runs locally in your browser.
- Projectile Motion Calculator Compute range, apex height, and flight time for flat-ground projectile motion (no drag). Runs locally in your browser.
- Projectile Trajectory Calculator R = v₀² sin(2θ) / g. Runs locally in your browser.
- SUVAT Calculator Constant-acceleration kinematics: solve v, s, a, or t (SUVAT). Runs locally in your browser.
- Velocity Calculator Solve average velocity v=s/t for v, s, or t. Runs locally in your browser.
Dynamics
Force, friction, momentum, impulse, torque, work, and circular motion.
- Centripetal Force Calculator F = m v² / r. Runs locally in your browser.
- Force Calculator (F=ma) Solve Newton’s second law for force, mass, or acceleration. Runs locally in your browser.
- Friction Calculator F = μ N. Runs locally in your browser.
- Impulse Calculator J = F Δt = Δp. Runs locally in your browser.
- Momentum Calculator Solve linear momentum p=mv for p, m, or v. Runs locally in your browser.
- Torque Calculator Compute torque τ = r F sinθ. Runs locally in your browser.
- Work and Power Calculator Compute work W=Fs cosθ and power P=W/t or Fv. Runs locally in your browser.
Energy
Kinetic energy, potential energy, and efficiency. Family URL waits until five Entries.
Statics (Physics)
Elastic modulus and remaining Physics-hosted statics tools.
Fluid Mechanics
Internal pipe, open channel, flow meters, pumps, and dimensionless numbers.
- Alternate Depth Calculator Compute both rectangular depths at the same specific energy from E, Q, and width b. Runs locally. Not specific energy from y+v; not specific force M; not hydraulic jump y2; not critical depth yc as the product.
- Bernoulli Equation Calculator Incompressible Bernoulli along a streamline: solve P2, v2, or h2. Runs locally in your browser.
- Broad-Crested Weir Calculator Compute rectangular broad-crested weir discharge Q = C_d (2/3)^{3/2} b √g H^{3/2}. Default C_d=0.85. Runs locally. Not a thin-plate weir, not Manning, not Q=Av, and not an orifice.
- Cavitation Number Calculator Compute the cavitation number σ = (p − p_v) / (½ ρ v²). Runs locally. Not NPSH, not Thoma NPSH/H, not Weber, and not Euler Eu=Δp/(ρ v²).
- Chezy Formula Calculator Compute open-channel mean velocity V = C √(R S). Runs locally. Not Manning n, not Q=Av, not Hazen–Williams, and not Darcy.
- Colebrook Friction Factor Calculator Solve the Colebrook–White equation for Darcy friction factor f from Re and ε/D. Turbulent pipes Re≥4000. Runs locally. Not laminar 64/Re and not a Moody-chart lookup.
- Concentric Reducer Calculator Compute concentric-reducer loss h = K v₂² / (2g) with K = 0.5 (1 − A₂/A₁) referenced to the downstream speed. Runs locally. Not sudden expansion, not gradual contraction α, not vena-contracta C_c, not catalog K, and not Q=Av.
- Critical Depth Calculator Compute rectangular critical depth yc = (q²/g)^{1/3}. Runs locally. Not a Froude wrap, not specific energy, not a hydraulic jump, and not Q=Av.
Thermodynamics
Ideal gas, heat transfer, thermal resistance, radiation, and formula-first thermal expansion.
- Boyle's Law Calculator P₁V₁ = P₂V₂. Runs locally in your browser.
- Charles's Law Calculator V₁/T₁ = V₂/T₂. Runs locally in your browser.
- Composite Wall Calculator Compute plane composite-wall resistance from a layer list. R_i = L_i/(k_i A), optional films 1/(h A), R = R_in + ΣR_i + R_out. Optional Q=ΔT/R. Runs locally. Not Fourier/Newton Q, not a lumped R-network, and not heatsink θ.
- Heat Transfer Calculator Compute conductive Q=kAΔT/L or convective Q=hAΔT heat transfer rate. Runs locally in your browser.
- Ideal Gas Law Calculator Solve the ideal gas law for P, V, n, or T with SI units. Runs locally in your browser.
- Specific Heat Capacity Calculator Solve Q = m c ΔT for heat, mass, specific heat, or temperature change. Runs locally in your browser.
- Stefan–Boltzmann Calculator Compute net gray-body flux q = εσ(Th⁴−Tc⁴) and optional Q = A·q. σ from CODATA 2018. Runs locally. Not Fourier/Newton heat-transfer and not a view-factor solver.
- Thermal Resistance Calculator Compute lumped thermal resistance. Conduction R=L/(k A), convection R=1/(h A), series ΣR, parallel 1/R=Σ1/R_i. Optional Q=ΔT/R. Runs locally. Not Fourier/Newton Q, not heatsink θ, and not steam.
Electromagnetism
Coulomb, electric field, magnetic field, and Faraday. Family URL waits until five Entries.
- Coulomb's Law Calculator Compute electrostatic force F = k·|q1·q2|/r² between point charges. Runs locally in your browser.
- Electric Field Calculator E = k|Q|/r². Runs locally in your browser.
- Faraday's Law Calculator ε = N |ΔΦ| / Δt. Runs locally in your browser.
- Magnetic Field Calculator B = μ₀ I / (2π r). Runs locally in your browser.
Optics
Snell's law and the lensmaker equation. Family URL waits until five Entries.
Acoustics
Sound level and the Doppler effect. Family URL waits until five Entries.
Modern Physics
Half-life and time dilation. Family URL waits until five Entries.
Units
Force, pressure, energy, power, speed, temperature, frequency, and magnetic-field unit pairs.
- Binary to Hex Converter Convert unsigned integers between binary and hexadecimal. Runs locally in your browser.
- Celsius to Kelvin Converter Convert between Celsius and Kelvin with hard absolute-zero checks. Runs locally in your browser.
- Hz to Rad/s Converter Convert between hertz and radians per second with ω = 2πf. Runs locally in your browser.
- Joule to eV Converter Convert energy between joules and electronvolts (exact SI factor). Runs locally in your browser.
- kWh to Joules Converter Convert energy between kilowatt-hours and joules (1 kWh = 3.6 MJ). Runs locally in your browser.
- m/s to km/h Converter Convert speed between metres per second and kilometres per hour (×3.6). Runs locally in your browser.
- Newton to Lbf Converter Convert force between newtons and pound-force (1 lbf = 4.4482216152605 N). Runs locally in your browser.
- PSI to Bar Converter Convert between pound-force per square inch and bar. Runs locally in your browser.
More Physics calculators
Not yet placed in a published Family.
All Physics calculators
Full list for search and crawl.
- Acceleration Calculator Solve constant acceleration a=(v−u)/t. Runs locally in your browser.
- Alternate Depth Calculator Compute both rectangular depths at the same specific energy from E, Q, and width b. Runs locally. Not specific energy from y+v; not specific force M; not hydraulic jump y2; not critical depth yc as the product.
- Bernoulli Equation Calculator Incompressible Bernoulli along a streamline: solve P2, v2, or h2. Runs locally in your browser.
- Binary to Hex Converter Convert unsigned integers between binary and hexadecimal. Runs locally in your browser.
- Boyle's Law Calculator P₁V₁ = P₂V₂. Runs locally in your browser.
- Broad-Crested Weir Calculator Compute rectangular broad-crested weir discharge Q = C_d (2/3)^{3/2} b √g H^{3/2}. Default C_d=0.85. Runs locally. Not a thin-plate weir, not Manning, not Q=Av, and not an orifice.
- Cavitation Number Calculator Compute the cavitation number σ = (p − p_v) / (½ ρ v²). Runs locally. Not NPSH, not Thoma NPSH/H, not Weber, and not Euler Eu=Δp/(ρ v²).
- Celsius to Kelvin Converter Convert between Celsius and Kelvin with hard absolute-zero checks. Runs locally in your browser.
- Centripetal Force Calculator F = m v² / r. Runs locally in your browser.
- Charles's Law Calculator V₁/T₁ = V₂/T₂. Runs locally in your browser.
- Chezy Formula Calculator Compute open-channel mean velocity V = C √(R S). Runs locally. Not Manning n, not Q=Av, not Hazen–Williams, and not Darcy.
- Colebrook Friction Factor Calculator Solve the Colebrook–White equation for Darcy friction factor f from Re and ε/D. Turbulent pipes Re≥4000. Runs locally. Not laminar 64/Re and not a Moody-chart lookup.
- Composite Wall Calculator Compute plane composite-wall resistance from a layer list. R_i = L_i/(k_i A), optional films 1/(h A), R = R_in + ΣR_i + R_out. Optional Q=ΔT/R. Runs locally. Not Fourier/Newton Q, not a lumped R-network, and not heatsink θ.
- Concentric Reducer Calculator Compute concentric-reducer loss h = K v₂² / (2g) with K = 0.5 (1 − A₂/A₁) referenced to the downstream speed. Runs locally. Not sudden expansion, not gradual contraction α, not vena-contracta C_c, not catalog K, and not Q=Av.
- Coulomb's Law Calculator Compute electrostatic force F = k·|q1·q2|/r² between point charges. Runs locally in your browser.
- Critical Depth Calculator Compute rectangular critical depth yc = (q²/g)^{1/3}. Runs locally. Not a Froude wrap, not specific energy, not a hydraulic jump, and not Q=Av.
- Critical Slope Calculator Compute rectangular critical bed slope Sc such that yn=yc using SI Manning at y=yc. Runs locally. Not Manning A,R; not normal-depth yn; not critical-depth yc as the product; not Chezy; not Q=Av.
- Cutthroat Flume Calculator Compute Skogerboe cutthroat flume free-flow discharge from throat width W, independent flume length L_f, and gage head Ha. Runs locally. Not a Parshall flume, not a thin-plate weir, not a broad-crested weir, not Manning, not Q=Av, and not an orifice.
- Darcy–Weisbach Calculator Compute pipe head loss hf = f L v²/(2 g D) and Δp = ρ g hf from a given Darcy friction factor. Runs locally. Does not solve Colebrook for f.
- Displacement Calculator Δx = x − x₀. Runs locally in your browser.
- Doppler Effect Calculator f' = f (v±vo)/(v±vs). Runs locally in your browser.
- Drag Force Calculator Fd = ½ ρ v² Cd A. Runs locally in your browser.
- Drowned Sluice Calculator Compute Swamee 1992 drowned undershot sluice discharge from opening a, width b, upstream depth y1, and downstream depth y2. Runs locally. C_d is reported, not an input. Not free-flow sluice, not a Villemonte weir, not a tank orifice, not Manning, and not Q=Av.
- Efficiency Calculator Power efficiency η=Pout/Pin as fraction and percent. Runs locally in your browser.
- Elbow Flow Meter Calculator Compute 90° elbow-tap discharge from inner/outer Δp. C=√((R/D)/2). Runs locally. Not pipe-bend K, not Pitot C=1, not venturi, not ISO 5167-6 wedge, not given C_d.
- Electric Field Calculator E = k|Q|/r². Runs locally in your browser.
- Faraday's Law Calculator ε = N |ΔΦ| / Δt. Runs locally in your browser.
- Flow Rate Calculator Volumetric flow Q=A·v (or from pipe diameter). Runs locally in your browser.
- Force Calculator (F=ma) Solve Newton’s second law for force, mass, or acceleration. Runs locally in your browser.
- Free Fall Calculator Free-fall distance, speed, or time under constant g (optional initial velocity). Runs locally in your browser.
- Friction Calculator F = μ N. Runs locally in your browser.
- Froude Number Calculator Compute the open-channel Froude number Fr = v / √(g L). Default g=9.80665 m/s². Runs locally. Not Reynolds, not Manning, not Chezy, and not Q=Av.
- Gradual Contraction Calculator Compute conical-contraction loss h = K v2² / (2g) with K = 0.5 sin(α) (1 − v1/v2). α is the wall half-angle. Runs locally. Not sudden contraction, not gradual expansion, not minor-loss K as an input, and not Q=Av.
- Gradual Expansion Calculator Compute conical-diffuser loss h = k (v1 − v2)² / (2g) with k = 2.6 sin(α). α is the wall half-angle. Runs locally. Not sudden expansion, not minor-loss K as an input, and not Q=Av.
- Hagen–Poiseuille Calculator Compute laminar circular-pipe flow Q = π Δp D⁴ / (128 μ L). Runs locally. Not Darcy f, not Colebrook, and not Q=Av.
- Half-Life Calculator Radioactive decay with N=N₀·2^(−t/T½). Runs locally in your browser.
- Hazen–Williams Calculator Compute SI Hazen–Williams head loss hf = 10.67 L Q^{1.852} / (C^{1.852} D^{4.87}) for a circular water pipe. Runs locally. Not Darcy–Weisbach, not Colebrook, and not Manning.
- Heat Transfer Calculator Compute conductive Q=kAΔT/L or convective Q=hAΔT heat transfer rate. Runs locally in your browser.
- Hydraulic Diameter Calculator Compute hydraulic diameter D_h=4A/P_w for a general section, a full circular pipe, a closed rectangular duct, or an annulus. Runs locally. Not Q=Av, not Manning, and not Darcy.
- Hydraulic Jump Calculator Compute rectangular sequent depths y₂/y₁ = (√(1+8 Fr₁²) − 1)/2. Fr₁ > 1. Runs locally. Not a Froude wrap, not Manning, not a weir, and not Q=Av.
- Hz to Rad/s Converter Convert between hertz and radians per second with ω = 2πf. Runs locally in your browser.
- Ideal Gas Law Calculator Solve the ideal gas law for P, V, n, or T with SI units. Runs locally in your browser.
- Impulse Calculator J = F Δt = Δp. Runs locally in your browser.
- ISO 5167 Cone Meter Calculator Compute ISO 5167-5 uncalibrated cone-meter discharge. β=√(1−(d_c/D)²). Runs locally. Not ISA 1932, not RHG orifice, not ISO 5167-4 type C, not long-radius, not given C_d.
- ISO 5167 Long-Radius Nozzle Calculator Compute ISO 5167-3 long-radius nozzle discharge with C from β. Runs locally. Not ISA 1932, not given C_d=0.98, not RHG orifice, not ISO 5167-4 type C, not Q=Av.
- ISO 5167 Nozzle Calculator Compute ISO 5167-3 ISA 1932 nozzle discharge with C from β and Re_D, not a given C_d. Runs locally. Not a venturi wrap with C_d=0.98, not orifice C_d=0.61, not Q=Av, and not Darcy.
- ISO 5167 Orifice Plate Calculator Compute ISO 5167-2 orifice-plate discharge with Reader–Harris/Gallagher C from β, Re_D, and tapping. Runs locally. Not tank orifice C_d A √(2gH), not given C_d=0.61, not ISA 1932 nozzle, not venturi C_d=0.98.
- ISO 5167 Venturi Tube Calculator Compute ISO 5167-4 classical Venturi-tube discharge with C from convergent type. Runs locally. Not given C_d=0.98, not ISA 1932 nozzle, not RHG orifice, not Q=Av.
- ISO 5167 Wedge Meter Calculator Compute ISO 5167-6 uncalibrated wedge-meter discharge. β from circular-segment h/D. Runs locally. Not cone C=0.82, not ISA 1932, not RHG orifice, not ISO 5167-4 type C, not given C_d.
- Joule to eV Converter Convert energy between joules and electronvolts (exact SI factor). Runs locally in your browser.
- Kinetic Energy Calculator KE = ½ m v². Runs locally in your browser.
- kWh to Joules Converter Convert energy between kilowatt-hours and joules (1 kWh = 3.6 MJ). Runs locally in your browser.
- Lens Maker Calculator 1/f = (n−1)(1/R1 − 1/R2). Runs locally in your browser.
- Linear Thermal Expansion Calculator Calculate free linear expansion from length, temperature change, and a user-supplied coefficient. Solve ΔL, final length, α, or ΔT without a material database.
- m/s to km/h Converter Convert speed between metres per second and kilometres per hour (×3.6). Runs locally in your browser.
- Magnetic Field Calculator B = μ₀ I / (2π r). Runs locally in your browser.
- Manning Formula Calculator Compute SI Manning discharge Q = (1/n) A R^{2/3} S^{1/2}. Runs locally. Not Q=Av, not Darcy–Weisbach, and not a weir.
- Minor Loss Calculator Compute fitting minor loss h_m = K v²/(2g). Optional Δp = ρ g h_m. Runs locally. Not Darcy–Weisbach, not Hazen–Williams, and not an orifice.
- Mitered Bend Calculator Compute sharp mitered-elbow loss h = K v² / (2g) with K = n [sin²(δ/2) + 2 sin⁴(δ/2)], δ = θ/n. Runs locally. Not circular-arc R/D, not minor-loss K as an input, not Crane f_T, and not Q=Av.
- Momentum Calculator Solve linear momentum p=mv for p, m, or v. Runs locally in your browser.
- Newton to Lbf Converter Convert force between newtons and pound-force (1 lbf = 4.4482216152605 N). Runs locally in your browser.
- Normal Depth Calculator Compute rectangular uniform-flow normal depth yn from SI Manning with A=b yn and R=b yn/(b+2 yn). Runs locally. Not Manning A,R; not critical depth; not specific energy; not Chezy; not Q=Av.
- NPSH Calculator Compute NPSH available from an open tank or a suction flange, and compare with manufacturer NPSHr. Runs locally. Not pump power, not an orifice, not a weir, not Q=Av, and not Darcy.
- Ogee Spillway Calculator Compute USBR high-overflow ogee spillway discharge from crest length L, head H, and design head Hd. Runs locally. C is 3.98 (H/Hd)^{0.12}, not an input. Not a thin-plate weir, not broad-crested, not a sluice, not Manning, and not Q=Av.
- Orifice Discharge Calculator Compute sharp-edged orifice discharge. Tank Q=C_d A √(2gH). Meter Q=C_d E A_t √(2Δp/ρ) with E=1/√(1−β⁴). Runs locally. Not a weir, not Q=Av, not Darcy, and not Manning.
- Parshall Flume Calculator Compute USBR 1–8 ft Parshall flume free-flow discharge from throat width W and gage head Ha. Runs locally. Not a thin-plate weir, not a broad-crested weir, not Manning, not Q=Av, and not an orifice.
- Pipe Bend Calculator Compute circular-arc bend loss h = K v² / (2g) with K = 0.21 (θ/90)/√(R/D). Runs locally. Not minor-loss K as an input, not mitered, not Darcy, and not Q=Av.
- Pipe Cross Calculator Compute equal-area sharp 90° four-way cross loss h = K v_c² / (2g) from dividing or combining flow and branch or through split with equal opposite laterals. Runs locally. Not a 90° tee, not a wye, not catalog K, and not Q=Av.
- Pipe Entrance Calculator Compute pipe-inlet loss h = K v² / (2g) from geometry: flush K=0.5, reentrant K=0.8, rounded K=0.5/[1+36(rᵢ/D)^1.2]. Runs locally. Not catalog K, not circular-arc R/D, not mitered n, and not Q=Av.
- Pipe Exit Calculator Compute pipe-exit loss h = K v² / (2g) with K=1 into a large reservoir. Runs locally. Not catalog K, not inlet geometry, not sudden expansion (v1−v2)², and not Q=Av.
- Pipe Period Calculator Compute the water-hammer pipe period T = 2L/c. Runs locally. Not Joukowsky Δp, not Korteweg–Hall c from K/D/e/E, and not Darcy f.
- Pipe Tee Calculator Compute equal-area sharp 90° T loss h = K v_c² / (2g) from dividing or combining flow and branch or run split. Runs locally. Not catalog K, not a bend, not pipe-entrance, not pipe-exit, and not Q=Av.
- Pipe Wye Calculator Compute equal-area sharp wye loss h = K v_c² / (2g) from branch angle α in (0, 90°), dividing or combining flow, and branch or run split. Runs locally. Not a 90° tee, not catalog K, not a bend, and not Q=Av.
- Pitot Tube Calculator Compute incompressible pitot-static speed v = C √(2 Δp / ρ). Default C=1. Runs locally. Not a venturi, not an orifice, not Q=Av, and not two-station Bernoulli.
- Potential Energy Calculator PE = m g h. Runs locally in your browser.
- Projectile Motion Calculator Compute range, apex height, and flight time for flat-ground projectile motion (no drag). Runs locally in your browser.
- Projectile Trajectory Calculator R = v₀² sin(2θ) / g. Runs locally in your browser.
- PSI to Bar Converter Convert between pound-force per square inch and bar. Runs locally in your browser.
- Pump Power Calculator Compute incompressible pump power P=ρgQH/η and affinity-law scaling Q∝ND, H∝N²D², P∝N³D³. Runs locally. Not an orifice, not a weir, not Q=Av, and not Darcy.
- Reynolds Number Calculator Compute Re = ρvL/μ (or vL/ν) with laminar/turbulent guidance for pipes. Runs locally in your browser.
- Side Weir Calculator Compute Borghei 1999 sharp-crested rectangular side-weir discharge from channel width B, weir length L, upstream depth y1, sill p, and approach Q1. Runs locally. C_d is 0.71−0.41 Fr₁−0.22(p/y1), not an input. Not a frontal thin-plate weir, not an ogee, not a sluice, not Manning, and not Q=Av.
- Sluice Gate Calculator Compute free-flow undershot sluice discharge from gate opening a, width b, and upstream depth y1. Runs locally. C_d is Swamee 1992, not an input. Not a tank orifice, not a weir, not a flume, not Manning, and not Q=Av.
- Snell's Law Calculator n₁ sinθ₁ = n₂ sinθ₂. Runs locally in your browser.
- Sound Level Calculator L = 10 log₁₀(I/I₀). Runs locally in your browser.
- Specific Energy Calculator Compute open-channel specific energy E = y + v²/(2g). Runs locally. Not a Froude wrap, not a hydraulic jump, and not Q=Av.
- Specific Force Calculator Compute rectangular specific force M = Q²/(gA) + A ȳ with ȳ = y/2. Runs locally. Not hydraulic jump y2; not specific energy E; not Froude as the product; not Manning; not Q=Av.
- Specific Heat Capacity Calculator Solve Q = m c ΔT for heat, mass, specific heat, or temperature change. Runs locally in your browser.
- Stefan–Boltzmann Calculator Compute net gray-body flux q = εσ(Th⁴−Tc⁴) and optional Q = A·q. σ from CODATA 2018. Runs locally. Not Fourier/Newton heat-transfer and not a view-factor solver.
- Submerged Weir Calculator Compute Villemonte rectangular submerged-weir discharge from crest L, upstream head H1, and downstream head H2. Qs=Qf [1−(H2/H1)^{1.5}]^{0.385}. Runs locally. Not free-flow thin-plate H only, not an ogee, not a side weir, not Manning, and not Q=Av.
- Sudden Contraction Calculator Compute vena-contracta sudden-contraction loss h = (1/C_c − 1)² v2² / (2g). Default C_c=0.62. Runs locally. Not sudden expansion, not minor-loss K as an input, not an orifice, and not Q=Av.
- Sudden Expansion Calculator Compute Borda–Carnot sudden-expansion loss h = (v1 − v2)² / (2g). Runs locally. Not minor-loss K as an input, not Darcy, not an orifice, and not Q=Av.
- SUVAT Calculator Constant-acceleration kinematics: solve v, s, a, or t (SUVAT). Runs locally in your browser.
- Tesla to Gauss Converter Convert magnetic flux density between tesla and gauss (1 T = 10000 G). Runs locally in your browser.
- Thermal Resistance Calculator Compute lumped thermal resistance. Conduction R=L/(k A), convection R=1/(h A), series ΣR, parallel 1/R=Σ1/R_i. Optional Q=ΔT/R. Runs locally. Not Fourier/Newton Q, not heatsink θ, and not steam.
- Time Dilation Calculator Δt = γ Δτ. Runs locally in your browser.
- Torque Calculator Compute torque τ = r F sinθ. Runs locally in your browser.
- Trapezoidal Alternate Depth Calculator Compute both trapezoid depths at the same specific energy from E, Q, b, and z with A=(b+z y)y. Runs locally. Not rectangular alternate depth; not trapezoid E; not trapezoid yc; not trapezoid yn.
- Trapezoidal Critical Depth Calculator Compute trapezoid critical depth from Q, bottom width b, and side slope z. Runs locally. Not rectangular yc=(q²/g)^{1/3}, not normal depth, and not Q=Av.
- Trapezoidal Hydraulic Jump Calculator Compute trapezoid sequent depths from specific force on A=(b+z y)y. Runs locally. Not rectangular Bélanger y2/y1=(√(1+8Fr₁²)−1)/2; not trapezoid alternate E-pair; not trapezoid yc; not trapezoid yn.
- Trapezoidal Normal Depth Calculator Compute trapezoid uniform-flow yn from SI Manning with A=(b+z y)y and P=b+2 y √(1+z²). Runs locally. Not rectangular yn, not trapezoid yc, not Manning A,R, not Chezy, not Q=Av.
- Trapezoidal Specific Energy Calculator Compute trapezoid specific energy E=y+Q²/(2gA²) with A=(b+z y)y. Runs locally. Not rectangular E=y+v²/(2g), not trapezoid yc, not trapezoid yn, not Manning A,R, not Q=Av.
- Trapezoidal Specific Force Calculator Compute trapezoid specific force M = Q²/(gA) + A ȳ on A=(b+z y)y. Runs locally. Not rectangular ȳ=y/2; not sequent y2; not specific energy E; not Manning; not Q=Av.
- Valve Flow Coefficient Calculator Compute incompressible liquid valve flow from Kv or Cv. Q_m³/h = Kv √(Δp_bar/SG). Kv = 0.865 Cv. Runs locally. Not a venturi, not an orifice, not Q=Av, and not Darcy.
- Velocity Calculator Solve average velocity v=s/t for v, s, or t. Runs locally in your browser.
- Venturi Meter Calculator Compute incompressible venturi flow Q = C_d A2 √(2Δp/(ρ(1−β⁴))) with β = D2/D1. Default C_d = 0.98. Runs locally. Not an orifice plate, not Q=Av, not Darcy, and not valve Cv/Kv.
- Viscosity Calculator τ = η du/dy. Runs locally in your browser.
- Water Hammer Calculator Compute Joukowsky water-hammer Δp = ρ c Δv. Runs locally. Not Darcy f, not minor-loss K, and not Q=Av.
- Watts to Horsepower Converter Convert power between watts and mechanical horsepower (1 hp = 745.6998715822702 W). Runs locally in your browser.
- Wave Celerity Calculator Compute pipe-wave celerity c = √[(K/ρ)/(1+(K D)/(E e))]. Runs locally. Not Joukowsky Δp, not Darcy f, and not minor-loss K.
- Weber Number Calculator Compute the Weber number We = ρ v² L / σ. Runs locally. Not Reynolds, not Froude, not Manning, not Q=Av, and not capillary Ca=μv/σ.
- Weir Discharge Calculator Compute thin-plate weir discharge. Rectangular Q=(2/3) C_d L √(2g) H^{3/2}. V-notch Q=(8/15) C_d √(2g) tan(θ/2) H^{5/2}. Runs locally. Not Manning, not Q=Av, not Darcy, and not an orifice.
- Work and Power Calculator Compute work W=Fs cosθ and power P=W/t or Fv. Runs locally in your browser.
- Young's Modulus Calculator Y = (F/A) / (ΔL/L₀). Runs locally in your browser.