Energy conversion

Calories to Joules conversion

Convert calories (cal) to joules (J). Thermochemical: 1 cal ≈ 4.184 J. Clarifies food Calorie vs small calorie; formula and chart. Fast and free.

Instant result

Result

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Inputs —

Mode —

Formula —

Formulas

Core equations used by this converter.

cal → JJ = cal × 4.184

Exact factor1 cal = 4.184 J

J → calcal = J × 1/4.184

iLinear conversion using factor 4.184. Prefer the exact factor over rounded multipliers when precision matters.

How to use

1

Choose cal → J or J → cal

Use the tabs to switch direction. Forward mode needs calories; reverse uses the opposite unit.

2

Enter the value

Type a non-negative value in the active unit field.

3

Convert and read the result

Use Convert or let the result update automatically.

Example conversions

Common values with formula and result.

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10 cal to joules

10 cal to joules

10 × 4.184 = 41.84 J

41.84 J

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100 cal to joules

100 cal to joules

100 × 4.184 = 418.4 J

418.4 J

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1 food Calorie (1 kcal) to joules

1 food Calorie (1 kcal) to joules

1 × 4184 = 4184 J

4184 J

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Reverse: 41.84 J → cal

Reverse: 41.84 J → cal

41.84 ÷ 4.184 = 10 cal

10 cal

Calories to Joules conversion specification

Version 1.1.0 · Engine tested

Calculation status

Engine tested 4 published cases
Named expert review Not performed
Calculation version 1.1.0

Definition: **Calorie (cal)** — energy to raise 1 g of water by about 1 °C; thermochemical definition ≈ **4.184 J**. **Joule (J)** — SI energy unit. **Small calorie (cal)** — thermochemical calorie ≈ **4.184 J** (physics/chemistry).
What it calculates: Value between cal and J. Switch direction with the converter tabs.
Inputs: Calories (cal) or reverse unit (J)
Outputs: Converted value in J or cal
Formula: J = cal × 4.184 · 1 cal = 4.184 J
Calories to joules conversion table: Calories (cal) Joules (J)
1 cal 4.184 J
5 cal 20.92 J
10 cal 41.84 J
50 cal 209.2 J
100 cal 418.4 J
500 cal 2092 J
1000 cal (= 1 kcal) 4184 J
2000 cal 8368 J
Assumptions: Conversion runs locally in the browser; values are not uploaded.
Uses the standard factor/definition for these units.
Units: cal → J
J → cal
Boundary conditions: Empty or non-numeric input yields no valid result.
Non-negative values are expected for physical quantities.
Example: 1 cal → 4.184 J
Validation cases: 1 cal → 4.184 J
10 cal → 41.84 J
50 cal → 209.2 J
100 cal → 418.4 J
Sources: SI / international unit definitions where applicable
CalculatorX conversion factors (local runtime)
Calculation version: 1.1.0

Background

Interpretation and common distinctions.

Use the converter tabs to switch direction when available. Results for Calories to Joules conversion update locally in your browser.

Frequently asked questions

Key distinctions behind the conversion.

How do you convert using Calories to Joules conversion?

Use 1 cal = 4.184 J. Example: 10 cal to joules → 41.84 J.

Can I switch direction?

Use the converter tabs when available, or open the related reverse tool from Related.

Does this run online or locally?

Calculation runs locally in your browser. Values are not uploaded.

How precise are the results?

Results follow the formulas on this page. Round to the precision your use case needs.