Energy Converters

Calories to Kilojoules

Convert Calories to Kilojoules instantly with Kilojoules = Calories × 0.004184.

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What is this conversion?

The Calories to Kilojoules converter applies Kilojoules = Calories × 0.004184 for scientific and nutritional energy work. Pair pages focus on one direction with swap, charts, and live AJAX results.

Energy units appear in physics labs, nutrition labels, battery specs, and utility planning. Use precision controls for reporting and verify food Calories (kcal) separately when labels mean kilocalories.

How to convert

  1. Enter a value
  2. Choose precision
  3. Read the result and table
  4. Swap for the reverse converter

Formula used

Kilojoules = Calories × 0.004184

Conversion formula explanation

This page applies the formula above with your chosen precision. Step-by-step math appears in the live result panel after conversion.

Examples

Example uses Kilojoules = Calories × 0.004184 for Calories → Kilojoules.

Conversion chart

Reference values for this converter. Live tables also appear in the result panel after you convert.

Calories Kilojoules
1 cal 0.0042 kJ
100 cal 0.4184 kJ
239 cal 1 kJ
1,000.0000 cal 4.184 kJ
4,184.0000 cal 17.5059 kJ

Frequently Asked Questions

How do I convert Calories to Kilojoules?

Enter Calories; we apply Kilojoules = Calories × 0.004184.

Is this small calorie or food Calorie?

This tool uses the small calorie (cal) relationship to joules unless your label specifies kcal.

Can I reverse it?

Yes — use Swap units to open the reverse converter.