Energy Converter

Convert between chemical, electrical and physical energy units.

Energy
6
Printable Chart
Related Examples

Trending Now

Age Calculator 365 days to years Days Until New Year Business Days Days Until Halloween Time Chart 5 miles to km 32 °F to °C Days Until Christmas FIFA World Cup 2026 2 liters to cups

Recent Tools

Popular Conversions

Kilowatt-Hours to Megajoules Megajoules to Kilowatt-Hours Joules to Calories Kilocalories to Kilojoules British Thermal Units to Joules Watt-Hours to Joules

Formula

J = cal × 4.184

Example

Example: convert 1000 calories to joules.

1000 cal = 4184 J

Conversion table

calories (cal) joules (J)
1 cal 4.184 J
2 cal 8.368 J
5 cal 20.92 J
10 cal 41.84 J
20 cal 83.68 J
50 cal 209.2 J
100 cal 418.4 J

Explanation

These are both units.

How to convert calories to joules

  1. Start with the value in calories (cal).
  2. Multiply it by 4.184.
  3. The result is the measurement in joules (J).

Example: 1000 cal → 4184 J

Frequently Asked Questions

How much is 1000 calories in joules?

1000 calories equals 4184 joules.

How many joules is 1 calorie?

1 calorie equals 4.184 joules.

How many calories is 1 joule?

1 joule equals 0.239005736138 calories.

What is the difference between calories and joules?

Both measure energy in SI. The main difference is usually scale: some units are convenient for smaller values, while others are used to express larger values more practically.

Where are calories and joules used?

They are used in physics and engineering to measure work, energy, and heat; the most practical unit depends on the magnitude.

Why does 1 calorie equal 4.184 joules?

Because the units are defined with a fixed relationship. To convert calories to joules, multiply by that factor.