Calories to Joules Converter

1 cal = 4.184 J. Type any value below for the exact joules figure.

cal
4.184J

1 cal = 4.184 J

Conversion summary

1 cal = 4.184 J

Formula
Joule = Calorie × 4.184
Category
Energy and Power
Units
cal → J

1 cal in other units

Values update with the converter above. Select a row to open that conversion's detailed page.

  • Joule4.184 J
  • Kilojoule0.004184 kJ
  • Megajoule0.000004184 MJ
  • Watt-hour0.001162222 Wh
  • Kilowatt-hour0.000001162222 kWh
  • Kilocalorie0.001 kcal
  • BTU0.003965667 Btu
  • Therm0.00000003965667 th
  • Quadrillion BTU3.96567E-18 quad BTU
  • Electronvolt2.61145E19 eV

How do you convert calories to joules?

To convert calories to joules, multiply the number of calories by 4.184. 1 cal = 4.184 J.

Conversion formula

Joule = Calorie × 4.184

Calories to joules conversion table

Calories (cal)Joules (J)
1 cal4.184 J
10 cal41.84 J
50 cal209.2 J
100 cal418.4 J
500 cal2,092 J
1,000 cal4,184 J
5,000 cal20,920 J

What is Calorie?

The calorie is a traditional energy unit originally defined based on heating water.

Short history of Calorie

Historically common in chemistry and nutrition science.

Open the Calorie unit guide

What is Joule?

The joule is the SI derived unit of energy. It is used for work, heat and energy quantities.

Short history of Joule

The joule became the standard SI reference for energy as mechanics and thermodynamics were unified in modern measurement.

Open the Joule unit guide

Frequently asked questions

What is 1 Calorie in Joule?

1 cal = 4.184 J.

How do you convert Calorie to Joule?

To convert calories to joules, multiply the number of calories by 4.184. 1 cal = 4.184 J.

Frequently asked questions

How many joules are in 1 calorie?

1 cal = 4.184 J.

How do you convert calories to joules?

To convert calories to joules, multiply the number of calories by 4.184. 1 cal = 4.184 J.

How many calories are in 1 joule?

1 J = 0.239006 cal.

Sources

  1. BIPM: The International System of Units (SI Brochure)
  2. NIST: NIST Guide to the SI — Appendix B.8: Factors for Units Listed Alphabetically
  3. NIST: Guide to the SI — Conversion Factors

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