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Calories to Kilocalories Converter

Convert calories (thermochemical) (cal) to kilocalories (food Calories) (kcal), with the formula, a conversion table and exact factors.

Change the values and press Calculate to work out your own figures.

Enter an amount of energy, choose its unit and the unit you want. The answer is exact until it is shown, and the same value appears in every other unit.

A number, fraction (3/8), mixed number (1 1/2), scientific notation (2.5e6) or a simple sum such as 2*3.
The unit you want the answer in. Swap exchanges the two units.
Result
0.001 kcal
joules (watt-seconds)
4.184 J
kilojoules
0.004184 kJ
megajoules
4.184 × 10⁻⁶ MJ
gigajoules
4.184 × 10⁻⁹ GJ
megacalories
1 × 10⁻⁶ Mcal
watt-hours
0.00116222222222 Wh
kilowatt-hours
1.16222222222 × 10⁻⁶ kWh
megawatt-hours
1.16222222222 × 10⁻⁹ MWh
British thermal units (IT)
0.00396566683139 Btu
million Btu
3.96566683139 × 10⁻⁹ MMBtu
therms (100,000 Btu)
3.96566683139 × 10⁻⁸ thm
quads (10¹⁵ Btu)
3.96566683139 × 10⁻¹⁸ quad
electronvolts
2.61144739675 × 10¹⁹ eV
kiloelectronvolts
2.61144739675 × 10¹⁶ keV
megaelectronvolts
26,114,473,967,500 MeV

1 cal = 0.001 kcal

Show the working
  1. 1 cal = 0.001 kcal
  2. 1 × 0.001 = 0.001 kcal

How to convert calories to kilocalories

1 cal = 0.001 kcal, so multiply by 0.001 to go from calories (thermochemical) to kilocalories (food Calories). Going the other way, 1 kcal = 1,000 cal.

kcal = cal × 0.001
cal = kcal × 1,000

Worked example:

1 cal = 0.001 kcal
5 × 0.001 = 0.005 kcal

Calories to kilocalories table

CaloriesKilocalories
1 cal0.001 kcal
2 cal0.002 kcal
3 cal0.003 kcal
4 cal0.004 kcal
5 cal0.005 kcal
6 cal0.006 kcal
7 cal0.007 kcal
8 cal0.008 kcal
9 cal0.009 kcal
10 cal0.01 kcal
15 cal0.015 kcal
20 cal0.02 kcal
25 cal0.025 kcal
30 cal0.03 kcal
40 cal0.04 kcal
50 cal0.05 kcal
75 cal0.075 kcal
100 cal0.1 kcal
250 cal0.25 kcal
500 cal0.5 kcal
1000 cal1 kcal

About the units

Calories (cal)
Calories (thermochemical), a specialised unit. The thermochemical calorie, 4.184 J, used on US food labels as 1 Calorie = 1 kilocalorie. Definition: NIST SP 811 Appendix B.8, factors for units listed alphabetically.
Kilocalories (kcal)
Kilocalories (food Calories), a specialised unit. Definition: NIST SP 811 Appendix B.8, factors for units listed alphabetically.

Formula version 0.1.0Reviewed