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kcal to cal

Convert kilocalories (kcal) to calories (cal) and vice versa.

What this tool does

Convert kilocalories (kcal) to calories (cal) and vice versa. Type an amount in kilocalories (thermochemical), choose the units, and the tool converts it to calories (thermochemical). It offers 4 energy units and also shows the same amount in the others.

Inputs

  • Value: A number.
  • From: Choose one: Kilocalorie (thermochemical), Calorie (thermochemical), Joule, Kilojoule. Starts as Kilocalorie (thermochemical).
  • To: Choose one of the same 4 units as "From". Starts as Calorie (thermochemical).

How to use

  1. Enter the amount you want to convert.
  2. Choose the unit to convert from and the unit to convert to.
  3. Read the result: the converted amount and the same amount in the other units. It appears once every required field has a valid value.

Worked examples

Conversions from kilocalories (thermochemical) to calories (thermochemical):

  • 1 kcal (th) = 1,000 cal (th)
  • 5 kcal (th) = 5,000 cal (th)
  • 10 kcal (th) = 10,000 cal (th)
  • 50 kcal (th) = 50,000 cal (th)
  • 100 kcal (th) = 100,000 cal (th)

Multiply the number of kilocalories (thermochemical) by 1,000 to get calories (thermochemical). Both units are exact definitions, so 1,000 is the exact factor: 1 kcal (th) = 1,000 cal (th).

Sources: Kilocalorie (thermochemical): exact by definition. Calorie (thermochemical): NIST SP 811 (2008), Appendix B.8.

Limitations

  • Converts units of energy only. It does not work out energy from power, time, voltage or charge.

FAQs

Q: How many calories (thermochemical) are in one kilocalorie (thermochemical)?
A: One kilocalorie (thermochemical) is 1000 calories (thermochemical). Change the value to convert any amount; the other units are listed below the result.
Q: Which definition of the units does this page use?
A: Calories here are thermochemical calories (1 cal = 4.184 J exactly), the definition commonly used in chemistry and nutrition. The International Table calorie (4.1868 J) is slightly larger.
Q: Can I convert from calories (thermochemical) to kilocalories (thermochemical)?
A: Yes. Choose calorie (thermochemical) in the From box and kilocalorie (thermochemical) in the To box. One calorie (thermochemical) is 0.001 kilocalories (thermochemical).

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