kilocalories to joules

Convert kilocalorie (food cal) to joule — instant, free, with the formula shown.

1 kcal=4184 J

How to convert kilocalorie (food cal) to joule

To convert kilocalorie (food cal) to joule, multiply by 4184:

J = kcal × 4184

For example, 10 kcal × 4184 = 41840 J.

kcal to J conversion table

kilocalories (kcal)	joules (J)
1 kcal	4184 J
2 kcal	8368 J
5 kcal	20920 J
10 kcal	41840 J
25 kcal	104600 J
50 kcal	209200 J
100 kcal	418400 J
250 kcal	1046000 J
500 kcal	2092000 J
1000 kcal	4184000 J

Reverse: Joule to Kilocalorie (food cal)

Other kilocalorie (food cal) conversions

kcal → kJ kcal → cal kcal → Wh kcal → kWh kcal → BTU kcal → thm kcal → eV kcal → ft·lb

Convert to joule from another unit

kJ → J cal → J Wh → J kWh → J BTU → J thm → J eV → J ft·lb → J

kcal to J — frequently asked

How many joules are in 1 kilocalorie (food cal)?

1 kilocalorie (food cal) = 4184 joules (kcal × 4184 = J).

What is the formula to convert kilocalorie (food cal) to joule?

Multiply your kilocalorie (food cal) value by 4184 to get joule.

How do I convert 10 kilocalories to joules?

10 kcal = 41840 J. For 100 kcal the answer is 418400 J. Use the calculator on this page for any other value.

When to convert kilocalorie (food cal) to joule

1Electricity bills (kWh)

2Nutrition labels (kcal / food cal)

3HVAC and heating (BTU, therms)

4Physics and chemistry (J, eV)

Energy conversion — common questions

Is a food calorie the same as a calorie?

No — a food 'Calorie' (capital C) actually means 1 kilocalorie = 1,000 small calories = 4,184 J. Nutrition labels typically write 'cal' meaning kcal.

How many joules in 1 kWh?

1 kWh = 3,600,000 J (3.6 MJ). Because 1 kW × 1 hour = 1,000 W × 3,600 s = 3,600,000 J.

What is a BTU?

British Thermal Unit — the energy required to raise 1 pound of water by 1 °F. 1 BTU ≈ 1,055 J.

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