At One Place

Kilocalories to British thermal units

1 kilocalorie in British thermal units
1 kcal = 3.965667 BTU
BTU = kcal × 3.965666831

To convert kilocalories to British thermal units, multiply by 3.965666831. The table below gives the values people look up most often, and the converter works for any number.

Kilocalories to British thermal units table

Common kilocalorie values converted to British thermal units.
Kilocalories British thermal units
1 kcal 3.965667
2 kcal 7.931334
3 kcal 11.897
4 kcal 15.86267
5 kcal 19.82833
10 kcal 39.65667
15 kcal 59.485
20 kcal 79.31334
25 kcal 99.14167
30 kcal 118.97
40 kcal 158.6267
50 kcal 198.2833
75 kcal 297.425
100 kcal 396.5667
250 kcal 991.4167
500 kcal 1,982.8334
1,000 kcal 3,965.6668

How the conversion works

The relationship is BTU = kcal × 3.965666831. Both units measure energy, so the conversion is a fixed factor that never changes.

Kilocalorie: The "calorie" on food labels.

Common questions

How many British thermal units are in one kilocalorie?
One kilocalorie equals 3.965667 British thermal units. BTU = kcal × 3.965666831.
How do you convert kilocalories to British thermal units?
Use BTU = kcal × 3.965666831. So 10 kcal is 39.65667 BTU.
How many kilocalories are in one British thermal unit?
One British thermal unit equals 0.25216 kilocalories, which is the reverse of the conversion above.
Is there more than one kind of kilocalorie?
The "calorie" on food labels.

Related pages

Sources

  1. Guide for the Use of the International System of Units (SP 811) — NIST (Public domain (US Government))
  2. The International System of Units (SI Brochure) — Bureau International des Poids et Mesures
  3. Calculated on this page — At One Place

How these figures are compiled and checked