cal / BTU

Calorie to British thermal unit converter

1 cal = 0.003966 BTU

This is the Calorie to British thermal unit converter. The factor is fixed: 1 cal = 0.003965666831390877 BTU. Open a common amount below, or type any value — only selected amounts are indexed.

Common values

BTU to calorie 2 calories in BTU 5 calories in BTU 10 calories in BTU 20 calories in BTU 25 calories in BTU 50 calories in BTU 75 calories in BTU 100 calories in BTU 120 calories in BTU 150 calories in BTU

Same amount, other units

1 calorie → kcal 1 calorie → kJ 1 calorie → kWh 1 calorie → MJ

Formula: calorie to BTU

BTU = cal × 0.003966 (1 CAL = 0.003966 BTU)

Reference values: calorie → BTU

cal	BTU
1 cal	0.003966 BTU
100 cal	0.396567 BTU
200 cal	0.793133 BTU
500 cal	1.982833 BTU
1000 cal	3.965667 BTU
2000 cal	7.931334 BTU

Common conversions

1 cal → 0.003966 BTU 2 cal → 0.007931 BTU 5 cal → 0.019828 BTU 10 cal → 0.039657 BTU 20 cal → 0.079313 BTU 25 cal → 0.099142 BTU 50 cal → 0.198283 BTU 75 cal → 0.297425 BTU 100 cal → 0.396567 BTU 120 cal → 0.47588 BTU 150 cal → 0.59485 BTU 200 cal → 0.793133 BTU

FAQ for cal → BTU

BTU vs kcal?

Both measure energy. Roughly 1 kcal ≈ 3.97 BTU (IT). Use the exact factor on this page.

Manual conversion?

BTU = cal × 0.003966 (1 CAL = 0.003966 BTU)

Reverse?

1 BTU ≈ 252.164401 calorie.

How much is 1 calorie in BTU?

0.003966 BTU (1 calorie = 0.003966 BTU).

What is a BTU?

British thermal unit-energy needed to raise the temperature of water; common for AC and heating capacity ratings.

How the Calorie to British thermal unit converter works

This hub describes the pair, not a single number. Pages like 1, 10 or 100 Calorie answer exact searches.

NiftyRecipe uses thermochemical energy factors (for example 1 kcal = 4184 J). Results do not change with the time of day.