BTU / cal

British thermal unit to Calorie converter

1 BTU = 252.164401 cal

This is the British thermal unit to Calorie converter. The factor is fixed: 1 BTU = 252.1644007218 cal. Open a common amount below, or type any value — only selected amounts are indexed.

Common values

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

Same amount, other units

1 BTU → kcal 1 BTU → kJ 1 BTU → kWh 1 BTU → MJ

Formula: BTU to calorie

cal = BTU × 252.164401 (1 BTU = 252.164401 CAL)

Reference values: BTU → calorie

BTU	cal
1 BTU	252.164401 cal
100 BTU	25216.440072 cal
200 BTU	50432.880144 cal
500 BTU	126082.200361 cal
1000 BTU	252164.400722 cal
2000 BTU	504328.801444 cal

Common conversions

1 BTU → 252.164401 cal 2 BTU → 504.328801 cal 5 BTU → 1260.822004 cal 10 BTU → 2521.644007 cal 20 BTU → 5043.288014 cal 25 BTU → 6304.110018 cal 50 BTU → 12608.220036 cal 75 BTU → 18912.330054 cal 100 BTU → 25216.440072 cal 120 BTU → 30259.728087 cal 150 BTU → 37824.660108 cal 200 BTU → 50432.880144 cal

FAQ for BTU → cal

Reverse?

1 calorie ≈ 0.003966 BTU.

How much is 1 BTU in calorie?

252.164401 calorie (1 BTU = 252.164401 calorie).

What is a BTU?

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

BTU vs kcal?

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

Manual conversion?

cal = BTU × 252.164401 (1 BTU = 252.164401 CAL)

How the British thermal unit to Calorie converter works

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

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