⚡ Energy converter

BTU to Calorie Converter

Convert BTU (BTU) to calories (cal) instantly with the exact formula, a conversion table and chart.

BTU

Results

Calories
252.164400722 cal
Same value in every unit

📊 BTU to Calorie chart

BTU to Calorie — plotted against btu (btu).

How to convert BTU to calories

To convert BTU to calories, multiply by 252.164400722. Energy conversions connect nutrition, electricity bills, heating systems and physics.

cal = BTU × 252.164400722 BTU = cal ÷ 252.164400722
BTU to Calorie conversion – BTU to cal formula illustration
BTU (BTU) → Calorie (cal) at a glance.

BTU to Calorie conversion table

BTU (BTU)Calorie (cal)
0.1 BTU25.2164400722 cal
0.5 BTU126.082200361 cal
1 BTU252.164400722 cal
2 BTU504.328801444 cal
3 BTU756.493202165 cal
4 BTU1,008.65760289 cal
5 BTU1,260.82200361 cal
10 BTU2,521.64400722 cal
20 BTU5,043.28801444 cal
25 BTU6,304.11001804 cal
50 BTU12,608.2200361 cal
100 BTU25,216.4400722 cal
500 BTU126,082.200361 cal
1,000 BTU252,164.400722 cal

About the units

BTU (BTU)

The International Table British thermal unit is about 1,055.06 joules, used for HVAC and heating.

Calorie (cal)

A (small) thermochemical calorie is exactly 4.184 joules.

How to use this converter

  1. Type the number of BTU (BTU) in the input box.
  2. The result in calories appears instantly — no button needed.
  3. See the same value in every other energy unit just below.
  4. Use “Swap units” to convert calories back to BTU.

Tips for better results

  • Double-check which system a unit belongs to (for example US vs UK gallons).
  • Use the swap button to convert in the opposite direction instantly.
  • Bookmark the conversions you use most — each pair has its own page.

Frequently asked questions

How many calories are in one btu?

One btu equals 252.164400722 calories. 252.164400722 is the exact factor used by this converter.

How do I convert BTU to calories?

Multiply the value in BTU by 252.164400722. To go the other way, multiply calories by 0.00396566683139.

What is 10 BTU in cal?

10 BTU = 2,521.64400722 cal. Also, 5 BTU = 1,260.82200361 cal and 100 BTU = 25,216.4400722 cal.

What is the difference between a btu and a calorie?

The International Table British thermal unit is about 1,055.06 joules, used for HVAC and heating. A (small) thermochemical calorie is exactly 4.184 joules.

Is this tool free and private?

Yes — the BTU to Calorie is completely free with no sign-up, and it runs entirely in your browser, so the values you enter are never uploaded to our servers.

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