BTU to Calories Conversion (BTU to cal)

British Thermal Units to Calories Converter

Enter the energy in british thermal units below to convert it to calories.

Result in Calories:

1 BTU = 252.164401 cal

How to Convert British Thermal Units to Calories

To convert a measurement in british thermal units to a measurement in calories, multiply the energy by the following conversion ratio: 252.164401 calories/british thermal unit.

Since one british thermal unit is equal to 252.164401 calories, you can use this simple formula to convert:

calories = british thermal units × 252.164401

The energy in calories is equal to the energy in british thermal units multiplied by 252.164401.

For example, here's how to convert 5 british thermal units to calories using the formula above.

calories = (5 BTU × 252.164401) = 1,260.822004 cal

How Many Calories Are in a British Thermal Unit?

There are 252.164401 calories in a british thermal unit, which is why we use this value in the formula above.

1 BTU = 252.164401 cal

British thermal units and calories are both units used to measure energy. Keep reading to learn more about each unit of measure.

What Is a British Thermal Unit?

British thermal units are a measure of heat energy. Specifically, one british thermal unit is equal to the amount of heat energy required to increase the temperature of one pound of water one degree Fahrenheit. They are often used as a way to rate the energy heat producing appliances such furnaces, and to price heating fuels such as natural gas.

The british thermal unit is a US customary unit of energy. British thermal units can be abbreviated as BTU; for example, 1 british thermal unit can be written as 1 BTU.

Learn more about british thermal units.

What Is a Calorie?

One calorie is equal to the heat needed to raise the temperature of one gram of water from 14.5 to 15.5 degrees Celsius.

When measuring the energy content in foods, the large calorie, or kilocalorie is used, but it's often still just called a "calorie." When both the calorie and large calorie are used in the same context it is common to refer to the calorie as a "small calorie."

Calories can be abbreviated as cal; for example, 1 calorie can be written as 1 cal.

Learn more about calories.

British Thermal Unit to Calorie Conversion Table

Table showing various british thermal unit measurements converted to calories.
British Thermal Units	Calories
1 BTU	252.16 cal
2 BTU	504.33 cal
3 BTU	756.49 cal
4 BTU	1,009 cal
5 BTU	1,261 cal
6 BTU	1,513 cal
7 BTU	1,765 cal
8 BTU	2,017 cal
9 BTU	2,269 cal
10 BTU	2,522 cal
11 BTU	2,774 cal
12 BTU	3,026 cal
13 BTU	3,278 cal
14 BTU	3,530 cal
15 BTU	3,782 cal
16 BTU	4,035 cal
17 BTU	4,287 cal
18 BTU	4,539 cal
19 BTU	4,791 cal
20 BTU	5,043 cal
21 BTU	5,295 cal
22 BTU	5,548 cal
23 BTU	5,800 cal
24 BTU	6,052 cal
25 BTU	6,304 cal
26 BTU	6,556 cal
27 BTU	6,808 cal
28 BTU	7,061 cal
29 BTU	7,313 cal
30 BTU	7,565 cal
31 BTU	7,817 cal
32 BTU	8,069 cal
33 BTU	8,321 cal
34 BTU	8,574 cal
35 BTU	8,826 cal
36 BTU	9,078 cal
37 BTU	9,330 cal
38 BTU	9,582 cal
39 BTU	9,834 cal
40 BTU	10,087 cal

Table showing various british thermal unit measurements converted to calories.

British Thermal Units

Calories

1 BTU

252.16 cal

2 BTU

504.33 cal

3 BTU

756.49 cal

4 BTU

1,009 cal

5 BTU

1,261 cal

6 BTU

1,513 cal

7 BTU

1,765 cal

8 BTU

2,017 cal

9 BTU

2,269 cal

10 BTU

2,522 cal

11 BTU

2,774 cal

12 BTU

3,026 cal

13 BTU

3,278 cal

14 BTU

3,530 cal

15 BTU

3,782 cal

16 BTU

4,035 cal

17 BTU

4,287 cal

18 BTU

4,539 cal

19 BTU

4,791 cal

20 BTU

5,043 cal

21 BTU

5,295 cal

22 BTU

5,548 cal

23 BTU

5,800 cal

24 BTU

6,052 cal

25 BTU

6,304 cal

26 BTU

6,556 cal

27 BTU

6,808 cal

28 BTU

7,061 cal

29 BTU

7,313 cal

30 BTU

7,565 cal

31 BTU

7,817 cal

32 BTU

8,069 cal

33 BTU

8,321 cal

34 BTU

8,574 cal

35 BTU

8,826 cal

36 BTU

9,078 cal

37 BTU

9,330 cal

38 BTU

9,582 cal

39 BTU

9,834 cal

40 BTU

10,087 cal