BTU (IT) to Calorie (IT) Converter

Energy Converter

27 units available

Decimals:

From

To

251.995761

1 BTU (IT) = 251.995761 cal (IT)

Formula:

cal (IT) = BTU (IT) × 251.9957611111

With your value: 1 BTU (IT) = 251.99576111 cal (IT)

How big is that?

Everyday references on a logarithmic scale, all expressed in btu (it) so you can sanity-check the result.

Heartbeat (1/1.1e+3 your value)0.000948 BTU (IT)

Your value1.00 BTU (IT)

AA battery charge (9.5× your value)9.48 BTU (IT)

Slice of bread (2.7e+2× your value)265 BTU (IT)

Daily food intake (8.0e+3× your value)7.96e+3 BTU (IT)

Litre of petrol (3.2e+4× your value)3.24e+4 BTU (IT)

Other BTU (IT) to Calorie (IT) conversions

2 BTU (IT) to cal (IT)3 BTU (IT) to cal (IT)4 BTU (IT) to cal (IT)5 BTU (IT) to cal (IT)6 BTU (IT) to cal (IT)7 BTU (IT) to cal (IT)8 BTU (IT) to cal (IT)

BTU (IT) to Calorie (IT) Conversion Table

BTU (IT) (BTU (IT))	Calorie (IT) (cal (IT))
0.5	125.997881
1	251.995761
2	503.991522
5	1,259.978806
10	2,519.957611
15	3,779.936417
20	5,039.915222
25	6,299.894028
50	12,599.788056
100	25,199.576111
250	62,998.940278
500	125,997.880556
1000	251,995.761111

Calorie (IT) to BTU (IT) Conversion Table

Calorie (IT) (cal (IT))	BTU (IT) (BTU (IT))
0.5	0.001984
1	0.003968
2	0.007937
5	0.019842
10	0.039683
15	0.059525
20	0.079366
25	0.099208
50	0.198416
100	0.396832
250	0.99208
500	1.98416
1000	3.968321

Where these values come from

Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.

BTU (IT) (BTU (IT))

Energy

Exact conversion

Derived from the joule (1 J = 1 kg·m²/s²). Thermochemical and IT calories, BTU and kWh are exact defined multiples.

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

Calorie (IT) (cal (IT))

Energy

Exact conversion

Derived from the joule (1 J = 1 kg·m²/s²). Thermochemical and IT calories, BTU and kWh are exact defined multiples.

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

How to Convert BTU (IT) to Calorie (IT)

To convert from BTU (IT) (BTU (IT)) to Calorie (IT) (cal (IT)), multiply the value by 251.9957611111.

Formula: cal (IT) = BTU (IT) × 251.9957611111

Reverse: BTU (IT) = cal (IT) × 0.0039683207

Step-by-Step Example

Start with your value in BTU (IT). For example: 5 BTU (IT)
Multiply by the conversion factor: 5 x 251.9957611111
The result is: 1,259.978806 cal (IT)

About BTU (IT)

The btu (it) (BTU (IT)) is a unit of energy and work. One btu (it) equals 1055.055853 joules. UnitConvertLab converts it against every other energy unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: energy calculations, engineering and science, education.

About Calorie (IT)

The calorie (it) (cal (IT)) is a unit of energy and work. One calorie (it) equals 4.1868 joules. UnitConvertLab converts it against every other energy unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: energy calculations, engineering and science, education.

Frequently Asked Questions

How many Calorie (IT) are in 1 BTU (IT)?

There are exactly 251.9957611111 Calorie (IT) in 1 BTU (IT). This means the conversion factor from BTU (IT) to Calorie (IT) is 251.9957611111.

What is the formula to convert BTU (IT) to Calorie (IT)?

The formula to convert BTU (IT) to Calorie (IT) is: cal (IT) = BTU (IT) × 251.9957611111. For example, to convert 10 BTU (IT) to Calorie (IT), you would multiply 10 by 251.9957611111.

What is a BTU (IT)?