Therm to Calorie (IT) Converter

Energy Converter

27 units available

Decimals:

From

To

25,199,576.111111

1 thm = 25,199,576.111111 cal (IT)

Formula:

cal (IT) = thm × 25,199,576.111111112

With your value: 1 thm = 25,199,576.11111111 cal (IT)

How big is that?

Everyday references on a logarithmic scale, all expressed in therm so you can sanity-check the result.

Heartbeat (1/1.1e+8 your value)9.48e-9 thm

AA battery charge (1/1.1e+4 your value)0.0000948 thm

Slice of bread (1/3.8e+2 your value)0.00265 thm

Daily food intake (1/13 your value)0.0796 thm

Litre of petrol (1/3.1 your value)0.324 thm

Your value1.00 thm

Other Therm to Calorie (IT) conversions

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

Therm to Calorie (IT) Conversion Table

Therm (thm)	Calorie (IT) (cal (IT))
0.5	12,599,788.055556
1	25,199,576.111111
2	50,399,152.222222
5	125,997,880.555556
10	251,995,761.111111
15	377,993,641.666667
20	503,991,522.222222
25	629,989,402.777778
50	1,259,978,805.555555
100	2,519,957,611.111111
250	6,299,894,027.777778
500	12,599,788,055.555555
1000	25,199,576,111.11111

Calorie (IT) to Therm Conversion Table

Calorie (IT) (cal (IT))	Therm (thm)
0.5	1.984160e-8
1	3.968321e-8
2	7.936641e-8
5	1.984160e-7
10	3.968321e-7
15	5.952481e-7
20	7.936641e-7
25	9.920802e-7
50	1.984160e-6
100	3.968321e-6
250	9.920802e-6
500	1.984160e-5
1000	3.968321e-5

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.

Therm (thm)

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 Therm to Calorie (IT)

To convert from Therm (thm) to Calorie (IT) (cal (IT)), multiply the value by 25,199,576.111111112.

Formula: cal (IT) = thm × 25,199,576.111111112

Reverse: thm = cal (IT) × 3.968321e-8

Step-by-Step Example

Start with your value in Therm. For example: 5 thm
Multiply by the conversion factor: 5 x 25,199,576.111111112
The result is: 125,997,880.555556 cal (IT)

About Therm

The therm (thm) is a unit of energy and work. One therm equals 1.055056 × 10^+8 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 Therm?

There are exactly 25,199,576.111111112 Calorie (IT) in 1 Therm. This means the conversion factor from Therm to Calorie (IT) is 25,199,576.111111112.

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

The formula to convert Therm to Calorie (IT) is: cal (IT) = thm × 25,199,576.111111112. For example, to convert 10 Therm to Calorie (IT), you would multiply 10 by 25,199,576.111111112.

What is a Therm?