Therm to Kilocalorie Converter

Energy Converter

27 units available

Decimals:

From

To

25,216.440072

1 thm = 25,216.440072 kcal

Formula:

kcal = thm × 25,216.4400721797

With your value: 1 thm = 25,216.44007218 kcal

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 Kilocalorie conversions

2 thm to kcal 3 thm to kcal 4 thm to kcal 5 thm to kcal 6 thm to kcal 7 thm to kcal 8 thm to kcal

Therm to Kilocalorie Conversion Table

Therm (thm)	Kilocalorie (kcal)
0.5	12,608.220036
1	25,216.440072
2	50,432.880144
5	126,082.200361
10	252,164.400722
15	378,246.601083
20	504,328.801444
25	630,411.001804
50	1,260,822.003609
100	2,521,644.007218
250	6,304,110.018045
500	12,608,220.03609
1000	25,216,440.07218

Kilocalorie to Therm Conversion Table

Kilocalorie (kcal)	Therm (thm)
0.5	1.982833e-5
1	3.965667e-5
2	7.931334e-5
5	0.000198
10	0.000397
15	0.000595
20	0.000793
25	0.000991
50	0.001983
100	0.003966
250	0.009914
500	0.019828
1000	0.039657

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

Kilocalorie (kcal)

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 Kilocalorie

To convert from Therm (thm) to Kilocalorie (kcal), multiply the value by 25,216.4400721797.

Formula: kcal = thm × 25,216.4400721797

Reverse: thm = kcal × 0.0000396567

Step-by-Step Example

Start with your value in Therm. For example: 5 thm
Multiply by the conversion factor: 5 x 25,216.4400721797
The result is: 126,082.200361 kcal

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 Kilocalorie

The kilocalorie (food Calorie) equals 1,000 calories or 4,184 joules. It is the standard unit for food energy content.

Common uses: nutrition, diet, food labeling.

Frequently Asked Questions

How many Kilocalorie are in 1 Therm?

There are exactly 25,216.4400721797 Kilocalorie in 1 Therm. This means the conversion factor from Therm to Kilocalorie is 25,216.4400721797.

What is the formula to convert Therm to Kilocalorie?

The formula to convert Therm to Kilocalorie is: kcal = thm × 25,216.4400721797. For example, to convert 10 Therm to Kilocalorie, you would multiply 10 by 25,216.4400721797.

What is a Therm?