Therm to BTU (IT) Converter

Energy Converter

27 units available

Decimals:

From

To

100,000

1 thm = 100,000 BTU (IT)

Formula:

BTU (IT) = thm × 100,000

With your value: 1 thm = 100,000 BTU (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 BTU (IT) conversions

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

Therm to BTU (IT) Conversion Table

Therm (thm)	BTU (IT) (BTU (IT))
0.5	50,000
1	100,000
2	200,000
5	500,000
10	1,000,000
15	1,500,000
20	2,000,000
25	2,500,000
50	5,000,000
100	10,000,000
250	25,000,000
500	50,000,000
1000	100,000,000

BTU (IT) to Therm Conversion Table

BTU (IT) (BTU (IT))	Therm (thm)
0.5	5.000000e-6
1	1.000000e-5
2	2.000000e-5
5	5.000000e-5
10	0.0001
15	0.00015
20	0.0002
25	0.00025
50	0.0005
100	0.001
250	0.0025
500	0.005
1000	0.01

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

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

How to Convert Therm to BTU (IT)

To convert from Therm (thm) to BTU (IT) (BTU (IT)), multiply the value by 100,000.

Formula: BTU (IT) = thm × 100,000

Reverse: thm = BTU (IT) × 0.00001

Step-by-Step Example

Start with your value in Therm. For example: 5 thm
Multiply by the conversion factor: 5 x 100,000
The result is: 500,000 BTU (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 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.

Frequently Asked Questions

How many BTU (IT) are in 1 Therm?

There are exactly 100,000 BTU (IT) in 1 Therm. This means the conversion factor from Therm to BTU (IT) is 100,000.

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

The formula to convert Therm to BTU (IT) is: BTU (IT) = thm × 100,000. For example, to convert 10 Therm to BTU (IT), you would multiply 10 by 100,000.

What is a Therm?