Therm to Horsepower-Hour Converter

Energy Converter

27 units available

Decimals:

From

To

39.301478

1 thm = 39.301478 hp·h

Formula:

hp·h = thm × 39.3014778922

With your value: 1 thm = 39.30147789 hp·h

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 Horsepower-Hour conversions

2 thm to hp·h 3 thm to hp·h 4 thm to hp·h 5 thm to hp·h 6 thm to hp·h 7 thm to hp·h 8 thm to hp·h

Therm to Horsepower-Hour Conversion Table

Therm (thm)	Horsepower-Hour (hp·h)
0.5	19.650739
1	39.301478
2	78.602956
5	196.507389
10	393.014779
15	589.522168
20	786.029558
25	982.536947
50	1,965.073895
100	3,930.147789
250	9,825.369473
500	19,650.738946
1000	39,301.477892

Horsepower-Hour to Therm Conversion Table

Horsepower-Hour (hp·h)	Therm (thm)
0.5	0.012722
1	0.025444
2	0.050889
5	0.127222
10	0.254443
15	0.381665
20	0.508887
25	0.636108
50	1.272217
100	2.544434
250	6.361084
500	12.722168
1000	25.444336

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

Horsepower-Hour (hp·h)

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 Horsepower-Hour

To convert from Therm (thm) to Horsepower-Hour (hp·h), multiply the value by 39.3014778922.

Formula: hp·h = thm × 39.3014778922

Reverse: thm = hp·h × 0.0254443358

Step-by-Step Example

Start with your value in Therm. For example: 5 thm
Multiply by the conversion factor: 5 x 39.3014778922
The result is: 196.507389 hp·h

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 Horsepower-Hour

The horsepower-hour (hp·h) is a unit of energy and work. One horsepower-hour equals 2.684520 × 10^+6 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 Horsepower-Hour are in 1 Therm?

There are exactly 39.3014778922 Horsepower-Hour in 1 Therm. This means the conversion factor from Therm to Horsepower-Hour is 39.3014778922.

What is the formula to convert Therm to Horsepower-Hour?

The formula to convert Therm to Horsepower-Hour is: hp·h = thm × 39.3014778922. For example, to convert 10 Therm to Horsepower-Hour, you would multiply 10 by 39.3014778922.

What is a Therm?