Horsepower-Hour to Therm Converter

Energy Converter

27 units available

Decimals:

From

To

0.025444

1 hp·h = 0.025444 thm

Formula:

thm = hp·h × 0.0254443358

With your value: 1 hp·h = 0.02544434 thm

How big is that?

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

Heartbeat (1/2.7e+6 your value)3.73e-7 hp·h

AA battery charge (1/2.7e+2 your value)0.00373 hp·h

Slice of bread (1/9.6 your value)0.104 hp·h

Your value1.00 hp·h

Daily food intake (3.1× your value)3.13 hp·h

Litre of petrol (13× your value)12.7 hp·h

Other Horsepower-Hour to Therm conversions

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

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

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

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.

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

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

How to Convert Horsepower-Hour to Therm

To convert from Horsepower-Hour (hp·h) to Therm (thm), multiply the value by 0.0254443358.

Formula: thm = hp·h × 0.0254443358

Reverse: hp·h = thm × 39.3014778922

Step-by-Step Example

Start with your value in Horsepower-Hour. For example: 5 hp·h
Multiply by the conversion factor: 5 x 0.0254443358
The result is: 0.127222 thm

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.

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.

Frequently Asked Questions

How many Therm are in 1 Horsepower-Hour?

There are exactly 0.0254443358 Therm in 1 Horsepower-Hour. This means the conversion factor from Horsepower-Hour to Therm is 0.0254443358.

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

The formula to convert Horsepower-Hour to Therm is: thm = hp·h × 0.0254443358. For example, to convert 10 Horsepower-Hour to Therm, you would multiply 10 by 0.0254443358.

What is a Horsepower-Hour?