Horsepower-Hour to Ton of TNT Converter

Energy Converter

27 units available

Decimals:

From

To

0.000642

1 hp·h = 0.000642 tTNT

Formula:

tTNT = hp·h × 0.0006416156

With your value: 1 hp·h = 0.00064162 tTNT

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 Ton of TNT conversions

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

Horsepower-Hour to Ton of TNT Conversion Table

Horsepower-Hour (hp·h)	Ton of TNT (tTNT)
0.5	0.000321
1	0.000642
2	0.001283
5	0.003208
10	0.006416
15	0.009624
20	0.012832
25	0.01604
50	0.032081
100	0.064162
250	0.160404
500	0.320808
1000	0.641616

Ton of TNT to Horsepower-Hour Conversion Table

Ton of TNT (tTNT)	Horsepower-Hour (hp·h)
0.5	779.282837
1	1,558.565673
2	3,117.131346
5	7,792.828365
10	15,585.65673
15	23,378.485095
20	31,171.31346
25	38,964.141825
50	77,928.283651
100	155,856.567302
250	389,641.418254
500	779,282.836508
1000	1,558,565.673016

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

Ton of TNT (tTNT)

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 Ton of TNT

To convert from Horsepower-Hour (hp·h) to Ton of TNT (tTNT), multiply the value by 0.0006416156.

Formula: tTNT = hp·h × 0.0006416156

Reverse: hp·h = tTNT × 1,558.565673016

Step-by-Step Example

Start with your value in Horsepower-Hour. For example: 5 hp·h
Multiply by the conversion factor: 5 x 0.0006416156
The result is: 0.003208 tTNT

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 Ton of TNT

The ton of tnt (tTNT) is a unit of energy and work. One ton of tnt equals 4.184000 × 10^+9 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 Ton of TNT are in 1 Horsepower-Hour?

There are exactly 0.0006416156 Ton of TNT in 1 Horsepower-Hour. This means the conversion factor from Horsepower-Hour to Ton of TNT is 0.0006416156.

What is the formula to convert Horsepower-Hour to Ton of TNT?

The formula to convert Horsepower-Hour to Ton of TNT is: tTNT = hp·h × 0.0006416156. For example, to convert 10 Horsepower-Hour to Ton of TNT, you would multiply 10 by 0.0006416156.

What is a Horsepower-Hour?