Horsepower-Hour to Kiloton of TNT Converter

Energy Converter

27 units available

Decimals:

From

To

6.416156e-7

1 hp·h = 6.416156e-7 ktTNT

Formula:

ktTNT = hp·h × 6.416156e-7

With your value: 1 hp·h = 6.416156e-7 ktTNT

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 Kiloton of TNT conversions

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

Horsepower-Hour to Kiloton of TNT Conversion Table

Horsepower-Hour (hp·h)	Kiloton of TNT (ktTNT)
0.5	3.208078e-7
1	6.416156e-7
2	1.283231e-6
5	3.208078e-6
10	6.416156e-6
15	9.624234e-6
20	1.283231e-5
25	1.604039e-5
50	3.208078e-5
100	6.416156e-5
250	0.00016
500	0.000321
1000	0.000642

Kiloton of TNT to Horsepower-Hour Conversion Table

Kiloton of TNT (ktTNT)	Horsepower-Hour (hp·h)
0.5	779,282.836508
1	1,558,565.673016
2	3,117,131.346032
5	7,792,828.36508
10	15,585,656.73016
15	23,378,485.09524
20	31,171,313.46032
25	38,964,141.8254
50	77,928,283.6508
100	155,856,567.3016
250	389,641,418.254
500	779,282,836.508
1000	1,558,565,673.015999

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

Kiloton of TNT (ktTNT)

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 Kiloton of TNT

To convert from Horsepower-Hour (hp·h) to Kiloton of TNT (ktTNT), multiply the value by 6.416156e-7.

Formula: ktTNT = hp·h × 6.416156e-7

Reverse: hp·h = ktTNT × 1,558,565.6730159991

Step-by-Step Example

Start with your value in Horsepower-Hour. For example: 5 hp·h
Multiply by the conversion factor: 5 x 6.416156e-7
The result is: 3.208078e-6 ktTNT

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 Kiloton of TNT

The kiloton of tnt (ktTNT) is a unit of energy and work. One kiloton of tnt equals 4.184000 × 10^+12 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 Kiloton of TNT are in 1 Horsepower-Hour?

There are exactly 6.416156e-7 Kiloton of TNT in 1 Horsepower-Hour. This means the conversion factor from Horsepower-Hour to Kiloton of TNT is 6.416156e-7.

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

The formula to convert Horsepower-Hour to Kiloton of TNT is: ktTNT = hp·h × 6.416156e-7. For example, to convert 10 Horsepower-Hour to Kiloton of TNT, you would multiply 10 by 6.416156e-7.

What is a Horsepower-Hour?