Convert Horsepower-Hours to Ton of Oil Equivalent
Convert Horsepower-Hours (hp·h) to Ton of Oil Equivalent (toe) instantly and accurately.
Conversion Formula
toe = hp·h × 6.411864760e-5
About Horsepower-Hours
A horsepower-hour (hp·h) is the energy from one mechanical horsepower (745.6999 W) for one hour - exactly 2,684,519.54 J ≈ 2.685 MJ. James Watt coined the horsepower to compare his steam engines with mine horses; billing in hp·h preceded the kilowatt-hour tariff. The metric horsepower (PS = 75 kgf·m/s = 735.499 W) gives a slightly smaller metric-hp·h = 2,647,795 J, used in European and Japanese engine datasheets. Today the hp·h appears in marine engineering logs, mining energy accounting, and vintage industrial equipment. 1 hp·h = 2.6845 MJ = 0.74570 kWh = 641.19 kcal.
About Ton of Oil Equivalent
A ton of oil equivalent (toe) is the IEA standard for comparing primary energy sources - defined as exactly 41.868 GJ (= 10⁷ International Table kcal). IEA World Energy Balances report in Mtoe: global primary energy supply is ~580 EJ ≈ 13,860 Mtoe/year. One tonne of coal equivalent (tce) = 29.307 GJ = 0.7 toe. Natural gas: ~0.9 toe per 1,000 m³; one barrel of crude oil ≈ 0.136 toe. Average EU citizen uses ~3.0-3.5 toe/year for all energy needs. 1 toe = 41.868 GJ = 11.63 MWh = 39.683 MBTU.
Quick Reference Table
| Horsepower-Hours (hp·h) | Ton of Oil Equivalent (toe) |
|---|---|
| 1 hp·h | 6.412 × 10-5 toe |
| 2 hp·h | 0.000128237 toe |
| 5 hp·h | 0.000320593 toe |
| 10 hp·h | 0.000641186 toe |
| 25 hp·h | 0.00160297 toe |
| 50 hp·h | 0.00320593 toe |
| 100 hp·h | 0.00641186 toe |