Mechanical horsepower.
Horsepowers to Decawatts Converter — hp to daW
Convert Horsepower (hp) to Decawatt (daW) using the exact conversion factor (1 horsepower = 74.56998716 decawatt). See the formula, worked examples, conversion table, history, and common uses.
Horsepowers to Decawatts converter
Converter
Engineering Converter
Convert common stress, force, torque, power, and energy units used in engineering.
Context values
Some unit families need one extra value for a physically accurate result.
Decawatt is 10 watt units.
Result = input x 745.6998716 / 10.
Power units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Horsepowers to Decawatts
Horsepower and Decawatt both measure a quantity used in structural or mechanical engineering — commonly stress, pressure, force, torque, power, or energy — where converting between the unit conventions used in different regions, industries, or equipment specifications is a routine part of design work. Horsepower is most often used for us and uk vehicle engine power ratings.
Formula
decawatts = horsepowers × 74.5699871582
This factor comes from each unit's defined relationship to the category's base unit: 1 horsepower equals 745.699871582 base units, and 1 decawatt equals 10 base units, so dividing one by the other gives the direct horsepower-to-decawatt factor of 74.5699871582.
Simple example
1 hp × 74.56998716 = 74.56998716 daW
1 horsepower = 74.56998716 decawatts.
Real-world example
100 hp × 74.56998716 = 7,456.998716 daW
100 horsepowers = 7,456.998716 decawatts.
Conversion table
| Horsepower (hp) | Decawatt (daW) |
|---|---|
| 1 hp | 74.56998716 daW |
| 10 hp | 745.6998716 daW |
| 50 hp | 3,728.499358 daW |
| 100 hp | 7,456.998716 daW |
| 500 hp | 37,284.99358 daW |
| 1,000 hp | 74,569.98716 daW |
Reverse conversion: Decawatt to Horsepower
74.56998716 daW × 0.0134102209 = 1 hp
74.56998716 decawatts = 1 horsepowers.
horsepowers = decawatts × 0.013410220896
For a page dedicated to this direction, see Decawatt to Horsepower.
Understanding the Horsepower
Horsepower (hp) measures power. Mechanical horsepower is defined as exactly 745.6998715822702 watts. It is classified as a US/imperial customary unit.
Where it's used: United States and United Kingdom (vehicle and engine specifications)
Mechanical horsepower vs. metric horsepower. Mechanical horsepower (745.7 W) and metric horsepower/PS (735.5 W) differ by about 1.4% — a US car spec sheet in 'hp' and a European one in 'PS' are not directly comparable numbers without conversion.
Uses of the Horsepower today
- US and UK vehicle engine power ratings
- Motor and engine specifications in English-speaking markets
History of the Horsepower
James Watt popularized horsepower in the 1780s as a marketing figure, comparing his steam engines' output to the working capacity of a horse (based on his estimate of a horse turning a mill), so buyers could grasp engine capability in familiar terms. The unit stuck long after its origin as a sales tool, eventually being formally defined at exactly 550 foot-pounds per second.
Historical origin. Horsepower was not the invention of a single named person; it developed through the process described above.
Understanding the Decawatt (daW)
Decawatt is 10 watt units.
Horsepower — sources
- NIST Special Publication 811 — Documents the exact watt-equivalence of mechanical horsepower.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many decawatts are in 1 horsepower?
1 horsepower equals 74.56998716 decawatts, using the exact defined conversion factor rather than an estimate.
How do I convert horsepower to decawatt?
Multiply the horsepower value by 74.56998716. The converter above does this instantly to whatever precision you set.
How do I convert decawatt back to horsepower?
Use the reverse factor: 1 decawatt equals 0.0134102209 horsepowers. You can also use the swap control in the converter above to flip the direction instantly.
What is a horsepower?
Horsepower (hp) measures power. Mechanical horsepower is defined as exactly 745.6998715822702 watts. It is classified as a US/imperial customary unit.
What is a decawatt?
Decawatt (daW) is a unit of engineering.
Is the horsepower to decawatt conversion exact?
Yes. Mechanical horsepower is defined as exactly 745.6998715822702 watts. That fixed definition is what the converter above uses, so any rounding you see is a display choice, not a limitation of the math.
What is the difference between mechanical horsepower vs. metric horsepower?
Mechanical horsepower (745.7 W) and metric horsepower/PS (735.5 W) differ by about 1.4% — a US car spec sheet in 'hp' and a European one in 'PS' are not directly comparable numbers without conversion.
Where is the horsepower still used today?
United States and United Kingdom (vehicle and engine specifications)