Example 1
- Direction: kW to HP
- Power 100
134.10 hp
How many hp is 100 kW? 134.10 mechanical hp, because 100 × 1000 / 745.6998715822702. Metric KM is 135.96.
kW to HP
The calculator multiplies power in kilowatts by 1000 and divides by 745.6998715822702. 100 kW is 134.10 mechanical hp. The same 100 kW is 135.96 metric KM.
This is not kilometers. Distance is on the km to miles page. Force from engine power is on F = P/v.
Result
Enter a power value. The conversion to hp and KM appears here.
How it works
The calculator converts power among kilowatts, mechanical horsepower, and metric KM. 100 kW times 1000, divided by 745.6998715822702, is 134.10 hp. The same 100 kW divided by 735.49875 is 135.96 KM.
US listings use mechanical hp, not metric KM. The gap is about 1.4%. 75 kW is 100.58 hp and 101.97 KM. A sign that says 1 kW = 1.34 hp is a rounding.
In the other direction, 200 hp times 745.6998715822702, divided by 1000, is 149.14 kW. 150 metric KM times 735.49875, divided by 1000, is 110.32 kW.
KM on this page means metric horsepower, not kilometers. Distance is on the km-to-miles page. Force from power and speed is on F = P/v.
A comma and a period are the same number. Zero gives zero. The calculator does not accept a negative number. The converter does not read a registration file.
This is not a dynamometer and not an engine rating. Compare the result with the number on the sheet, not with a 1.34 rounding.
Formula
hp = kW × 1000 / 745.6998715822702
Metric KM = kW × 1000 / 735.49875. The other way, kW = hp × 745.6998715822702 / 1000, or kW = KM × 735.49875 / 1000.
How to use it
- Enter the power, for example 100.
- Choose kW to HP when the number comes from a kilowatt rating.
- 100 kW is 134.10 mechanical hp. Metric KM sits beside it at 135.96.
- When you have hp from a US listing, choose hp to kW. 200 hp is 149.14 kW.
- This is not kilometers. Open km to miles for distance.
134.10 hp from 100 kW
The calculator multiplies kilowatts by 1000 and divides by 745.6998715822702. 100 kW is 134.10 hp.
- kW
- Kilowatt: 1000 watts. 100 kW is 134.10 hp and 135.96 KM.
- hp
- Mechanical horsepower: 745.70 W. US listings use this. 100 kW is 134.10 hp.
- KM
- Metric horsepower: 735.49875 W. European car ads. This is not a kilometer.
Examples
Example 2
- Direction: hp to kW
- Power 200
149.14 kW
200 hp × 745.6998715822702 / 1000 is 149.14 kW.
Example 3
- Direction: kW to HP
- Power 75
100.58 hp
75 kW × 1000 / 745.6998715822702 is 100.58 hp. The metric figure is 101.97 KM.
Related calculators
Frequently asked questions
How many hp is 100 kW?
134.10 mechanical horsepower. The calculator multiplies 100 by 1000 and divides by 745.6998715822702. The same 100 kW is 135.96 metric KM.
Are hp and metric KM the same?
No. Mechanical hp is 745.70 W. Metric KM is 735.49875 W. The gap is about 1.4%. US listings use hp.
How many kW is 200 hp?
149.14 kW. The calculator multiplies 200 by 745.6998715822702 and divides by 1000.
Is 1 kW equal to 1.34 hp?
That is a rounding. The exact factor is 1000 / 745.6998715822702, about 1.34102. 100 kW is 134.10 hp, not 134.
Is this kilometers?
No. This page converts power. Kilometers to miles is a separate converter. KM here means metric horsepower.
Does this read a VIN or a dyno sheet?
No. The calculator uses only the number you type. It does not open a registration file.
Is this force from engine power?
No. F = P/v is on the physics page. This page only converts power units.
Does a comma in 75,5 work like a period?
Yes. 75,5 and 75.5 are the same number. Avoid thousand separators inside the number.
Does zero work?
Yes. Zero kilowatts gives zero hp and zero KM. The calculator does not accept a negative number.
Where does 745.70 W come from?
Mechanical horsepower is 550 foot-pounds per second. Metric KM is 75 kilogram-force metres per second.
Sources
Metric horsepower is 735.49875 W. Mechanical hp is 550 foot-pounds per second.
Page updated in 2026.