Calculation of engine power
Approximate vehicle power by weight and acceleration time 0-100 km/h
to find out the approximate power of the car
Engine power over acceleration
🏎️ Find out the real power, not the nameplate
Factory specifications often do not coincide with reality - engines wear out, and tuning changes parameters. Our algorithm uses the laws of physics (Newton's Second Law) to calculate power based on acceleration dynamics.
- Find out the exact weight of the car (preferably with the driver).
- Measure the real time acceleration 0-100 km/h (it is better to use GPS, not a speedometer).
- Select drive and fuel type.
In what situations is this useful?
🛠️ After chip tuning (Stage 1/2)
Did the firmware promise +50 horsepower? Measure the acceleration “before” and “after” to find out whether you were deceived and what the real gain is.
🚗 When buying a used car
If the car according to its passport should drive for 8 seconds, but it does for 12, the engine has lost compression or there are problems with fuel system. The calculator will show how many “horses” ran away.
📊 To convert units
The system will automatically provide the result in two formats. If you need to convert the values separately, use our horsepower to kW converter.
Frequently asked questions (FAQ)
🔹 Why is the result lower than in the PTS?
The PTS indicates power at the engine flywheel (bench tests). On the road, some of the power is “eaten up” by the transmission, tire friction and aerodynamics. Our calculator shows the real efficiency of a car on the road (Wheel Horsepower).
🔹 What is the most accurate way to measure acceleration?
Do not use a stopwatch on your phone - the error in human reaction is too large. The best results will be obtained by GPS devices (Draggy, Racelogic) or OBD2 scanners connected to the “brains” of the car.
🔹 Why is the calculation different for electric cars?
Electric motors have an efficiency of 90-95%, and torque is available from 0 revolutions. Gasoline engines spend a lot of energy on heat and friction (efficiency is about 30-40%), so the calculation formulas for them are different.