0-60 Time Calculator
Get a ballpark 0-60 mph time from a car's power (hp or kW), weight (lb or kg), and drivetrain. It is a physics estimate built on power-to-weight, not a measured track figure, so treat the result as a rough guide.
Example: with Engine power 300 · Power unit hp · Vehicle weight 3500 · Weight unit lb · Drivetrain / launch RWD (typical) → Estimated 0-60 mph: ≈ 5.7 s.
- Power-to-weight0.086 hp/lb
- How that feelsQuick / sporty
Computed by the calculator below using its default values. Change any input to see your own numbers.
This estimate comes from power-to-weight, not a dyno or a stopwatch. Two cars with identical numbers can differ by a second depending on tires, gearing and launch.
How the estimate works
Reaching 60 mph means giving the car a fixed amount of kinetic energy: one-half times mass times velocity squared. If the engine could pour every watt of peak power straight into that energy the whole time, the minimum time would be that energy divided by power. Real cars cannot - the engine is only near peak power for part of the run, tires slip, and the drivetrain wastes some torque. This tool multiplies peak power by an assumed utilization fraction (about 0.40 for front-drive, 0.45 for rear-drive, 0.52 for all-wheel drive) to land in a realistic range.
The result tracks power-to-weight closely: double the specific power and the time roughly halves. That is the honest core of the number, and it is why light, powerful cars win.
Why it is only a ballpark
Published 0-60 times depend on launch technique, tire compound and temperature, gearing, aerodynamic drag, altitude, and even how rollout is measured. Those variables can swing a real time by a second or more. Use this figure to compare builds and set expectations, not to settle a bet - for that you need a track, a timing box, and a good day.
How it’s calculated
Estimated 0-60 mph time t = (1/2 x m x v^2) / (P x u), with v = 26.8224 m/s (60 mph), m in kilograms, and P peak power in watts (1 hp = 745.699872 W). u is an assumed average power-utilization fraction: 0.40 FWD, 0.45 RWD, 0.52 AWD. Power-to-weight shown as hp/lb.
This is a physics estimate from power-to-weight, not a measured time. It assumes an average fraction of peak power reaches the road; real launches depend on tires, traction, gearing, aero and driver, so treat it as a ballpark.
Rough 0-60 by power-to-weight (RWD assumption)
| Power-to-weight | Example | Rough 0-60 |
|---|---|---|
| 0.04 hp/lb | Economy commuter | ~12 s |
| 0.07 hp/lb | Warm hatch / SUV | ~7 s |
| 0.10 hp/lb | Hot hatch | ~4.9 s |
| 0.14 hp/lb | Sports car | ~3.5 s |
| 0.20 hp/lb | Supercar | ~2.4 s |
Computed with t = (1/2)mv^2 / (P x 0.45) at 60 mph; W/kg = hp/lb x 1,644. A rough model, not measured times.
Common mistakes
- Treating the output as a dyno-verified time; it is a power-to-weight estimate only.
- Entering wheel horsepower and expecting factory 0-60 claims, which use crank power.
- Ignoring drivetrain - an AWD launch can beat an equal-power RWD car by a second off the line.
- Forgetting to add driver and fuel weight, which can be 200 lb the brochure ignored.
Frequently asked questions
How is 0-60 estimated from horsepower and weight?
The tool finds the kinetic energy needed to reach 60 mph, then divides it by peak power times an assumed utilization fraction (0.40-0.52 by drivetrain). In short, it is a power-to-weight model, so lighter and more powerful means quicker.
Is this the same as a real tested 0-60 time?
No. It is a physics ballpark. Actual times depend on tires, launch, gearing, aero and conditions and can differ by a second or more, which is why we label it rough.
Why does drivetrain change the estimate?
All-wheel drive puts power down with less wheelspin, so more of the engine's output actually accelerates the car. The tool models that with a higher utilization fraction for AWD than for FWD or RWD.
Should I use crank or wheel horsepower?
Use crank horsepower to match how manufacturers quote 0-60. If you only have wheel horsepower, the estimate will read a bit slower because it does not add back drivetrain loss.
Why is my result slower than the brochure?
Manufacturers use ideal launches, sticky tires and sometimes one-foot rollout. This model assumes an average launch, so a small gap is expected.