0-100 km/h Calculator

How Does the Formula Work?

This calculator gives a rough 0-100 km/h estimate from power, weight and drivetrain. It adds the quarter-mile time from Patrick Hale's 1986 formula and the average G of the run, then places your result among 0-100 times that car makers publish.

A Rough Rule, Not a Measurement

The 1.1 coefficient and the drivetrain factors are this site's own rule of thumb; no published study stands behind them. A real sprint depends on tyres, gearing, traction control, the launch and on how each maker runs its test, so the estimate is for comparing cars rather than for predicting a stopwatch. Under 2.0 seconds the rule no longer means much, and the result reads "≤ 2.0 s". That limit belongs to the rule and not to physics: Rimac publishes 1.81 seconds for the Nevera, a car of 1,914 hp and 2,300 kg, and for those figures the rule drops below its floor.

Power-to-Weight Ratio

Weight divided by power is the only property of the car the rule looks at. A 300 hp car of 1,500 kg has 200 hp per tonne, exactly like a 200 hp car of 1,000 kg, and the rule gives both the same time. The result shows hp/t and kg/hp side by side so you can set them against the figures in a maker's specification.

Quarter Mile

The quarter-mile time (402 metres) comes from Patrick Hale's 1986 formula ET = 5.825 × (weight/hp)^⅓, with the weight in pounds including the driver, and the end speed from his companion formula with the constant 234. Stealth 316, which documents those constants, compared them with Road & Track tests of 243 street cars: the predicted times were quicker than the cars managed, while the speeds matched far better. For the Nevera's published power and weight the formula gives 8.1 seconds; Rimac lists 8.25 seconds over 402 metres.

Average G-Force

Average G is the speed gained, 100 km/h or about 27.8 m/s, divided by the time and by standard gravity, 9.80665 m/s². A run of 3 seconds averages 0.94 G. It is an average across the whole sprint, so the strongest moment is at least that high; the calculator does not try to estimate the peak.

Benchmark Cars

The comparison list holds seven cars whose makers publish a 0-100 km/h time: Rimac Nevera 1.81 s, Tesla Model S Plaid 2.1 s, Porsche 911 Turbo S (2025) 2.5 s, BMW M3 Competition (2020) 3.9 s, VW Golf GTI (2024) 5.9 s, Togg T10X V2 7.5 s and Toyota Corolla 1.8 Hybrid (2023) 9.2 s. Each maker tests its own way, so a tenth or two between them says little; your car is slotted in by its estimated time and highlighted.