Calculate Lap Times
For Any Circuit You Design.
Draw a race circuit on real-world maps and get instant, physics-based lap time estimates for Formula 1, GT3, and MotoGP. Top speed, minimum speed, corner counts, race laps, and a full speed zone visualisation — calculated automatically from the geometry of your track.
How the lap time calculation works.
The calculator measures the curvature of your circuit at every point and derives a maximum cornering speed based on the grip and downforce characteristics of the selected vehicle class. Tighter corners produce lower speed limits. Sweeping curves allow much higher speeds.
Once corner speeds are established, the model applies the acceleration and braking capabilities of the car to build a continuous speed profile across the full lap. This means the lap time accounts for how long it actually takes to slow down into a corner and accelerate back out — not just the theoretical cornering speed.
The results are approximations rather than a full driving simulation. But they are grounded in real vehicle physics and produce numbers that feel right to anyone familiar with motorsport timing data. For a deeper explanation, see how the physics model works.
Every metric a circuit designer needs.
The estimated time it takes to complete one lap of your circuit in the selected vehicle class, calculated from the full speed profile.
The maximum speed reached on the longest straight and the minimum speed at the tightest corner. These define the speed range of your circuit.
The number of distinct corners detected in your layout, measured by changes in curvature that force the car below a threshold speed.
Every segment of the track colour-coded by speed: red for full speed, orange for fast corners, yellow for medium, green for slow. Updates live.
Your circuit rated as Ultra Technical, Technical, Balanced, or High Speed — based on corner density relative to the total lap length.
The number of laps needed to complete the standard race distance for each class: 305 km for F1, 100 km for GT3, 110 km for MotoGP.
Compare lap times across F1, GT3, and MotoGP.
One of the most powerful features of the calculator is switching between vehicle classes on the same circuit. The differences are revealing.
Formula 1 cars generate extreme aerodynamic downforce that increases with speed, making them faster through high-speed sweepers than you might expect. The F1-specific model produces a non-linear speed profile unique to open-wheel racing.
GT3 cars produce less downforce and lower cornering grip, which makes medium-speed corners noticeably slower than in F1. This gives GT3 a different rhythm through the same layout — corners that barely register for an F1 car become significant obstacles.
MotoGP has the lowest cornering grip of all three classes, but an extraordinary power-to-mass ratio that matches F1 for top speed on long straights. The result is dramatic speed variation between corners and straights.