How many stops, and can you make it one fewer?

Put in the race length, your lap time and your fuel numbers, and this works out your stints and stops — plus the bit that actually wins endurance races: exactly how much fuel you'd have to save to drop a stop, and how close you are to being forced into an extra one.

Endurance · Strategy Tool

Fuel & Stint Calculator

Everything updates as you type. Nothing is sent anywhere — it all runs in your browser.

Race started (your time) Full length h m

Race length h m Average lap time m:ss.s Fuel per lap gal Car optional · fills the tank size Tank capacity gal BoP fuel cut optional % smaller Reserve kept in tank laps Pit lap time optional · line to line m:ss.s Formation lap optional · fuel burned gal Tyre life optional laps

Race distance

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Pit stops

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Stints

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Total fuel

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Where you sit on fuel

To save a stop

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You are using

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An extra stop at

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What each stop count needs

Stops	Stints	Laps per stint	Fuel per lap needed	vs your pace

The stint plan

Stint	Laps	Race laps	Starts at	Duration	Fuel in	Elapsed at stop

The detail

How the stop count works. A stint is limited by whichever runs out first — fuel or tyres. Laps per stint is whole laps on a usable tank (capacity minus your reserve), so stops only change when that whole number changes. That's why the fuel-saving target is often much closer than it feels: shaving a few hundredths per lap can be worth a whole pit stop, or nothing at all.

Timed races assume you take the flag and complete the lap you're on, so the lap count is rounded up. Fuel figures include your reserve, so the tank should still have that much left when you cross the line.