Fuel calculator

Load the fuel your race needs.

Type the race length. Apex Racing reads the burn of your own laps on this car and track, adds a safety margin and one extra lap, and gives you one number to put in the car.

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30 days free, no card F1 25, iRacing, LMU, AMS2 Windows 10 and 11

Monza (2020) Automobilista 2 · your laps in 19 sessions Porsche 992 GT3 R · 50 of 152 clean laps counted

Fuel per lap, one dot per clean lap.

Counted Older than the newest 50 No fuel used

3.0 L 3.1 L 3.2 L 3.3 L 3.4 L 0 L Newest 50 laps · the card reads these 19 time trial laps, no fuel used

11 Apr26 laps 29 Oct52 laps 1 Nov74 laps

The card on the practice of 29 Oct reads the newest 50: 41 from the race of 1 Nov and 9 from the two qualifyings before it. Burn 3.22 ± 0.04 L per lap.

Fuel to load from linked race

14minat1:48.8

29.2L 8 laps

25.8 race + 0.2 safety + 3.2 extra · fits 100 L tank

50 laps · Porsche 992 GT3 R - Low Downforce · 2 days ago

Computed

8 laps × 3.22 L = 25.8 L, plus 1.645 × 0.037 L × √8 = 0.2 L safety, plus 1 lap of 3.22 L.

How much fuel do I load?

Race, safety and one extra lap.

The load is the race laps times your burn per lap, plus a safety for the spread of your burn, plus one lap. The number changes as you type.

RaceLoad against the 100 L tankFuel to load

14 min 8 laps · the linked race of 29 Oct

Tank 100 L

29.2 L70.8 L left in the tank

30 min 17 laps at 1:48.8

58.3 L41.7 L left in the tank

45 min 25 laps at 1:48.8

84.1 L15.9 L left in the tank

29 laps typed in laps

97.0 L3.0 L left in the tank

30 laps typed in laps

100.3 L0.3 L over: 1 stop

Race: laps × burn Safety: 1.645 × spread × √laps Extra: 1 lap Tank, recorded by the game

A timed race runs one lap more

The clock ends during a lap, and you finish that lap. The card counts the minutes over your median lap, plus one.

14 min at 1:48.8: 8 laps

Safety from your spread

1.645 × the spread of your burn × √laps. 95 of 100 races finish with fuel left, and a long race gets no more than it needs.

Spread ±0.037 L: 0.2 L for 8 laps, 0.3 L for 30

One extra lap

One lap of fuel for the formation lap and the cool-down lap. Open more to change it.

Here: 3.22 L

Which laps does it read?

Your newest 50 clean laps on this car and track.

The burn belongs to the car on the track, not to one session. So the card reads your clean laps from all your sessions on the same game, track and layout.

One cell per lap, newest first

Counted Older than the newest 50 No fuel used Not clean

1 Novrace

41 of 41

1 Novqualifying

4 of 4

1 Novqualifying

5 of 6

1 Nov3 practices

0 of 23

29 Oct2 practices, qualifying, race

0 of 52

11 Aprtime trials to race

0 of 26

Not read16 not valid, 11 not clean

0 of 27

How the count goes

179 All your laps here19 sessions on this car and track

−16 Not valid or not timed

−11 Not cleana pit stop, a red flag, an out or in lap

152 Clean laps with a fuel value

−102 Older than the newest 50game patches change the burn

50 Countedno refuel, no outlier

3.22 Lper lap, spread ±0.04 L, median lap 1:48.8

All your sessions

Practice, qualifying and race laps all count. Laps with a pit stop or a red flag do not. The card also drops an outlier lap.

Here: 152 clean laps in 19 sessions

The exact car, else the class

The exact car counts from 5 clean laps. With fewer, the card reads the laps of the car class and shows a CLASS tag.

Here: the exact car, 50 laps

Only the newest 50

A game patch can change the burn. The card reads the newest 50 laps, and the source line says how old the newest one is.

Newest lap: race of 1 Nov, 2 days ago

Does it fit in the tank?

A tank check, and soon an energy check.

The load shows in the unit that the game uses. When the game records the tank size, the card compares the load with the tank. Cars on virtual energy get the same check for the energy.

Game	Unit	Tank check
Automobilista 2	L% L with a recorded tank, else % of a full tank	When the tank is recorded
Le Mans Ultimate	L% L, and soon virtual energy in %	Yes
F1 25	kg	Yes
iRacing	L	No: no tank size

Virtual energy Coming soon

10laps

75.3% energy to start

Energy Fuel, 90 L tank 1 lap reserve

Lap 13: energy
ends the stint Fuel lasts 30 laps

100 % 0

0 10 20 30

ClassEnergyFuelStint Hypercar6.8 %2.9 L 13 laps, energy LMGT34.3 %4.6 L 20 laps, fuel

Example. Le Mans Ultimate, per lap.

The unit of the game

AMS2 sends a share of the tank. With the tank size from the game, the card turns it into litres.

Porsche 992 GT3 R: 100 L tank, recorded

A red number when it does not fit

The card says how far over the tank the load is and how many stops the race needs at least.

30 laps: 100.3 L, 0.3 L over, 1 stop

Virtual energyComing soon

Le Mans Ultimate gives Hypercars and LMGT3 cars an energy allowance per stint. The card will give the energy to start with, and the stint ends at the energy or the fuel, whichever ends first.

Example: Hypercar, 6.8 % per lap: 13 laps

Can I save a stop?

Lift a little, or carry less fuel.

A stop costs time in the pit lane, and each litre in the car costs time on each lap. Soon the card shows both costs next to the load.

Fuel to load for 30 laps Porsche 992 GT3 R · Monza (2020)

Coming soon

Lift and coast 0 m 50 m 100 m 150 m

Tank 100 L 100.3 L 98.6 L 96.6 L 94.2 L

Burn per lap 3.22 L 3.17 L 3.10 L 3.03 L

Lap time ±0.00 s +0.10 s +0.22 s +0.37 s

Race of 30 laps +123 s 1 stop +3.0 s no stop +6.6 s no stop +11.1 s no stop

Example. The app does not compute lift and coast yet. The stop uses your measured pit loss of 123 s.

Fuel weight Coming soon

+0.022s per lap, per litre

+0.03 s per kg, at 0.74 kg per litre.

58 L, a 60 min start: +1.3 s +2.2 s

0 L 100 L in the car

1 extra lap,3.22 Lcosts+0.07 sper lap

Over a 15-lap stint:+1.1 s

3 extra laps, 9.7 L:+0.21 sper lap,+3.2 s

Example. A typical GT3 value.

Lift and coastComing soon

Lift off the throttle before the braking point and let the car roll. The car burns less fuel and loses a little time on each lap.

Example: 50 m per lap, 98.6 L, no stop in 30 laps

The weight of the fuelComing soon

Each litre in the car makes each lap slower. The Strategy model fits this cost from your own laps. The card will show it for the extra laps.

Example, a typical GT3: +0.022 s per litre

The stops, planned

The Strategy section of the Practice tab plans the stops. In your AI chat, the MCP tools give the same burn and a plan per stop.

30 laps, stop after lap 15: add 48.4 L

What it needs

Before your first fuel number

A practice session

The card is the third card of the Practice tab, on practice and time trial sessions.

3 clean laps with fuel use on

p0 records the fuel of each lap. A session with fuel use off shows no estimate.

A tank size for the check

AMS2, LMU and F1 25 record the tank. iRacing does not, so the card shows no tank check there.

F1: standard mix

In F1 25 only laps on the standard fuel mix count. With none, all mixes count and the card shows ALL MIXES.

Your first fuel number 8 laps · 29.2 L for 14 min

Finish with fuel left.

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