⚡ Free Tool
Tyre Pressure
Calculator
Professional per-corner cold starting pressures. Input your conditions and get the exact numbers to set on the gauge — no guesswork.
Tyre Setup
Brand, compound, and tyre condition
sess
0 = brand new, never used
Temperatures
Ambient, track surface, tyre and rim readings
°C
°C
Measure with infrared gun at tarmac level
Cold = sat ≥ 20 min since last session
°C
Pyrometer on the rim before mounting
Fresh air fill — just pumped from bottle / compressor
Fresh compressed air is colder than ambient. As it equalises to rim temperature it expands, reading ~0.04 bar higher than the actual tyre temperature would suggest. When ticked, the calculator automatically subtracts 0.04 bar from each cold pressure target.
Session
Type, laps, and circuit length
laps
m
Track Characteristics
Direction, layout, surface and conditions
Determines which side is the outer (loaded) tyre — outer tyres run lower cold pressure
Driver & Kart
Weight breakdown, CoG, chassis setup and driving style
kg
Driver in full kit + kart + ballast on scales
kg
Driver in race suit, helmet, gloves, boots
cm
Used to estimate seated centre of gravity height
kg
Lead weights on frame / seat struts (floor level)
kg
Scales the inner/outer pressure differential
Hot Target Pressures
Auto-filled per compound — override with your team's own data
🔼 Front Axle — Hot Target
bar
🔽 Rear Axle — Hot Target
bar
Cold Starting Pressures
Set these on the gauge before going on track
— FRONT AXLE —
Front Left
—
bar
Front Right
—
bar
rear axle
Rear Left
—
bar
Rear Right
—
bar
Expected Pressure Build
Front
— bar
Rear
— bar
Key Factors This Session
⚠️ Starting point only. Check hot pressures after the first timed lap and adjust for subsequent sessions. Conditions change — always verify with a pyrometer.