Runs on this site · 18 tools
Native tools
Eighteen instruments that live right here — no new tab, no loading screen. For the deep, full-featured jobs, the standalone apps ↗ take over.
Showing 18 of 18 entries
Power-to-Weight Calculator
kg per hp in seconds — the one number that predicts pace better than horsepower alone.
0–100 Time Estimator
Estimate acceleration from power, weight and drivetrain — before you spend on the mod.
Tire Size Comparator
Compare fitments side by side: diameter, speedo error and true speed at a glance.
Braking Distance Estimator
From speed to standstill — surface grip and reaction time factored in.
Fuel Cost Splitter
Split trip fuel fairly between people — settle it before the drive, not after.
Wash Cost per Year
Hand wash, tunnel or DIY — what a year of keeping it clean really costs.
Gear Speed Calculator
Speed at redline per gear, cruise rpm and top speed from your exact gearing.
Cost per Tenth
Price any mod in € per 0.1 s of 0–100. Power against weight, one honest ruler.
Tire Pressure Setup
Hot target in, cold setting out. Stop guessing pressures in the paddock.
Session Fuel Planner
Litres per session and sessions per tank, before you leave home.
Air Density & Power
What today's heat, altitude and humidity really cost in horsepower.
Parked Battery Countdown
How many days your car can sit before a risky start. Storage, decoded.
Test Drive Check
25 checks scored live at the viewing. Risk score, red flags, negotiation list.
True Cost of Ownership
The honest euros per month, depreciation included, method shown.
Driving Position Setup
The seven-step seat ritual racing schools teach, tapped through in the car.
Spring Rate Calculator
Ride-frequency method with motion ratio. The engineering, metric first.
Helmet & Gear Check
Your certification against typical 2026 organizer rules, in ten seconds.
Tread Depth Estimator
Usable tread left and km remaining, against the threshold that matters.
Beyond quick math
The big jobs have their own apps
Track day budgets, build analysis, pad matching, price checks — seven standalone apps, each on its own domain, each free.