Runs on this site · 25 tools
Native tools
Twenty-five instruments that live right here — no new tab, no loading screen. New this month: the Tow & Load and EV Energy clusters. For the deep, full-featured jobs, the standalone apps ↗ take over.
Showing 25 of 25 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.
Tow Match
Outfit ratio, towing limit, train weight, noseweight, licence and speed for six countries, one screen.
Noseweight & Rack Load
The 5–7 % window for the caravan, and how many bikes the towball can carry.
Payload Remaining
MAM minus kerb, people, luggage, roof box and noseweight, with the 75 kg driver made explicit.
EV Charge Time
Minutes from X to Y % with the car's own limit and a visible DC taper.
Charging Cost per 100 km
Home, off-peak, public and the blend, losses counted, plus the petrol price that would match it.
EV Range Reality
Rated range × temperature × speed × load, every multiplier shown, sourced and editable.
EV vs ICE Breakeven
Two cars over N years with depreciation and opportunity cost on screen, and the year they cross.
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.