Automotive calculators
Fuel cost for a trip, MPG ↔ km/l conversion, car depreciation, EV vs petrol payback, and towing-capacity headroom — everything you need to plan a drive or compare cars.
Cost & planning
⛽Fuel cost (trip)
Trip distance × fuel price ÷ mileage = total fuel cost.
🛣️Road trip cost
Fuel + tolls + lodging + food, split by passengers + days.
🔌EV vs petrol
Total cost of ownership comparison — price gap, fuel, charging.
🔋EV trip charging
Cost + stops + time for a long-distance EV drive.
📑Lease vs buy
Monthly + lifetime cost across the same term.
📉Car depreciation
Resale value after N years using straight-line or curve depreciation.
🅿️Parking fine
Penalty + early-discount window + late surcharges.
Converters & engineering
🔄MPG ↔ km/l
Convert US MPG, UK MPG and km/l in any direction.
💪Horsepower ↔ torque
HP ↔ kW, Nm ↔ lb·ft, plus HP from torque + RPM.
⚙️Gear ratio
Final-drive ratio, top speed by gear + RPM, axle-swap impact.
🛞Tyre pressure
PSI ↔ kPa ↔ bar ↔ kg/cm² with recommended pressures.
🚛Towing capacity
Max trailer load minus tongue weight, payload margin.
🌍CO₂ emissions
Tailpipe CO₂ per km / trip / year, EV grid factor included.