Free online car & vehicle calculators
Ten instant car and vehicle calculators that run entirely in your browser. No signup, no upload, no ads.
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Fuel Economy Calculator
Calculate fuel economy in MPG and L/100km from distance driven and fuel used. Works with miles/gallons or km/litres.
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MPG ↔ L/100km Converter
Convert miles per gallon (US or Imperial) to litres per 100 km and back. Instant two-way conversion.
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Trip Fuel Cost Calculator
Calculate how much fuel your trip will cost. Enter distance, fuel economy, and price per litre or gallon.
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Parking Fee Calculator
Calculate parking fees from hourly rates with optional daily cap. Enter rate and duration to see total cost.
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Road Trip Budget Planner
Plan your road trip budget covering fuel, food, lodging, and other daily expenses for full trip estimate.
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Tire Size Converter
Decode tire sizes like 205/55R16 to actual diameter, section width, sidewall height, and circumference.
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Oil Change Cost Estimator
Estimate oil change costs for DIY and shop service. Compare conventional, synthetic blend, and full synthetic.
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Car Depreciation Estimator
Estimate your car's value after 1–10 years using declining-balance depreciation with an annual rate.
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EV Charging Cost Calculator
Calculate electric vehicle charging costs for home and public stations. Enter battery size, rate, and efficiency.
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License Plate Format Reference
Look up license plate formats for US states and countries. Shows format, character count, and example plates.
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Why use car calculators?
Every calculator here runs entirely inside your browser — no server round trips, no account needed. Results are instant and your vehicle data never leaves your device. From fuel economy and trip costs to EV charging and tire sizing, these tools cover the most common calculations for everyday drivers, road-trippers, and car enthusiasts.