Automotive

Fuel economy, car loans, and vehicle calculations

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Calculate MPG and fuel costs for trips

Calculate auto loan payments and interest

Calculate your car's MPG, L/100km, and trip fuel cost.

All Automotive calculators

Estimate how long a drive will take from distance and average speed, with city, suburban and highway presets plus time for stops.

Estimate vehicle value decline with an explicit bounded depreciation curve and purchase inputs.

Calculate swept engine displacement from bore, stroke, and cylinders.

Calculate vehicle crawl ratio from first-gear and final-drive ratios.

Calculate BMEP from torque, displacement, and explicitly selected engine cycle stroke count.

Calculate measured fuel-to-oil composition from two volumes; no manufacturer mixture ratio is assumed.

Convert measured engine hours to estimated miles using an entered average speed, with no vehicle default.

Estimate e-bike range from explicit battery, usable, reserve, and measured consumption inputs.

Automotive calculators — Frequently asked questions

Quick answers about the automotive tools on Mathify.

What automotive calculators are available?

Fuel economy (MPG), car loan, trip cost, and gas mileage tools.

How is MPG calculated?

MPG divides miles driven by gallons used; metric users see liters per 100 km.

Is the car loan calculator free?

Yes. It estimates monthly payments and total interest at no cost.