Online Gas Mileage Calculator

Measure your vehicle's real fuel efficiency. Enter distance and fuel used to get MPG (US) or L/100km (metric) for cars, trucks, vans and motorcycles.

Tool Features

• Compute MPG for US units instantly
• Compute L/100km for metric units
• Switch between US and metric with one click
• Responsive design for mobile and desktop
• No registration or software installation

Common Usage

• Track your car's real-world fuel economy
• Compare efficiency after tune-ups or tire changes
• Check a used vehicle's claimed MPG vs actual
• Log mileage for tax or business reimbursement