How do I calculate MPG manually?

To calculate MPG manually, divide the number of miles driven by the number of gallons of gas used. For example, if you drove 300 miles and used 10 gallons of gas, your MPG is 30.

A 'good' MPG varies by vehicle type. Generally, 20-25 MPG is average for SUVs, while 30-40+ MPG is considered good for sedans and hybrids. Anything above 50 MPG is excellent.

Mileage Calculator - Calculate MPG, km/L & Fuel Cost

Uses standard US gallon (3.785 L). For imperial gallons (UK), please convert fuel volume first.

How to Use This Mileage Calculator

Calculating your fuel economy is simple with this tool. Just follow these steps:

Enter Distance: Input the total distance traveled (from your trip odometer) into the first box.
Select Distance Unit: Choose between Miles or Kilometers using the dropdown menu.
Enter Fuel Used: Input the exact amount of fuel it took to refill your tank.
Select Fuel Unit: Choose between Gallons (US) or Liters.
Click Calculate: The tool will instantly display your MPG, km/L, and L/100km.
Reset: Use the "Reset" button to clear the form and start over.

Complete Guide to Gas Mileage & Fuel Economy

Whether you are trying to save money on gas, track your vehicle's health, or plan a road trip, understanding your fuel economy is essential. Our calculator helps you instantly determine your MPG (Miles Per Gallon), km/L (Kilometers Per Liter), or fuel consumption in L/100km.

How to Calculate Gas Mileage Manually

If you don't have our calculator handy, you can calculate your gas mileage using a simple formula:

The MPG Formula:
Miles Driven ÷ Gallons of Gas Used = MPG

Step-by-Step Method:

Fill your tank completely and reset your "Trip Odometer" to zero.
Drive as you normally would until your tank is at least half empty.
Refill your tank completely again. Note exactly how many gallons/liters it took to fill up.
Check your Trip Odometer for the distance driven.
Divide the distance by the fuel volume to get your mileage.

Understanding Units: MPG vs. L/100km

Different parts of the world measure fuel efficiency differently:

MPG (Miles Per Gallon): Standard in the United States and UK. A higher number is better (e.g., 40 MPG is better than 20 MPG).
L/100km (Liters per 100 Kilometers): Standard in Canada, Europe, and Australia. This measures fuel consumption. A lower number is better because it means you use less fuel to travel the same distance.

5 Tips to Improve Your Fuel Economy

Want to get more miles out of every gallon? Try these proven tips:

Check Tire Pressure: Under-inflated tires increase rolling resistance and burn more fuel.
Drive Smoothly: Avoid rapid acceleration and hard braking. Highway driving at a steady speed is most efficient.
Reduce Weight: Remove heavy items from your trunk or back seat when not needed.
Use Cruise Control: On highways, cruise control helps maintain a constant speed, saving gas.
Regular Maintenance: Change air filters, spark plugs, and oil on schedule to keep your engine efficient.

Frequently Asked Questions (FAQ)

What is considered "Good" gas mileage?

This depends on the vehicle. For a modern sedan, anything over 30 MPG is good. Hybrids often achieve 45-55 MPG. For large trucks or SUVs, 20-25 MPG is considered respectable.

How do I convert L/100km to MPG?

The conversion is not linear because one measures distance and the other measures consumption. You can use this approximate formula: 235.21 ÷ L/100km = MPG.

Does using the AC lower gas mileage?

Yes, running the air conditioner puts extra load on the engine, which can reduce fuel economy by 10% to 20%, especially in stop-and-go traffic.