Gas Mileage Calculator

Distance Driven:
Gas Used:
Price of Gas: in


Gas Mileage: 0.0 MPG 0.0 L/100km
Cost per Distance: $0.00 per Mile $0.00 per km
An image illustrating the step-by-step process of using a Gas Calculator. The image shows a user entering the distance to be traveled and the price of gas into the calculator's input fields. The next step displays the calculator automatically calculating the total cost of gas for the given distance. This image visually guides the user on how to use the Gas Calculator, a useful tool for budgeting and trip planning.

Accurately track your car or fleet's gas mileage with an adjustable mileage calculator to control expenses amidst fluctuating fuel costs. By utilizing actual fill-up data, this calculator provides customized ratings, allowing you to monitor efficiency over time. 

How Gas Mileage Works

Miles per gallon equals the total distance driven divided by gallons used before refueling. By inputting fill-ups you determine:

  • MPG rating
  • Fuel economy
  • Cost per mile

Higher MPG signifies greater fuel efficiency and savings.

Using the Mileage Calculator

Figuring MPG requires 4 inputs per fill-up:

  1. Enter the recent trip distance
  2. Input gallons added
  3. Provide fuel cost
  4. Get MPG rating

For 300 miles driven until adding 12 gallons at $4 per gallon, the result would be:

25 mpg at $0.16 per mile

Do this regularly to monitor trends.

Cost Per Distance Formula

Steps to calculate cost per distance traveled based on gas mileage:

  1. Calculate miles per gallon (MPG)
    • MPG = Miles Driven / Gallons of Gas Used
  2. Determine Gas Price
    • such as $2.50 per gallon
  3. Calculate Cost Per Mile
    • Cost Per Mile = Gas Price / MPG
    • For example:
      • Miles Driven = 300
      • Gallons Used = 12
      • Gas Price = $2.50 per gallon
      • MPG = Miles Driven / Gallons Used = 300 miles / 12 gallons = 25 MPG
      • Cost Per Mile = Gas Price / MPG = $2.50 per gallon / 25 MPG = $0.10 per mile
  4. Cost Per Kilometer
    • Convert cost per mile to per km:
      Cost per km = Cost per mile X 0.621371

So if gas mileage is 25 mpg with $2.50 per gallon gas, then cost is $0.10 per mile driven or $0.062 per kilometer. This usage cost analysis helps guide driving budget planning!

What Impacts MPG?

Key factors influencing MPG ratings include:

  • Vehicle size and age
  • Driving style and speed
  • Trip type: city vs highway
  • Maintenance and tire inflation
  • Regional fuel mix

Control what you can to maximize the economy.

Fleet Analysis

Managing a delivery fleet? Apply mileage monitoring across vehicle models noting:

  • Deviations from EPA estimates
  • Changes over time per vehicle
  • Route and driver variances

Patterns inform fixed-cost budgeting projections.

Frequently Asked Questions (FAQs)

Q1: What is gas mileage?

Gas mileage refers to the distance a vehicle can travel on a certain amount of fuel, usually measured in miles per gallon (MPG).

Q2: How can I improve my gas mileage?

You can improve your gas mileage by maintaining proper tire pressure, driving at steady speeds, avoiding aggressive acceleration and braking, reducing vehicle weight, and keeping up with regular vehicle maintenance.

Q3: What factors can affect gas mileage?

Several factors can affect gas mileage, including vehicle size and weight, driving conditions (such as traffic and road conditions), driving habits, weather conditions, and vehicle maintenance.


With gas prices always in flux, a customizable mileage calculator delivers actionable intelligence for everyday drivers and fleet managers alike by revealing vehicle economy truths in MPG and dollar terms. Making sense of mileage ultimately supports wiser automobile and routing choices!

Read More: Average Fuel Economy by Major Vehicle Category

                     How To Calculate Gas Mileage?