Use this free Mileage Calculator to estimate fuel cost, MPG, miles per gallon, cost per mile, trip cost, and mileage reimbursement. Enter your distance, fuel price, fuel efficiency, or mileage rate to calculate travel costs for work, commuting, road trips, deliveries, and business mileage.
This tool can help you calculate fuel mileage, compare vehicle fuel economy, estimate road trip costs, and work out mileage reimbursement using your own rate.
Finance Calculators
Mileage Calculator Tool
Estimate fuel cost, MPG, trip cost, cost per mile, reimbursement, road trip totals, and vehicle savings.
Quick Presets
Example values only. Change them to match your own vehicle, route, fuel price, or mileage policy.
Calculator Tools
Choose a tool. Results update as you type.
Trip Fuel Cost Calculator
Estimate fuel used, trip cost, and cost per mile or kilometre.
Fuel cost result
LiveEnter distance, efficiency, and fuel price to calculate.
MPG Calculator
Convert distance and fuel used into MPG, km/L, and L/100km.
Efficiency result
LiveEnter distance and fuel used to calculate.
Cost Per Mile Calculator
Find fuel cost per mile and per kilometre from a total cost.
Unit cost result
LiveEnter total cost and distance to calculate.
Mileage Reimbursement Calculator
Estimate a business mileage claim using your own rate.
Reimbursement result
LiveUse the rate provided by your employer, accountant, tax authority, or company policy.
Enter business miles and your chosen rate to calculate.
Road Trip Planner
Plan one trip or repeated trips with fuel, parking, and toll estimates.
Road trip result
LiveAdjust trip count, distance, and optional costs to test scenarios.
Comparison / What-if Tool
Compare two vehicles or two fuel efficiency values over the same distance.
Comparison result
LiveEnter two efficiency values to compare fuel cost.
Copy / Save / Reset
Save inputs and recent scenarios locally in this browser.
Ready. Change any value to update the estimate.
Recent calculations
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- No recent calculations saved yet.
Common Mileage Formula Box
- Fuel cost = fuel used × fuel price
- MPG = miles driven ÷ gallons used
- Cost per mile = total cost ÷ miles
- Reimbursement = business miles × rate
Disclaimer
Results are estimates for general planning only. Fuel prices, vehicle efficiency, mileage rates, tax rules, employer policies, and real driving conditions can vary. For official reimbursement, tax, or business expense decisions, check your employer, accountant, or relevant authority.
What Is a Mileage Calculator?
A Mileage Calculator helps estimate the cost, distance, fuel use, and reimbursement value of a journey. It is useful for drivers, commuters, delivery workers, freelancers, employees, business owners, and anyone planning a trip by car.
You can use this calculator to check fuel cost, miles per gallon, cost per mile, business mileage claim estimates, and total road trip cost.
How to Use the Mileage Calculator
To calculate your mileage or trip cost, enter the details you know. Depending on what you want to calculate, you can use distance, fuel price, MPG, litres, gallons, or reimbursement rate.
For example, you can:
- Calculate fuel cost for a journey
- Calculate MPG from miles driven and fuel used
- Estimate cost per mile
- Work out mileage reimbursement
- Compare two vehicles
- Estimate total road trip cost
- Convert mileage between miles and kilometres
The calculator gives instant estimates, so you can test different fuel prices, distances, and vehicle efficiency values.
Fuel Cost Calculator
The fuel cost section estimates how much you may spend on petrol, diesel, or fuel for a trip.
The basic idea is:
Fuel cost = fuel used × fuel price
If your vehicle uses more fuel, the total cost will be higher. If your fuel efficiency is better, your cost per mile will usually be lower.
This is useful for:
- Daily commuting
- Long-distance driving
- Road trips
- Delivery work
- Business travel
- Estimating travel expenses
- Comparing journey costs
Miles Per Gallon Calculator
The Miles Per Gallon Calculator helps you calculate MPG using distance driven and fuel used.
MPG means miles per gallon. It shows how many miles your vehicle can travel using one gallon of fuel.
A higher MPG usually means better fuel economy. A lower MPG usually means the vehicle uses more fuel for the same distance.
Example:
If you drive 350 miles and use 10 gallons of fuel:
350 ÷ 10 = 35 MPG
So your vehicle’s fuel economy is 35 miles per gallon.
Calculate MPG
To calculate MPG, divide the number of miles driven by the number of gallons used.
Formula:
MPG = miles driven ÷ gallons used
If your fuel amount is entered in litres, the calculator can convert it into gallons before estimating miles per gallon.
This is helpful if you want to check your real-world fuel economy instead of relying only on the number shown by your vehicle.
Fuel Economy Calculator
A Fuel Economy Calculator helps compare how efficiently a vehicle uses fuel. Fuel economy can be shown in different ways, including:
- MPG
- km/L
- L/100km
MPG is common in miles-based systems. km/L shows how many kilometres a vehicle travels per litre. L/100km shows how many litres are used per 100 kilometres.
Lower L/100km usually means better fuel economy. Higher MPG or km/L usually means better fuel economy.
Cost Per Mile Calculator
Cost per mile helps you understand how much each mile costs based on fuel spending.
Formula:
Cost per mile = total fuel cost ÷ total miles
Example:
If a trip costs £30 in fuel and the distance is 150 miles:
£30 ÷ 150 = £0.20 per mile
This is useful for delivery drivers, business travel, freelancers, vehicle budgeting, and comparing driving costs.
Mileage Reimbursement Calculator
The Mileage Reimbursement Calculator estimates how much you may be able to claim for business miles using your own mileage rate.
Formula:
Mileage reimbursement = business miles × rate per mile
Example:
If you drove 100 business miles and your mileage rate is £0.45 per mile:
100 × £0.45 = £45.00
Use the rate provided by your employer, accountant, tax authority, or company policy. This calculator does not provide official tax advice and does not guarantee any reimbursement amount.
Business Mileage Calculator
A Business Mileage Calculator can help estimate travel claims for work-related journeys. This may include client visits, site visits, business meetings, deliveries, or work travel.
You can enter your business miles and mileage rate to estimate a claim amount. If you also track personal miles, you can compare business and personal travel more clearly.
For official business expense records, always check your employer policy, accountant, or relevant authority.
Road Trip Cost Calculator
The road trip section helps estimate total journey cost by combining distance, fuel efficiency, fuel price, and optional extras such as parking or tolls.
This is useful when planning:
- Weekend trips
- Family travel
- Airport runs
- Long-distance journeys
- Multi-trip routes
- Delivery routes
- Business travel
You can test one-way trips, round trips, and multiple journeys to see how the total cost changes.
Mileage Calculator for Work
If you drive for work, mileage costs can add up quickly. A mileage calculator helps you estimate the real cost of travel before or after a journey.
It can be useful for:
- Employees
- Contractors
- Delivery drivers
- Sales workers
- Mobile workers
- Small business owners
- Self-employed drivers
You can calculate fuel costs, cost per mile, and mileage reimbursement in one place.
Mileage Converter: Miles and Kilometres
Mileage can be measured in miles or kilometres. This calculator can help with both.
Common conversions:
1 mile = 1.609344 kilometres
1 kilometre = 0.621371 miles
This is useful if your distance is shown in kilometres but your fuel economy is based on MPG, or if your journey is shown in miles but your fuel price is entered per litre.
Why Fuel Mileage Can Change
Your real mileage and fuel economy may change depending on driving conditions.
Fuel use can be affected by:
- Traffic
- Speed
- Weather
- Tyre pressure
- Vehicle weight
- Driving style
- Road type
- Engine condition
- Air conditioning use
- City driving vs motorway driving
Because of this, the calculator should be used as an estimate, not a guaranteed fuel cost.
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Use finance calculators to estimate costs, payments, percentages, savings, salary, and other money-related figures.
Salary Calculator
A salary calculator can help estimate earnings, hourly pay, monthly pay, or yearly income. It is useful if you are comparing mileage costs with work income.
Time to Decimal Calculator
Use a time to decimal calculator if you need to convert work hours into decimal hours for timesheets, payroll, invoices, or billing.
Percentage Calculator
A percentage calculator can help calculate increases, decreases, discounts, fuel price changes, savings, and cost comparisons.
Frequently Asked Questions
What is a Mileage Calculator?
A Mileage Calculator estimates fuel cost, MPG, cost per mile, trip cost, and mileage reimbursement using distance, fuel price, fuel efficiency, and mileage rate.
How do I calculate mileage?
Mileage can be calculated in different ways. For MPG, divide miles driven by gallons used. For reimbursement, multiply business miles by the mileage rate.
How do I calculate MPG?
MPG is calculated by dividing miles driven by gallons used.
Formula:
MPG = miles driven ÷ gallons used
What is a good MPG?
A good MPG depends on the type of vehicle, engine, driving conditions, and journey type. Smaller cars usually have better MPG than larger vehicles, but real fuel economy can vary.
How do I calculate fuel cost for a trip?
Estimate how much fuel the trip will use, then multiply fuel used by fuel price.
Formula:
Fuel cost = fuel used × fuel price
How do I calculate cost per mile?
Divide the total fuel cost by total miles.
Formula:
Cost per mile = total cost ÷ miles
How do I calculate mileage reimbursement?
Multiply business miles by the reimbursement rate.
Formula:
Mileage reimbursement = business miles × rate per mile
Can I use this calculator for business mileage?
Yes, you can use it to estimate business mileage claims, but you should use the rate provided by your employer, accountant, tax authority, or company policy.
Does this calculator use official mileage rates?
No. This calculator lets you enter your own mileage rate. It does not provide official tax, legal, or reimbursement advice.
Can this calculator use kilometres?
Yes. You can use kilometres and miles, depending on the section of the calculator and the units available.
Is the fuel cost result exact?
No. Fuel cost is an estimate. Real fuel costs can change because of fuel prices, traffic, driving style, road conditions, vehicle condition, and fuel efficiency.
Disclaimer
This Mileage Calculator is for general planning and estimation only. Fuel prices, vehicle efficiency, mileage rates, reimbursement policies, tax rules, and real driving conditions can vary. For official mileage claims, business expenses, tax decisions, or reimbursement rules, always check your employer, accountant, tax authority, or relevant official guidance.