Mileage Calculator UK

Calculate Mileage Costs Fuel & Claims

Distance (miles)

Total miles travelled.

Fuel Efficiency (MPG)

Miles per gallon your car achieves.

Fuel Price (per litre £)

Current fuel price per litre.

Trip Type

Business trips can be claimed as expenses.

HMRC Mileage Rate (per mile) (business only)

HMRC approved mileage rate (45p for first 10,000 miles).

HMRC Rates 2025/26: 45p per mile for first 10,000 miles, 25p thereafter.

Example 100 miles, 45 MPG, £1.45/L → £14.65 fuel cost

Mileage Summary

Enter your journey details, then click Calculate Mileage.

What Is a Mileage Calculator?

A mileage calculator helps you calculate the cost of your journey including fuel expenses and HMRC-approved mileage claims. This mileage calculator UK is ideal for business mileage claims, personal travel cost estimation and fuel expense tracking.

How to Use the Mileage Calculator

Enter the distance in miles, your car's fuel efficiency (MPG), the fuel price per litre, and select your trip type. For business trips, the HMRC mileage rate will calculate your claimable amount. Click Calculate Mileage to see the results.

How Mileage Costs Are Calculated

Fuel Cost = (Distance ÷ MPG) × (Fuel Price × 4.546)
HMRC Claim = Distance × HMRC Rate

Mileage Example

Example: 100 miles, 45 MPG, £1.45/L, business trip

Fuel cost: (100 ÷ 45) × (1.45 × 4.546) = £14.65
HMRC claim: 100 × 0.45 = £45.00
Total claimable: £45.00
Net saving: £30.35

HMRC Mileage Rates (2025/26)

45p per mile — for the first 10,000 business miles
25p per mile — for business miles over 10,000
5p per mile — for passenger supplement
24p per mile — for motorcycle (all miles)
20p per mile — for bicycle (all miles)

Fuel Efficiency (MPG) Guide

City driving: 30-40 MPG
Mixed driving: 40-50 MPG
Motorway driving: 50-60 MPG
Electric vehicles: 3-5 miles per kWh (different calculation)

Business vs Personal Mileage

Business: Can claim HMRC approved rates as an expense
Personal: Cannot claim expenses but can track fuel costs

Common Mileage Mistakes

Using the wrong rate — ensure you use the correct HMRC rate
Forgetting conversion — fuel price is per litre, not per gallon
Not tracking personal vs business — only business miles are claimable
Using outdated rates — check current HMRC rates

Important: This calculator provides estimates only. HMRC rates may change annually. Always check current rates and consult a tax professional for exact claims.

Important Assumptions and Limitations

HMRC rates: 45p/25p (2025/26)
Conversion: 1 gallon = 4.546 litres
Fuel efficiency is an estimate — actual may vary
Results are estimates, not official HMRC calculations

Frequently Asked Questions

What is a mileage calculator? +

What is the HMRC mileage rate for 2025/26? +

How do I calculate mileage claim? +

What is MPG? +

Can I claim mileage for personal trips? +

What is the fuel cost calculation? +

Are the results exact? +

Written and reviewed by Abdul Wahid

Travel and financial content specialist with a focus on UK mileage and expense tracking.

For salary and pay calculations, visit our Salary Calculator UK or Pay Calculator UK. For tax claims, try our Tax Calculator UK.