How to use the mileage reimbursement calculator
- Type the rate per mile you want to use, in dollars. The field starts empty on purpose. Press the example button if you only want to see how it works.
- List each trip as a row with its date, miles and purpose. Add up to 30 rows with Add a trip and remove rows you do not need.
- Read the total reimbursement, the total miles and the table with one amount per trip.
- Download the CSV for a spreadsheet or the PDF for a record you can attach to an expense report. Use Save in this browser if you want your list to be there next time.
Formula
Reimbursement for a trip = miles x rate per mile, rounded to the nearest cent (half up)
Total reimbursement = the sum of the trip amounts
Total miles = the sum of the trip miles
The rate is whatever you type. This tool does not look up or assume a rate, because rates change by year and differ by the purpose of the trip.
Worked examples
Two trips at 70 cents: 24 miles x $0.70 = $16.80 and 18.5 miles x $0.70 = $12.95. The total is $29.75 for 42.5 miles.
Rounding: 3 miles at $0.725 is $2.175, which rounds half up to $2.18. Ten miles at the same rate is $7.25, so those two trips total $9.43.
A round number: 1,000 miles at $0.70 is $700.00.
Where the rate comes from
The IRS publishes standard mileage rates each year, and they differ for business use and for other purposes. For 2025 the business rate announced by the IRS was 70 cents per mile, which is why the example button uses it. Always confirm the current year's rate on the IRS standard mileage rates page before you use one.
Your employer may use a different rate, a flat allowance or a company policy. If you are reimbursed by an employer, use the figure in your policy. If you deduct mileage on a tax return, your tax adviser or the IRS instructions decide which method and rate apply to you.
Keeping a log that holds up
A good mileage record lists the date, the miles, where you went and why. The purpose column is there for that reason. Entering trips as you go is easier and more accurate than reconstructing them at the end of the month.
This tool works out the arithmetic and gives you a record you can export. It does not decide which trips are business trips, whether commuting counts or what documentation a particular organization requires.
Privacy
Everything stays in your browser. If you choose Save in this browser, the trips are stored on your device only and you can reset them at any time.
Assumptions and limits
- The rate is the number you enter. It is not looked up and it is not checked against any official rate.
- Each trip is rounded to the cent first, and the total is the sum of those amounts.
- Miles must be greater than zero and at most 100,000 per trip. The rate must be above zero and at most $10 per mile.
- The tool does not decide which trips qualify for reimbursement or a deduction, and it is not tax advice.
Frequently asked questions
What is the mileage rate for this year?
The rate is set by the IRS and can change every year. This tool leaves the field empty so you enter the current figure from the IRS page or from your employer. The 70 cents in the example button is the 2025 business rate, and you must confirm the rate for the year you are claiming.
How do I calculate mileage reimbursement?
Multiply the miles driven by the rate per mile. For 100 miles at $0.70, that is $70.00. Add a row for every trip so each one is recorded with its date and purpose.
Can I include a round trip?
Yes. Enter the full distance driven for the round trip as one row, or enter each leg as its own row. The total is the same either way.
Why is my total a cent different from my own calculation?
Each trip is rounded to the nearest cent before the trips are added. If you multiplied the total miles by the rate once, a fractional cent per trip can make the totals differ by a cent or two.
Does it include parking, tolls or fuel?
No. It multiplies miles by a rate. Costs such as tolls and parking are separate items on most expense reports, and fuel is already built into a standard mileage rate.