Mileage Calculator

What Is a Mileage Calculator?

This calculator estimates mileage reimbursement or tax deduction value by multiplying business miles driven by a per-mile rate — commonly the IRS standard mileage rate in the US, or your employer's specific reimbursement rate.

How to Use the Mileage Calculator

1. Enter the number of business miles driven.
2. Enter the reimbursement or deduction rate per mile.
3. View your total reimbursement or deduction amount instantly.

Mileage Reimbursement Formula

Worked Example

Understanding Mileage Rates

The IRS updates its standard mileage rate annually (and sometimes mid-year) for business use of a personal vehicle — check the current rate on IRS.gov, since it changes periodically. Employers may also set their own reimbursement rates, which can differ from the IRS standard rate.

Tips for Tracking Mileage

• Keep a detailed log of dates, purposes, and miles driven for each business trip — required for tax deduction purposes.
• Use a mileage tracking app to automate logging and reduce errors.
• Understand whether you're using the standard mileage rate or actual expense method for tax purposes — you generally can't switch between methods freely year to year for the same vehicle.

Common Mistakes to Avoid

• Using an outdated mileage rate — rates change periodically, so verify the current rate for your tax year.
• Including personal commuting miles, which generally aren't deductible business mileage.
• Not keeping adequate documentation to support mileage claims if audited.

Frequently Asked Questions