Mileage Calculator
Calculate mileage, travel distance, and reimbursement for business travel
Fuel Economy Calculation
MPG (US)
Miles per gallon
L/100km
Liters per 100km
km/L
Kilometers per liter
MPG (Imperial)
UK gallons
Cost per Mile
At $3.5/gal
CO₂ Emissions
For this trip
Annual Projections
Distance
15,600 miles
Fuel
520 gallons
Cost
$1820
CO₂
10.2 tons
How it works
A mileage calculator computes either fuel economy (miles per gallon) or mileage reimbursement (miles driven times a per-mile rate). For reimbursement, multiply business miles by the standard rate; for economy, divide miles by gallons used.
Mileage reimbursement & economy
Reimbursement = business miles × rate per mile MPG = miles ÷ gallons
- rate per mile
- e.g. the IRS standard mileage rate
- business miles
- deductible miles driven
Worked example
- Drove 500 business miles
- Rate = $0.67/mile
- Reimbursement = 500 × 0.67
$335 in mileage reimbursement.
Good to know
- The IRS standard mileage rate changes yearly — use the current rate for tax deductions.
- Keep a log of date, purpose, and miles to substantiate a deduction.
- You generally choose either the standard mileage rate or actual vehicle expenses, not both.
Related Calculators
Frequently Asked Questions
How do I calculate mileage reimbursement?
Multiply business miles driven by the applicable rate: 500 miles at a 70-cents-per-mile rate is $350. The IRS standard mileage rate is set each year (with occasional mid-year changes), so check the current rate on IRS.gov before calculating.
What trips count as business mileage?
Driving between work sites, to client meetings, and on work errands counts. Commuting between home and your regular workplace does not — it's considered personal even if you work during the drive. Mixed trips count only the business portion.
How should I track my mileage for taxes or reimbursement?
Keep a contemporaneous log: date, destination, business purpose, and miles (or odometer readings) for each trip. A mileage-tracking app or a simple notebook both work — the key is recording trips as they happen, since reconstructed logs are weak evidence in an audit.
What does the standard mileage rate cover?
It's an all-in allowance covering fuel, depreciation, insurance, maintenance, and repairs — you can't deduct those separately on top of it. The alternative is the actual-expense method, which deducts the business share of real vehicle costs and suits expensive-to-run vehicles.
How do I calculate my cost per mile to drive?
Add up annual vehicle costs — fuel, insurance, maintenance, registration, and depreciation — and divide by miles driven per year. Many drivers find their true cost runs well above fuel alone, which is useful when deciding whether a reimbursement rate actually covers your driving.