Annual mileage for a lease or insurance quote: use odometer evidence
Project yearly driving from two odometer readings and check your allowance against a realistic buffer.
How it works
Take two dated odometer readings and divide the distance travelled by the elapsed days, then multiply by 365.25 for an annualised estimate. Keep kilometres and miles distinct; 1 mile is about 1.609 kilometres. A short holiday or unusual commuting month may be a poor baseline, so compare several intervals.
Use the inputs from your own situation and keep the units consistent. A calculator gives an arithmetic estimate under the assumptions you enter; compare it with real records before making a decision.
Worked example
If an odometer moves from 18,000 to 22,200 miles over 140 days, the rate is 30 miles a day, or about 10,958 miles per 365.25-day year. A 10,000-mile annual lease allowance would be roughly 958 miles below that pace. The result does not automatically predict excess-mileage fees; use the contract terms and remaining period.
What to check
Check whether the allowance is annual or total over the lease term, and whether unused miles carry forward. Insurance declarations can ask for prospective use rather than last year’s total. Work-from-home days, a new commute and long trips can change the forecast. Verify the odometer readings and dates.
Practical next step
Estimate a normal week, add planned exceptional trips and compare the projected total with the allowance. Retain a modest buffer rather than declaring an artificially low figure.
Related calculators and articles
annual mileage, vehicle ownership cost. annual car mileage estimate.
Save your assumptions and repeat the calculation if an input changes. The linked article explains a neighboring decision that this single formula does not settle.