Start with the last service
If your last oil change was at 42,000 miles and you choose a 5,000-mile interval, the next threshold is 47,000 miles. At a current 45,600 miles, 1,400 miles remain. These are illustrative values, not a recommended interval.
Due means the limit is reached
At 47,000 in that example, the mileage limit is due exactly. At 48,000, it is 1,000 miles overdue. Negative remaining distance is shown honestly rather than reset to zero.
Months are calendar months
August 31, 2026 plus six calendar months is February 28, 2027. In a leap year, February can end on the 29th. Month-end dates are clamped to the final valid day.
Use the interval specified for your vehicle or chosen service plan. The calculator adds your numbers; it does not decide a manufacturer-approved interval. Without a driving-rate assumption, a mileage threshold cannot tell you the date you will reach it.
Yes. Choose kilometres and enter every mileage value in kilometres. Switching the label does not convert existing numbers.
No. This browser tool calculates one reminder summary. Your entries are not saved, sent to the mobile app or used to monitor your odometer.