Maintenance interval calculator
Enter the last service date or meter reading and the interval — get the next due date, how much is left, and an overdue flag. Save tasks to keep a running list. Everything is stored only in your own browser.
Add a task
Enter a task name and a positive interval.
Example placeholders above are Sample data. This calculator does record-keeping math only — always follow your equipment or vehicle manufacturer's manual for actual service needs.
Note: saved tasks live in this browser's local storage. Some browsers evict site data you haven't used for a while (for example, Safari after 7 days) — use Export below to keep a backup.
Saved tasks
No saved tasks yet — add one above and it will appear here (stored in this browser only).