Find the number of days between two dates, or add and subtract days from any date. Fast, free, and accurate.
Our free date calculator helps you find the exact number of days, weeks, months and years between any two dates. Whether you need to calculate how many days until an event, how long ago something happened, or what date falls a certain number of days from now — this tool gives you the answer instantly.
Simply select a start date and an end date, then click "Calculate Difference." The result shows the total number of days, broken down into weeks, months, years, hours, minutes, and weekdays. Switch to the "Add / Subtract Days" tab to find what date falls a set number of days before or after any starting date.
Calculate deadlines, project timelines, age calculations, pregnancy due dates, contract durations, and countdowns to holidays and events. The Quick Date Reference section below the calculator shows common milestones relative to today.