Add or subtract days from any date. Includes working days option.
Counting days manually between two dates is surprisingly error-prone — months have different lengths, leap years complicate things, and it's easy to be off by one. This calculator handles it correctly every time.
Add or subtract days, weeks, months, or years from any date, or find the exact difference between two dates. It's useful for calculating project deadlines, working out notice periods, figuring out when a payment is due, confirming warranty expiry dates, or settling any question that involves counting forward or backward on a calendar.
The business days option excludes weekends, which is handy for anything involving contract terms, legal notice periods, banking transactions, or workplace timelines that use working days rather than calendar days.
Calendar days count every day including weekends and public holidays. Business days (or working days) count only Monday to Friday, excluding public holidays. Many legal notices, payment terms, and contracts specify one or the other — it's worth checking which applies.
Enter your start date, select 'add days', enter 30, and click Calculate. The result is the date 30 calendar days later. If your agreement specifies business days, use the business days option instead.
Yes. You can add or subtract any combination of years, months, weeks, and days in a single calculation. The calculator handles month-length variations and leap years correctly.
Switch to the 'difference between dates' mode, enter your start and end dates, and the calculator returns the exact number of days — and optionally weeks, months, and years.