Date Add / Subtract
The Date Add / Subtract calculator adds or subtracts days, weeks, months, or years from any date - perfect for finding deadlines, renewal dates, and future milestones.
Date arithmetic made simple
Enter a starting date and how much time to add or subtract, and it returns the resulting date. Need to know the date 90 days from now, six weeks before an event, or one year after a purchase? It calculates it instantly, handling month lengths and leap years so you never miscount on a calendar.
Common uses
- Warranty, subscription, and contract renewal dates.
- Project deadlines a set number of working days out.
- Return-by, notice-period, and follow-up dates.
To measure the gap between two known dates instead, use the Date Duration Calculator.
Frequently Asked Questions
Can I add months and years, not just days?
Yes. You can add or subtract days, weeks, months, or years, and it adjusts for month lengths and leap years.
What happens when adding a month lands on a non-existent day?
The calculator handles month-end edge cases sensibly, such as adding a month to January 31.
What is it commonly used for?
Finding renewal dates, deadlines, warranty expiries, and any future or past date relative to a known one.
How do I find the gap between two dates instead?
Use the Date Duration Calculator, which counts the time between two specific dates.
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