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Date Calculator
Add or subtract days, weeks, or months from any date to find a future or past date.
All calculations run in your browser — nothing is sent or stored. Browse all free tools · Etsy Shop ↗
Frequently Asked Questions
How do I calculate a due date from today?
Use the Add/Subtract tab, enter today’s date, and add the number of days. For a 30-day deadline: today + 30 days. The calculator accounts for month lengths and leap years automatically.
How many days between two dates?
Use the ‘Days Between Dates’ tab and enter the start and end dates. The result shows total days, weeks, months, and years. For business days only, subtract weekends — typically about 71% of calendar days are business days.