ToolNestFree Days Between Dates Calculator
How many days between two dates? Our free date duration calculator gives you the exact count in days, weeks, and months — with an optional business-days mode that skips weekends, perfect for project planning, contracts, and countdowns.
—Days
—Weeks
—Months (approx)
✓ Free forever · ✓ No signup · ✓ Runs in your browser — your data never leaves your device.
How to Use the Days Between Dates
- Pick your start and end dates.
- Tick 'Business days only' to exclude weekends (handy for work timelines).
- Click Calculate — days, weeks, and approximate months appear instantly.
- Swap the dates to count backwards from a deadline.
Why Use Our Days Between Dates?
- Exact day counts — leap years handled correctly.
- Business-days mode — skips Saturdays and Sundays.
- Weeks & months — multiple views of the same duration.
- Free & private — runs in your browser, no signup.
Frequently Asked Questions
How are days between dates counted?
End date minus start date. Jan 1 to Jan 2 = 1 day. Tick business-days mode to skip weekends.
Does it handle leap years?
Yes — February 29 is counted correctly in leap years.
What's the difference between calendar days and business days?
Calendar days include weekends; business days count Monday–Friday only — the standard for contracts and project plans.
Can I count days until a future event?
Yes — set the start date to today and the end date to your event for an exact countdown.
Is it free?
Completely free, no account needed.