Free Online Days Between Dates Tool

1. Pick a start date and an end date with the date pickers.
2. Toggle inclusive on if you want both endpoints to count as days.
3. Read total days, weeks-and-days and business-day counts in the result panel.
4. If end is before start, the tool shows absolute differences and flags the reversal.

Counting days between two dates sounds trivial until you pick a convention. Inclusive counts both endpoints — a Monday-to-Friday contract spans 5 days. Exclusive treats the gap as elapsed time, so Monday to Friday is 4 days later. Spreadsheets, legal contracts and HR systems disagree on which to use, so this tool exposes the toggle and labels each result.

HR teams compute leave entitlements; finance teams calculate interest-accrual periods; project managers measure how long a feature actually took from start to ship. Alongside the raw day count, the result shows weeks-and-days (30 days as 4w 2d), an approximate months-and-days view, a formal years-months-days breakdown and the count of Monday–Friday business days. Business days here exclude weekends only — public-holiday handling lives in the Work Days Calculator.

All arithmetic happens locally using the native Date object. Nothing is sent to a server, and there is no cap on the date range — the tool handles dates centuries apart without trouble.