Need to know exactly how many days between two dates? Use our free Days Between Dates Calculator to count days until an event, days since a past date, or the duration of a contract.
Common Use Cases
- Countdowns: Days until a deadline, trip, wedding, or exam date.
- Contract durations: Exact day count for leases, employment agreements, or project timelines.
- Elapsed time: How many days since a past event or milestone.
- Planning: Figure out how long between two dates for scheduling and logistics.
Start Date Counting Convention
A common point of confusion is whether the start date counts as day 1. This tool uses the standard end date minus start date convention — the start date is not counted as a full elapsed day.
Example: from Monday (Jan 1) to Wednesday (Jan 3) = 2 days, not 3. If someone says "3 days from Monday," they might mean Thursday depending on context — this tool always shows the precise calendar difference so you can verify against your specific convention.
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Frequently Asked Questions
Does the calculator count the start date as day 1?
No — the day count is end date minus start date, so the start date itself is not counted as a full elapsed day. For example, Jan 1 to Jan 3 equals 2 days, not 3.
Can I calculate days between a past date and today?
Yes — set one date to today and the other to any past or future date to see days elapsed or days remaining.
Does this account for leap years automatically?
Yes — the calculation uses actual calendar dates, so leap years are automatically factored into the day count correctly.
Can I use this to calculate exact contract or lease duration?
Yes — entering the start and end dates of an agreement gives you the precise day count, useful for contracts, leases, or any duration-based agreement.