Days Calculator
How many days between dates, or since and until a date.
What does Days Calculator do?
Count days between two dates, or find how many days have passed since a date and how many remain until one. Results include the equivalent in weeks, hours and minutes.
How to Use Days Calculator
- 1Choose a modeBetween, since, or until.
- 2Pick your date or datesThe result appears immediately.
- 3Check the alternativesWeeks, hours and business days.
Key Features
- Three modes: between two dates, since a date, and until a date
- Equivalent in weeks, hours, minutes and seconds
- Optional inclusion of the end date
- Business days shown alongside the total
- Milestone dates such as the 100th and 1,000th day
Frequently Asked Questions
How many days are between two dates?
Subtract the earlier from the later. The calculator does this exactly, including leap days. Whether the end date counts depends on your purpose — the toggle covers both conventions.
Should the end date be included?
It depends what you are counting. A hotel booking from the 3rd to the 6th is three nights. A contractual period "from the 3rd to the 6th inclusive" is four days. Choose the toggle that matches your situation.
How many days are in a year?
365, or 366 in a leap year. Over a long span the average is 365.2425 days, which is what makes multi-year day counts slightly larger than a simple multiplication suggests.
Are time zones taken into account?
No, and deliberately so. Dates are treated as calendar days rather than instants, so the answer is the same wherever you are.
Dates and times are calculated in your browser using its built-in IANA time zone database. Nothing you enter is transmitted.
Related Tools
Date Difference Calculator
Days, weeks, months and years between any two dates.
Weeks Calculator
Count weeks between dates, with the leftover days shown.
Months Calculator
Count complete months between two dates.
Business Days Calculator
Count working days between dates, excluding weekends and holidays.