Date Calculator
Use this free date calculator to find the exact number of days between two dates, or to add and subtract years, months, weeks, and days from any start date. Useful for project deadlines, contract durations, legal time limits, pregnancy due dates, and travel planning. Works instantly in your browser — no sign-up required.
How to Use
- For Date Difference: select a start and end date, choose all days or business days only, then click Calculate Difference.
- For Add / Subtract: select a base date, choose Add or Subtract, enter years/months/weeks/days, then click Calculate Date.
Features
- Days, weeks, months, and years between any two dates
- Business days count (excludes weekends)
- Add or subtract from any date to find a future or past date
- Day of week, week of year, and day of year for any result
- Days from today label on results
- Free and 100% browser-based
How Many Days Between Two Dates?
The date difference mode answers searches like days between two dates, days between dates calculator, and date difference calculator. Enter a start and end date and the tool counts exact calendar days, total weeks, total months (broken down as years, months, and days), total hours, total minutes, and optionally the number of business days excluding weekends.
Business day counting is useful for project managers, HR teams, and anyone working with notice periods, payment terms, or SLA windows. Toggle "Business days only" to exclude Saturdays and Sundays from the count.
Add or Subtract Days, Weeks, Months, or Years
The add/subtract mode answers searches like days from today calculator, add days to date, and date from today in X days. Enter any start date, choose whether to add or subtract, then specify any combination of years, months, weeks, and days. The result shows the full date name, the day of the week it falls on, its week number in the year, and how many days it is from today.
This is particularly useful for calculating visa expiry, loan due dates, probation end dates, subscription renewals, and warranty expirations — anywhere you need a date N days or months away from a known start.
Practical tips for Date Calculator
Before you start, keep your source ready and decide what “done” looks like — a downloaded file, copied text, or a converted format. Date Calculator works best when the input is clear and complete.
If the first result is close but not perfect, adjust one setting at a time and compare again. That is usually faster than restarting from scratch.
When to use Date Calculator
Use Date Calculator when you need date calculator without installing software or creating an account. It is a good fit for quick one-off jobs and everyday Calculators workflows.
If your task is actually a different step — for example compressing before converting — switch to the related ToolSphere utility that matches that step.
Frequently Asked Questions
Does this count the start or end date?
The calculation counts the total days from the start date up to but not including the end date, matching the way most deadline and duration calculations work.
How are business days calculated?
The tool counts every day that is not a Saturday or Sunday. It does not account for public holidays, since these vary by country.
Can I find a date 100 days from today?
Yes. Switch to Add / Subtract, enter today as the start date, add 100 days, and click Calculate Date.
Does it handle month-end edge cases?
Yes. Adding one month to January 31st gives February 28 (or 29 on a leap year), matching standard calendar arithmetic.
Is my data stored?
No. All calculations run in your browser with no data sent to ToolSphere servers.
