Toolzie

Date Duration Calculator

Duration will appear here.

How to Use the Date Calculator

Choose mode: days between, or add/subtract days. Results in days, weeks, months, years.

Calculate durations for planning, deadlines, countdowns, milestones. Instant accurate answers.

Frequently Asked Questions

Weekends?

Counts all calendar days.

Weeks/months?

Yes, add or subtract any unit.

Leap years?

Yes, proper handling.

Business days?

Estimate: total minus ~2 per 7.

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About This Tool

Calculate the number of days, weeks, months, or years between two dates — or add and subtract time from a date — with the Toolzie Date Calculator. Perfect for deadlines, event planning, contract terms, and age calculations.

How to Use

  1. Select your start date using the date picker.
  2. Choose your end date, or enter a number of days/months to add or subtract.
  3. Click Calculate to see the result.
  4. View the difference broken down by years, months, weeks, and days.

Frequently Asked Questions

Does it account for leap years?

Yes — leap years are fully accounted for in all calculations.

Can I calculate business days only?

The standard mode calculates calendar days. Business day calculation excludes weekends.

How do I find a date 90 days from today?

Switch to 'Add/Subtract' mode, enter today as the start date, and add 90 days.

Can I calculate the number of days until an event?

Yes — set today as the start date and your event date as the end date.