Duration will appear here.
Choose mode: days between, or add/subtract days. Results in days, weeks, months, years.
Calculate durations for planning, deadlines, countdowns, milestones. Instant accurate answers.
Counts all calendar days.
Yes, add or subtract any unit.
Yes, proper handling.
Estimate: total minus ~2 per 7.
Date calculations come up more often than people expect. Common uses: figuring out end dates for contracts, project deadlines, or trial periods (start + 90 days = when does it end?). Calculating elapsed time for invoices ("net 30" — when is payment due?), employment tenure, or how long until a baby reaches a milestone. Counting business days for SLA compliance, shipping estimates, or court filings (excluding weekends and holidays). And planning future dates for vacations, anniversaries, or scheduled events.
A 30-day SLA means 30 calendar days, but most business operations happen on business days. If you start a project on a Friday and add 30 calendar days, you land on a Saturday — and nothing happens that day. Many legal and financial rules use "business days" to avoid ambiguity. In Canada, federal holidays are: New Year's Day, Good Friday, Victoria Day, Canada Day, Labour Day, Thanksgiving, Remembrance Day (federal), Christmas, and Boxing Day. Provincial holidays add more.
When calculating dates across borders, remember time zones. A deadline of "March 1, 5 PM PST" is "March 2, 9 AM CET" in Berlin. Our calculator uses your local browser time — if you're scheduling for someone else, factor in their time zone. For global teams, use a tool like World Time Buddy to avoid the "we both thought the meeting was tomorrow" problem.
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.
Yes — leap years are fully accounted for in all calculations.
The standard mode calculates calendar days. Business day calculation excludes weekends.
Switch to 'Add/Subtract' mode, enter today as the start date, and add 90 days.
Yes — set today as the start date and your event date as the end date.