Date Range Calculator

Figure out exact durations, business days, deadlines, countdowns, and future or past dates in one place. Handy for sprint planning, invoices, subscription periods, travel, contracts, and shipping windows.

Exact duration math Business day mode Add / subtract dates 100% client-side

Date difference

Compare two dates or datetimes and get exact elapsed time plus working-day counts.

Add or subtract from a date

Useful for due dates, trial periods, cooldowns, anniversaries, and scheduling windows.

Countdown

See how far away an event is, including a human-readable countdown and urgency signal.

Results

Everything updates locally in your browser. Nothing is uploaded.

Calendar days
Business days
Weeks + days
Hours

Exact duration

ReadablePick two dates to calculate.
Elapsed
Inclusive count
Weekday count

Date math output

Result date
Day of week
ISO format
Business-day helper

Countdown output

Status
Readable
Total hours
Total minutes
Your summary will appear here after a calculation.