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Date Calculation Tools
Date Calculator
Calculate days, workdays, weekdays, week numbers, and future dates in one place. Choose the right date calculator for planning, deadlines, travel, and everyday scheduling.
All Calculators
Pick the calculator that matches your task and go straight in.
Birthday Calculator
Add or subtract days, weeks, months, or years from any date. Great for finding future deadlines, follow-up dates, renewal dates, and milestones.
Workdays
Count business days between two dates while excluding weekends. Ideal for delivery estimates, work schedules, contracts, and deadline planning.
Add Workdays
Move a date forward or backward by business days only. Use it to calculate due dates, turnaround times, and office-based schedules more accurately.
Weekday Calculator
Find the day of the week for any past or future date. Helpful for checking birthdays, event dates, meeting plans, and historical dates.
Week Number
Check the ISO week number for any date instantly. Useful for project tracking, reporting cycles, production schedules, and team planning.
Common Date Calculator Scenarios
Why Use These Calculators
Business-day support
Handle deadlines more accurately with workday-only calculations.
Useful for real planning
Plan travel, launches, schedules, and personal events with less friction.
Works with countdowns
Move from calculation to countdown creation in one connected flow.
Date Calculator FAQ
Related Tools
Countdown Templates
Start with ready-made countdown pages for birthdays, weddings, launches, and more.
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Explore public holidays by country and plan dates around them.
Countdown Widget
Embed a live countdown on your website with a shareable widget.
Create Countdown
Turn a planned date into a live countdown you can save and share.