Date math
Days Between Dates Calculator
Count the exact number of days, weeks, and months between any two dates.
34 tools. Small answers for a well-planned day.
Free calendar & time tools
Count a deadline, plan a workweek, or find a moment that works across time zones. Useful tools, ready in your browser. No account, no app install, and no signup to see your answer.
Start with the answer you need. When you want to keep it close, each tool shows a relevant widget design and how to set it up on iPhone.
34 of 34 tools
Date math
Date Calculator - Add or Subtract Days
Add or subtract days, weeks, and months from any date to find a future or past date.
Date math
Week Number Calculator
Find the ISO week number for today or any date, and see which dates a week covers.
Date math
Age Calculator
Calculate your exact age in years, months, and days from your date of birth.
Progress
Year Progress Calculator
See how much of the year has passed and how many days are left, as a live percentage.
Countdowns & timers
Countdown to a Date
Count down the days until a birthday, holiday, deadline, or any future event.
Calendars
Monthly Calendar Generator
Generate a clean printable month calendar for any month and year, Sunday or Monday start.
Date math
Day of the Week Finder
Find out what day of the week any date falls on - past, present, or future.
Work & planning
Business Days Calculator
Count the working days (Monday to Friday) between two dates, excluding weekends.
Date math
Leap Year Checker
Check whether any year is a leap year and see the next leap years coming up.
Clocks & time
Time Duration Calculator
Find the hours and minutes between two clock times, including an overnight interval.
Clocks & time
Time Calculator
Add or subtract hours, minutes, and seconds from a clock time.
Work & planning
Hours Calculator
Calculate paid shift hours after an unpaid break, including overnight shifts.
Work & planning
Weekly Work Hours Calculator
Total a seven-day timesheet with separate start, end, and break times for each day.
Clocks & time
Decimal Hours Converter
Convert decimal hours to hours and minutes, or turn an hours-and-minutes duration into decimal hours.
Clocks & time
Time Unit Converter
Convert weeks, days, hours, minutes, and seconds using fixed-duration units.
Work & planning
Business Date Calculator
Add or subtract working days while skipping weekends and your own holiday dates.
Countdowns & timers
Birthday Countdown
Find the next birthday automatically, including a choice for February 29 birthdays in common years.
Date math
Anniversary Calculator
Find completed anniversary years and the next anniversary date for a relationship or milestone.
Clocks & time
Date and Time Duration Calculator
Measure a multi-day event in days, hours, and minutes, with an explicit time zone and DST handling.
Date math
Day of Year Calculator
Find the ordinal day number for any date, or turn a year and day number back into a date.
Date math
Days in a Month Calculator
Count the calendar days, weekdays, and weekend days in a selected month.
Progress
Month Progress Calculator
See how much of a month has elapsed at a chosen local date and time.
Progress
Week Progress Calculator
Check the percentage of a Monday-to-Sunday week that has passed.
Progress
Day Progress Calculator
See today’s progress or calculate the fraction of any local day that has elapsed.
Calendars
Printable Yearly Calendar
Create a full-year calendar with all twelve months and Sunday or Monday week starts.
Calendars
Weekly Planner
Build a seven-day plan with daily notes, then print it or save a local text copy.
Calendars
Calendar Event (.ics) Generator
Create a downloadable calendar event with a name, time zone, location, and description.
Countdowns & timers
Online Stopwatch
Time an activity with start, pause, reset, and individual lap splits.
Countdowns & timers
Online Countdown Timer
Run a countdown for a custom duration, with pause, resume, reset, and an optional completion sound.
Countdowns & timers
Pomodoro Timer
Alternate adjustable focus sessions and short breaks, with a longer break after four focus rounds.
Countdowns & timers
Dual Countdown
Compare time remaining to two named events side by side.
Clocks & time
Time Zone Converter
Convert a date and time between named time zones, including daylight-saving and next-day differences.
Work & planning
Time Zone Meeting Planner
Compare one meeting time across three time zones and check common working-hour overlap.
From a calculation to a daily glance
Keep the whole month in view.
Choose Monthly Calendar in Monthly Calendar Widgets to keep your calendar close. Calendar widgets can show enabled iOS and Google Calendar events.
- 1Add the events you want to see to your calendar.
- 2Enable that calendar in the app.
- 3Add Monthly Calendar; use Edit Widget → Design to choose its look.
Web results do not automatically sync to the app. Setup is manual; calendar events appear through your enabled calendars.