Stopwatch
Browser stopwatch with start, pause, resume, reset, and lap times.
6 visitors
Date & Time Calculators
Calculate age, birthdays, date differences, working days, pregnancy dates, countdowns, retirement dates, Unix timestamps, time zones, and other date/time calculations using accurate algorithms.
Pregnancy Due Date Calculator
Estimate due date, pregnancy week, trimester, and milestones from LMP, conception, IVF, or ultrasound.
5 visitors
Timer
Countdown timer with pause/resume, alarm, and fullscreen mode.
5 visitors
Age Calculator
Calculate exact age in years, months, days, and more — plus next birthday and zodiac.
4 visitors
Birthday Calculator
Find next/previous birthday, weekday born, and countdown days.
4 visitors
Date Difference Calculator
Measure the span between two dates in years, months, weeks, days, and time units.
4 visitors
Business Days Calculator
Count business days between dates with weekend and holiday exclusions.
4 visitors
Ovulation Calculator
Estimate ovulation date, fertile window, and next period from cycle length.
4 visitors
Time Zone Converter
Convert date and time between world time zones with UTC offsets and DST hints.
4 visitors
Retirement Calculator
Project retirement date and days remaining from DOB and retirement age.
4 visitors
Countdown Calculator
Live countdown to any target date and time.
3 visitors
Working Days Calculator
Count working days with optional Saturday/Sunday and custom holidays.
3 visitors