📅 Date & Time Calculators
Calendar math is deceptively tricky — months have four different lengths, leap years interfere, and time is base-60. These tools get it exactly right: your age to the day, the precise gap between two dates, deadlines like "90 days from today", clock-time arithmetic, and hours worked with breaks deducted. Every calculation handles leap years and month lengths properly.
- Age Calculator
Calculate your exact age in years, months, and days from your date of birth — plus total weeks, days, hours, and a countdown to your next birthday.
- Date Calculator
Count the exact days, weeks, months, and years between two dates, or add and subtract days from any date to find a deadline.
- Time Calculator
Add or subtract times in hours, minutes, and seconds without base-60 headaches.
- Hours Calculator
Calculate hours worked between a start and end time, minus breaks — including overnight shifts.