Date & Time
Date & Time Calculators
Free calculators for age, dates, countdowns, and time zones.
Age Calculator
Calculate exact age in years, months, days
Date Difference
Days between two dates
Days Until
Countdown to a future date
Add/Subtract Days
Add or subtract days from a date
Time Zone Converter
Convert between time zones
Hours Calculator
Calculate work hours and overtime
Birthday Calculator
Day of week, zodiac sign, and more
Pregnancy Due Date
Calculate expected delivery date
Sunrise & Sunset
Sun times for any location
Week Number
Find the week number of a date