📅 Date & Time Calculators

9 free calculators for dates, deadlines, countdowns, and time conversions.

🎂
Age Calculator
Exact age in years, months, days, hours.
Popular
📅
Date Difference Calculator
Days, weeks, months between any dates.
Popular
🗓️
Days Between Dates
Quick calendar day counter.
📅
Add / Subtract Days
Date arithmetic with any unit.
📋
Working Days Calculator
Business days excluding weekends.
⏰
Countdown Timer New
Days until any future event.
🗓️
Week Number Calculator New
ISO week number for any date.
🌍
Time Zone Converter New
Convert between world time zones.
⌚
Unix Timestamp Converter New
Epoch ↔ human-readable date.

📖 Featured Date & Time Guides

🎂
How to Calculate Age from Date of Birth
Learn how age is calculated accurately including leap years.
📅
How Many Days Between Two Dates
Calculate exact days between any two dates with our guide.