01
Personal date calculation
Age Calculator
See age in years, months, days, weeks, and time until the next birthday.
Open toolDate calculations, without the manual counting
Everyday date tools in one simple place
Calculate age, compare dates, count business days, add or subtract time, and track upcoming events with clear results.
Your dates stay in your browser. No account is required.
DateKit tools
Six focused calculators
Each tool is designed for one specific task, with a clear form and a detailed result area.
02
Compare two dates
Date Difference
Compare two dates in calendar years, months, weeks, and total days.
Open tool03
Workday planning
Business Days Calculator
Count working days while excluding weekends and optional custom dates.
Open tool04
Date adjustment
Add or Subtract Dates
Move a date forward or backward by years, months, weeks, or days.
Open tool05
Event countdown
Days Until a Date
See the time remaining until an event or the time elapsed since it.
Open tool06
Personal countdown
Birthday Countdown
Track the next birthday, remaining days, and the age that will be reached.
Open toolBuilt for practical date questions
Clear calculations without spreadsheets or manual counting
DateKit groups the date calculations people use most often into one consistent toolkit. Each result explains the counting rules and provides several useful formats.
Exact calendar logic
Month lengths, leap years, inclusive ranges, and end-of-month cases are handled explicitly.
Private by default
Dates are processed in the browser and are not sent to an account or stored in a database.
English and Spanish
Every calculator has its own localized route, instructions, result labels, and supporting content.