Useful Calculators & Online Tools
Fast, accurate, and simple calculators you can use every day — no login, no clutter.
Popular Tools
Age Calculator
OpenCalculate your exact age in years, months, and days from your date of birth.
Add Days to Date
OpenAdd a specified number of days to a given date.
Countdown
OpenCreate a countdown to any future date and time.
Date Difference
OpenCalculate the difference between two dates.
Days Between Dates
OpenFind the number of days between two specific dates.
Working Days
OpenCalculate the number of working days between two dates, excluding weekends.
Browse by category
Time & Date
Fast, accurate date calculations and time utilities.
Converters
Simple unit conversions for everyday use.
Finance
Practical calculators for loans, savings, and money planning.
Tip: Bookmark your most-used tools. We’re building more calculators over time.