⏰ Time & Date
Calculate ages in years and months, add or subtract dates, measure time durations, find week numbers, and convert Roman numerals. Privacy-focused, all calculations happen locally without storing personal data.
Age Calculator
Calculate exact age in years, months, days, hours, minutes, and seconds. Track birthdays and anniversaries.
Date Calculator
Add or subtract days, weeks, months, and years from any date. Calculate business days and date differences.
Time Duration Calculator
Calculate time spans between two times. Add, subtract, multiply, and divide hours, minutes, and seconds.
Decimal Time Converter
Convert time to decimal hours for payroll. Convert decimal hours back to hours:minutes format.
Week Number Calculator
Find ISO week numbers and convert between dates and week numbers for any date.
Roman Numeral Converter
Convert between Arabic numbers and Roman numerals. Perfect for years, dates, and historical references.