Date & Time
Calculate age, date differences, add days, and working days between dates.
Add Days to Date
Free add days to date calculator to find a future or past date by adding or subtracting days. Perfect for deadlines, due dates, and event planning.
Age Calculator
Free age calculator to find your exact age in years, months, days, hours, and total days from your date of birth. Works for any birthdate instantly.
Countdown Timer
Free countdown timer calculator to find exactly how many days, hours, and minutes remain until any target date. Great for events, holidays, and deadlines.
Date Difference Calculator
Free date difference calculator to find the exact number of days, weeks, months, and years between any two dates. Useful for age gaps, project timelines, and more.
Day Count Calculator (Finance)
Free financial day count calculator using Actual/365, Actual/360, and 30/360 conventions. Essential for bond pricing and interest accrual calculations.
Day of Year Calculator
Free day of year calculator to find what day number (1–365 or 366) any date falls on. Includes days remaining in the year and leap year detection.
Duration Converter
Free duration converter to convert between seconds, minutes, and hours instantly. Enter any time duration and get the equivalent in all formats at once.
Time to Seconds Converter
Free time to seconds converter to convert hours, minutes, and seconds into total seconds. Useful for video editing, athletics timing, and data processing.
Leap Year Checker
Free leap year checker to instantly verify if any year is a leap year. Shows the number of days in February and explains the leap year rule clearly.
Timestamp to Date
Free Unix timestamp to date converter to transform epoch time into a human-readable date and time format. Supports seconds and milliseconds timestamps.
Time Zone Converter
Free time zone converter to convert any time between different world time zones instantly. Supports UTC, EST, PST, IST, GMT, and all major time zones.
Unix Timestamp Converter
Free Unix timestamp converter to convert any date and time to a Unix epoch timestamp in seconds since January 1, 1970. Essential for developers and APIs.
Week Number Calculator
Free week number calculator to find the ISO week number and day of the week for any date. Useful for project planning, payroll, and scheduling tasks.
Working Days Calculator
Free working days calculator to count business days between two dates, excluding weekends. Perfect for project deadlines, delivery estimates, and HR planning.