Free Date & Time Tools Online
Scheduling across time zones, counting down to a launch, or figuring out someone\'s exact age — date math is fiddly and easy to get wrong. NToolHub\'s date and time tools handle leap years, ISO week numbers, and daylight-saving-aware conversions correctly, so you don\'t have to think about edge cases.
Age Calculator
Enter your date of birth and get your exact age in years, months and days - plus total days lived and a next-birthday countdown. Free, private, no sign-up.
Open tool →Business Days Calculator
Count business days between two dates, skipping weekends and your custom holidays. Free online calculator with a full breakdown - no sign-up needed.
Open tool →Calendar Week Calculator
See the full Monday-to-Sunday calendar week for any date, with its ISO week number and date range. Free, instant results - no sign-up required.
Open tool →Countdown To Date
Create a live countdown to any date and time - days, hours, minutes and seconds ticking every second. Free online countdown timer, no sign-up needed.
Open tool →Current Time
See the exact current time: local, UTC, Unix timestamp and ISO 8601, all updating live every second with one-click copy buttons. Free, no sign-up.
Open tool →Date Add Subtract
Add or subtract days, weeks, months or years from any date and instantly see the resulting date and its weekday. Free online calculator, no sign-up.
Open tool →Date Difference
Get the exact years, months and days between any two dates, plus totals in days, weeks and hours. Calendar-accurate, private and free - no sign-up.
Open tool →Date Format Converter
Convert any date into 12+ formats: ISO 8601, US, European, long, short, RFC 2822, SQL and Unix timestamp. Free with copy buttons, no sign-up.
Open tool →Day Of Year Calculator
Find the day-of-year number for any date, plus days remaining in the year, ISO week number and quarter. Instant, free and private - no sign-up.
Open tool →Days Between Dates
Count days between any two dates free with NToolHub. Get exact days, weeks, months, hours and minutes with DST-safe math. No sign-up needed.
Open tool →Days In Month
Look up how many days any month has, with a full Monday-first calendar table and weekday counts included. Leap years handled. Free, no sign-up.
Open tool →Days Since Date
See exactly how much time has passed since any past date - in days, weeks and months, with the weekday shown. Free online calculator, no sign-up.
Open tool →Days Until Date
Count down the days, weeks and months remaining until any future date, with the weekday it lands on shown. Free online calculator, no sign-up.
Open tool →Leap Year Checker
Instantly check whether any year is a leap year, see the simple rule behind it, and browse a list of upcoming leap years. Free online tool, no sign-up.
Open tool →Meeting Time Converter
Pick a meeting time in your time zone and instantly see the local time for attendees in major cities worldwide. Free for global teams, no sign-up.
Open tool →Time Addition Calculator
Add up multiple time durations at once - paste one per line and get instant totals in hours, decimal hours and minutes. Free, no sign-up needed.
Open tool →Time Duration Calculator
Calculate the exact duration between any two times, including overnight spans. Results in hours, minutes and decimal hours. Free, no sign-up.
Open tool →Time Subtraction Calculator
Subtract one time from another and see the signed difference in hours and minutes, including negative results shown. Free online tool, no sign-up.
Open tool →Time Zone Converter
Convert any date and time between 28 world time zones with daylight saving handled automatically. Free converter with swap button, no sign-up.
Open tool →Time Zone Overlap
Find the shared 9-to-5 working hours between any two time zones for easy global meeting scheduling across the world. Free online tool, no sign-up.
Open tool →Timestamp Generator
Generate the current Unix timestamp in seconds and milliseconds, plus ISO 8601, UTC and local strings - live with copy buttons. Free, no sign-up.
Open tool →Unix Timestamp Converter
Convert Unix timestamps to readable dates and back, with automatic seconds and milliseconds detection built in. Free epoch converter, no sign-up.
Open tool →Week Number Calculator
Get the ISO 8601 week number for any date, plus the ISO year, weekday name and the week’s full Monday-to-Sunday range. Free online tool, no sign-up.
Open tool →Working Days Calculator
Add or subtract working days from any date, skipping weekends and your custom holidays. Free calculator with the result weekday, no sign-up.
Open tool →World Clock
Live world clock showing the current time in 12 major cities around the globe, updating every second. Switch 12/24-hour formats. Free, no sign-up.
Open tool →About Our Date & Time Tools
Live clocks, converters, and calculators below — all computed instantly in your browser.