All Calculators
Browse our full collection of free, accurate online tools
Date Difference Calculator
Calculate exact days, weeks, months, and years between any two dates. Accounts for leap years and varying mon…
Use Calculator → 🎂Age Calculator
Calculate your exact age in years, months, days, hours, and minutes. See your upcoming birthday countdown.
Use Calculator → 🕐Unix Timestamp Converter
Convert Unix timestamps to dates and dates to timestamps. Auto-detects seconds and milliseconds formats.
Use Calculator → 🔄Date Format Converter
Convert dates between MM/DD/YYYY, DD/MM/YYYY, YYYY-MM-DD, and other international formats. Avoid date confusi…
Use Calculator → 💼Business Days Calculator
Count business days between dates or add working days to a date. Optionally exclude public holidays by countr…
Use Calculator → 📊Week Number Calculator
Find ISO week numbers for any date. Look up date ranges for any week number. Used in business and manufacturi…
Use Calculator → ⏳Countdown Timer
Create countdowns to events, deadlines, and milestones. See days, hours, minutes, and seconds remaining in re…
Use Calculator → 🗓️Calendar Generator
Generate printable calendars for any month or year. Customize start day, add holidays, and choose layout styl…
Use Calculator → ⭐Zodiac Sign Calculator
Find your zodiac sign from your birthdate. See characteristics, compatibility, element, and ruling planet inf…
Use Calculator → 🌙Moon Phase Calculator
Find moon phases for any date. Current illumination, upcoming full and new moons, and monthly lunar calendar.
Use Calculator → 🎂Age Calculator
Find out your exact age in years, months, days, hours, and minutes — from any birth date to today or a custom…
Use Calculator → 📅Date Difference Calculator
Calculate the exact difference between any two dates in days, weeks, months, and years — with an option to ex…
Use Calculator → ➕Add or Subtract Days from a Date
Add or subtract any number of days, weeks, months, or years from a starting date and instantly see the result…
Use Calculator → ⏳Countdown Timer to a Date
Set any future date and watch a live countdown tick down the exact days, hours, minutes, and seconds remainin…
Use Calculator → 🌍Time Zone Converter
Convert any time between any two time zones instantly — DST offsets handled automatically so you never have t…
Use Calculator → 🔢Unix Timestamp Converter
Convert Unix epoch timestamps to human-readable dates and back, supporting both seconds and milliseconds form…
Use Calculator → 💼Business Days Calculator
Count working days between any two dates by excluding weekends and the specific holidays that apply to your s…
Use Calculator → 📆Week Number Calculator
Find the ISO week number for any date instantly, along with the Monday start and Sunday end of that week — us…
Use Calculator → ⌛Duration Calculator
Enter any two timestamps and instantly get the exact elapsed duration broken down into days, hours, minutes, …
Use Calculator → 🗓️Day of the Week Finder
Find out which day of the week any date falls on — past or future, from ancient history to centuries ahead — …
Use Calculator → 🤰Pregnancy Due Date Calculator
Find out your estimated due date and current pregnancy week using either your last menstrual period or confir…
Use Calculator → 🔄Date Format Converter
Convert any date between ISO 8601, US, European, and custom formats instantly — no guesswork, no misread mont…
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