Date & Time Calculators
Work with calendars, durations, timestamps, and scheduling utilities. Handy for planning events, deadlines, and time-zone aware calculations.
Date Duration
Calculate the duration between two dates in years, months, and days.
Date +/-
Add or subtract years, months, and days from a date.
Workday Calculator
Calculate working days between dates, excluding weekends and holidays.
Time Zone Converter
Convert time across multiple time zones instantly.
Week Number Calculator
Find the ISO week number for any date, with week boundaries and days remaining.
Leap Year Calculator
Check if any year is a leap year and find upcoming leap years.
Quarter Calculator
Find the calendar and fiscal quarter for any date with days remaining.
Calendar
Interactive monthly calendar with week numbers, day info, and quick navigation.
Holiday Calendar
Public holidays for 150+ countries. Filter by type and region.
Festival Calendar
Religious & cultural festivals across Hindu, Islamic, Christian, Sikh, Buddhist, and Jewish traditions.
Age Calculators Hub
Browse all age calculators: Korean age, birthday countdown, pet age, zodiac, and school admission tools.
Korean Age Calculator
Calculate international, traditional, and year age using all three Korean age systems.
Age Difference Calculator
Find the exact age gap between two people in years, months, and days.
Birthday Countdown Calculator
Count days and hours until your next birthday.
Age in Months Calculator
Convert birth date to total months for babies and pediatric forms.
School Admission Age Calculator
Check CBSE and ICSE school admission age eligibility by date of birth.
Half Birthday Calculator
Find your half birthday date and days until you turn half a year older.
Cat Age Calculator
Convert cat years to human years using veterinary aging stages.
Chinese Zodiac Calculator
Find your Chinese zodiac animal and element from your birth year.
Zodiac Sign Calculator
Discover your Western sun sign from your birth date.
Planetary Age Calculator
See how old you would be on Mars, Jupiter, and other planets.
Clock
Full-screen live digital clock with timezone support, 12/24h format, and millisecond precision.
Stopwatch
Precise stopwatch with lap splits and millisecond accuracy.
Reaction Time Calculator
Measure your visual reflex speed in milliseconds and compare to gamer and F1 benchmarks.
Timer
Set a countdown with presets, keyboard shortcuts, full-screen mode, and alarm.
Countdown Timer
Create a live countdown to any date, event, or deadline.
Time Duration Calculator
Calculate the exact duration between two clock times. Handles midnight crossovers.
Time Card Calculator
Weekly timesheet: enter daily start/end times and breaks to calculate total hours and pay.
Hours & Minutes Calculator
Add or subtract multiple time durations. Perfect for tracking project or travel time.
Unix Timestamp Converter
Convert between Unix epoch timestamps and human-readable dates.
World Clock
Compare current time across multiple cities and time zones.
Sunrise Sunset Calculator
Find sunrise, sunset, and day length for any location and date.
Cron Schedule Generator
Build, validate, and understand cron expressions with a visual builder and execution forecast.
Date & Time Calculators
Browse date & time calculators.
Add Time Calculator
Free add time calculator.
Business Days Calculator
Free business days calculator.
Working Days Calculator
Free working days calculator.
Audiobook Listening Time Calculator
Free audiobook listening time calculator.
Binge Watching Time Calculator
Free binge watching time calculator.
Book Reading Time Calculator
Free book reading time calculator.
Egg Boiling Time Calculator
Free egg boiling time calculator.
BPM to Milliseconds Calculator
Free bpm to milliseconds calculator with shareable results.