Date & Time Calculators
Date difference, age calculator, time zone converter, and more.
Showing 12 of 12 calculators
Age Calculator
Calculate your exact age in years, months, and days with our free online age calculator. Enter your birth date to find your precise age instantly.
Date Difference
Calculate the number of days, weeks, and months between two dates with our free online calculator. Find date differences for any two dates instantly.
Business Days
Calculate the number of working days between two dates, excluding weekends. Enter start and end day-of-year to find business days instantly.
Unix Timestamp
Convert Unix epoch timestamps to human-readable date components and vice versa. Enter seconds since January 1, 1970 to decode the date and time.
Week Number
Find the ISO week number for any day of the year. Enter the day-of-year and get the corresponding week number, day within the week, and more.
Date Add/Subtract
Add or subtract days, weeks, and months from a given day-of-year. Compute a future or past date easily with this free calculator.
Time Zone Converter
Convert time between different time zones using UTC hour offsets. Enter a time and source/target offsets to see the converted time instantly.
Countdown Timer
Calculate the days, hours, and minutes remaining until a target date from today. Enter current and target day-of-year for an instant countdown.
Pregnancy Week
Calculate the current pregnancy week and trimester from the number of days since your last menstrual period (LMP). Track gestational progress.
Time Card
Calculate work hours from clock in/out times with break deduction. Enter hours and minutes to compute total work time and gross pay.
Leap Year
Determine whether any given year is a leap year and calculate the total number of days in that year using the Gregorian calendar rules.
Season Calculator
Determine which astronomical season (spring, summer, fall, or winter) any day of the year falls in for the Northern Hemisphere, and how far through the season you are.
Popular from Other Categories
Meters → Feet
Convert meters to feet and inches instantly with our free online calculator. Accurate metric to imperial length conversion with reference table.
KM → Miles
Convert kilometers to miles instantly with our free online calculator. Accurate metric to imperial distance conversion with a handy reference table.
KG → LBS
Convert kilograms to pounds instantly with our free online calculator. Accurate metric to imperial weight conversion with a useful reference table.
°C → °F
Convert Celsius to Fahrenheit instantly with our free online calculator. Accurate temperature conversion with a quick reference table for common values.
Compound Interest
Calculate compound interest with monthly contributions using our free calculator. See how your investments grow over time with detailed projections.
Mortgage Payment
Calculate your monthly mortgage payment with our free calculator. See total interest costs and payment breakdowns for any loan amount and interest rate.