Date & Time Calculators
Find exact ages, count days between dates, add business days to a deadline, total up work hours or estimate how long a trip or speech will take. Date math that is tedious by hand becomes instant.
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Age Calculator
Calculate exact age from a date of birth: years, months and days, total days lived, the day of the week you were born, and when your next birthday falls.
Date & TimeDays Between Dates Calculator
Count the days between two dates: total days, a years-months-days breakdown, business days and weekend days.
Date & TimeDate Calculator
Add or subtract any number of days, weeks, months or years from a date.
Date & TimeElapsed Time Calculator
Find the time elapsed between a start and end time: hours and minutes, total minutes and decimal hours.
Date & TimeTime and a Half Calculator
Calculate time-and-a-half overtime pay: your 1.
Date & TimeHalf Birthday Calculator
Find your half birthday: exactly six months after your birthday.
Date & TimeCat Age Calculator
Convert your cat’s age to human years with the veterinary model (15 years for year one, +9 for year two, +4 after).
Date & TimeTravel Time Calculator
Work out travel time from distance and speed — or solve for distance or average speed instead.
Date & TimeLead Time Calculator
Add a supplier lead time to an order date — in calendar days or business days — to get the expected delivery or completion date.
Date & TimeCourt Date Calculator
Estimate a filing deadline by adding calendar days, or court days that skip weekends and US federal holidays, to a trigger date.
Date & TimeSpeech Time Calculator
Estimate speaking time from your script text or word count at slow, average or fast speaking rates.
Date & TimeHours Calculator
Calculate work hours from clock-in and clock-out times, minus unpaid breaks.
Date & TimeDoubling Time Calculator
Find how long growth at a fixed rate takes to double: the exact answer plus the Rule of 70 and Rule of 72 estimates used in finance and biology.