Date & time utilities
Free calculators for calendar days, business and working days, payroll estimates, countdowns, and time conversions. Enter your dates or amounts and get clear results in seconds.
Fast starting points for the most common date and time questions.
Calculate the number of days between two calendar dates.
Find your exact age in years, months, and days.
Count working days between dates, excluding weekends.
Shift a date forward or backward by days, weeks, or months.
Create a countdown to any future date and time.
Find the exact difference between two dates in days, hours, minutes, and seconds.
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Count calendar days, age, and precise differences between dates.
Calculate the number of days between two calendar dates.
Find your exact age in years, months, and days.
Shift a date forward or backward by days, weeks, or months.
Find the exact difference between two dates in days, hours, minutes, and seconds.
Count business days between dates, excluding weekends and optional holidays.
Count working days between dates with weekend exclusion and optional US holiday samples.
Prorate salary or rent, total weekly hours, and estimate overtime gross pay.
Calculate partial-period pay from annual salary and calendar days worked.
Estimate prorated rent for partial-month move-in or move-out dates.
Total weekly work hours and split regular vs overtime using a threshold.
Estimate gross pay with regular and overtime hours at a custom multiplier.
Track time remaining until a target date and time.
Reformat dates, Unix timestamps, and time zones.
Pick a calculator from the categories below or use search in the header. Each page explains what it counts, which inputs it needs, and how to read the output.
Most tools update results as you type. Country and year pages show pre-calculated summaries for common planning questions.
Spreadsheets and mental math work, but a focused calculator saves time when you only need one answer—days until a deadline, prorated rent for a partial month, or hours over a weekly threshold.
Pages are written in plain language with related tools linked on each calculator so you can move between similar tasks without hunting for URLs.
Holiday calendars and payroll outputs are simplified models. They do not replace HR systems, legal advice, or official government publications.
Read the disclaimer on each calculator page for category-specific notes.
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