Date & time

Browse 25 Murelio browser utilities for date calculations and timers. Open each focused tool immediately without installing software or creating an account.

• Age Calculator

  Compare a date of birth with a reference date to calculate exact age, year-count age, elapsed time, and time until the next birthday.

• Date Difference Calculator

  Calculate the absolute calendar-day gap between two dates together with direction, weeks, and weekday count.

• Days Between Dates

  Quickly calculate elapsed calendar days between two dates and review equivalent weeks and hours.

• Business Days Calculator

  Count weekdays between two dates by excluding Saturdays and Sundays.

• Add Days to Date

  Add a specified number of calendar days to a selected date and return the resulting date and weekday.

• Subtract Days from Date

  Subtract a specified number of calendar days from a selected date to find the earlier date and weekday.

• Week Number Calculator

  Calculate the ISO week-numbering year and week for a calendar date.

• Day of Year

  Find the 1-based day number of a date within its year, from 1 through 365 or 366.

• Day of Week Finder

  Find the weekday for a selected calendar date with localized weekday names.

• Leap Year Checker

  Determine whether a year is a Gregorian leap year and show whether it contains 365 or 366 days.

• Unix Timestamp Converter

  Convert a Unix timestamp into a date and compare ISO 8601, seconds, milliseconds, and device-local time.

• ISO Date Converter

  Convert a device-local date and time into a UTC ISO 8601 string and Unix timestamps.

• Timezone Offset Calculator

  Get the UTC/GMT offset for a selected instant in one of the provided IANA time zones.

• World Time Converter

  Display a device-local date and time as the corresponding date and time in a selected world time zone.

• Countdown Timer

  Run a 1-999 minute countdown with start, pause, resume, reset, and a short completion sound.

• Stopwatch

  Measure elapsed time with a monotonic browser clock, centisecond display, and lap capture.

• Pomodoro Timer

  Run a configurable focus/break Pomodoro sequence through the final focus round.

• Interval Timer

  Repeat configurable work and rest intervals for a selected number of rounds.

• Metronome

  Play a browser metronome from 30-240 BPM with an accent on the first beat of a repeating four-beat cycle.

• Calendar Generator

  Generate a Sunday-first monthly calendar for a chosen year and month with today's date highlighted.

• Quarter Calculator

  Determine whether a date falls in calendar quarter Q1, Q2, Q3, or Q4.

• Fiscal Year Calculator

  Assign a date to a fiscal-year ending-year label using a selectable fiscal start month.

• Moon Age Estimate

  Estimate lunar phase, moon age, and illumination for a date using a mean synodic-month model.

• Time Duration Calculator

  Break the actual millisecond difference between two local date-times into days, hours, minutes, seconds, and total seconds.

• Decimal Time Converter

  Convert an hh:mm:ss clock time into decimal hours and show equivalent total minutes and seconds.