Age, date differences, Gregorian and Hijri calendars, time zones, and event planning. Everything you need in one place, from everyday math to specialist tools.
Desktop app
Pin any planning tool to your desktop so it stays above other programs even after you close the browser. Pick the clock, timer, countdown or any other planning calculator.
Windows 10/11 · Free
Download the ZIP, extract it, then run RaqamLabDesktop.exe. If SmartScreen appears, choose More info then Run anyway. The app lives in the system tray and lets you open any tool from its menu.
The browser widget only lives inside the page; the desktop app is what keeps it after closing.
All tools are grouped into sections so you can find what you need quickly.
Age in years, months and days, age in days and hours, date differences, adding days and months, remaining days, service length, and work duration.
Calculate your age in years, months and days, and find your next birthday.
Open calculatorCalculate your age in days, hours and minutes, with an optional birth time for greater precision.
Open calculatorFind how many days remain until a date, with weeks and business days for future dates.
Open calculatorAdd a number of days to any date and get the new date and weekday.
Open calculatorCalculate net working hours between start and end times with a break deduction, including overnight shifts.
Open calculatorFind the number of days, weeks and months between any two dates.
Open calculatorSubtract a number of days from any date to find the earlier date and weekday.
Open calculatorAdd months or years to a date and get the new date, with a note when the day is clamped to month end.
Open calculatorCompare two event dates, count the days between them, and see the countdown from today to each.
Open calculatorCalculate service or employment length between two dates in years, months and days, with total months and decimal years.
Open calculatorGregorian and Hijri conversion, weekday lookup, days in a month or year, leap years, week numbers, business days, and public holidays.
Convert dates between the Gregorian and Hijri calendars in both directions, with the weekday and a one-day variance note.
Open calculatorCount business days between two dates while excluding the weekly weekend and any official holidays you add.
Open calculatorFind the estimated Hijri date for any Gregorian day, with year, month and day details and a moon-sighting note.
Open calculatorList expected public holidays for a country and year, with Gregorian dates, weekdays and a change notice.
Open calculatorFind how many days remain until the end of the year, with remaining business days and the year's remaining share.
Open calculatorFind the weekday for any Gregorian date, with its day-of-year number and week number.
Open calculatorFind the number of days in any month and year, with the first and last weekday and leap-year status.
Open calculatorCheck whether a year is a leap year, with its length, February days and nearby leap years.
Open calculatorFind the ISO 8601 week number for any date, with the week's start, end and day position.
Open calculatorFind the day-of-year number, the days left, the elapsed percentage, and the week number.
Open calculatorCity time differences, UTC to local time, meeting duration across zones, 12/24-hour format, overtime, and task start and end times.
Compare the time in two cities, see the difference in hours and minutes, and view each local time.
Open calculatorConvert a UTC date and time to the local time of any city, with the offset and weekday.
Open calculatorPlan an international meeting: enter the start time in one city and the duration, then see start and end times in other cities.
Open calculatorConvert time between 12-hour and 24-hour formats, with a clear Arabic form and minutes since midnight.
Open calculatorCalculate overtime after breaks against standard working hours, with overnight shift support.
Open calculatorCalculate the time elapsed since a moment in days, hours and minutes, with a calendar breakdown in years and months.
Open calculatorFind a task's end time from its start and duration, or its start from its end, with overnight detection.
Open calculatorEstimated due date, weeks remaining, event countdowns, installment dates, study days, shift schedules, project duration, and floating clocks.
Estimate a due date from the last period, conception date or ultrasound scan, with a clear estimate disclaimer.
Open calculatorA precise countdown to an event in days, hours and minutes, with the event name and weekday.
Open calculatorA digital or analog clock shown as a floating layer over the page, draggable anywhere with multiple styles.
Open calculatorFind a project's finish date from the required working days, excluding the weekly weekend and official holidays.
Open calculatorA floating countdown clock: set minutes and seconds, start, pause, reset and drag it anywhere.
Open calculatorFind how many weeks and days remain until a date, with the full date and weekday.
Open calculatorA floating stopwatch that measures elapsed time, draggable anywhere with start, pause and reset.
Open calculatorGenerate a schedule of installment due dates from the first payment date, count and frequency.
Open calculatorCalculate actual school days in a term after excluding the weekly break and school holidays.
Open calculatorGenerate a shift schedule for chosen days using two-shift, three-shift or 2-on/2-off patterns.
Open calculatorArithmetic, percentages, algebra, geometry and advanced math.
View allLength and distance, weight and mass, area, volume, temperature and pressure, speed, energy, and data.
View allBody indicators, calories and nutrition, fitness and running, sleep, water, and pregnancy age.
View allTaxes, discounts, loans and interest.
View all