MihsabaShift lengths and breaks
Enter start, end and break time; check crossing midnight. Weekly repetition assumes identical shifts and does not infer overtime rules.
Quick example: 09:00 to 17:30 with a 30-minute break gives 8 net hours.
Date & Time
Date and time tools calculate age and the difference between dates while accounting for calendar dates.
Choose a calculator for your question
Start with the problem, then choose the tool matching your known quantities. Each topic includes an illustrative example and links to the relevant calculators.
Calendar days, business days and date shifts
Elapsed days differ from business-day counts. Select weekends and enter holidays manually; adding a calendar month does not always mean adding 30 days.
Quick example: Adding one month to 31 January 2024 gives 29 February 2024 through end-of-month clamping.
Relevant tools
Age at a reference date
Use birth and reference dates for calendar years, months and days. Total days or weeks describe the duration differently; years are not converted with one fixed multiplier.
Quick example: From 1 January 2000 to 1 January 2025 is 25 full years, or 300 calendar months.
Relevant tools
Available calculators
Calculate age, durations, and differences between dates.
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Age Calculator – Exact Age, Days & Next Birthday
Calculate exact age on any reference date in years, months and days, plus total months, weeks and days, birth weekday and next birthday.
⏱Hours Calculator – Hours Worked & Decimal Hours
Calculate hours and minutes between two times, subtract unpaid breaks, handle overnight shifts, convert to decimal hours and total minutes, and optionally estimate pay.
↔Date Difference Calculator – Days Between Two Dates
Calculate the exact number of days between two dates and compare standard versus inclusive day counting for trips, deadlines, projects and date intervals.
⏱Time Duration Calculator
Calculate elapsed time between a start and end time in hours, minutes and decimal hours, including overnight spans and an optional break.
±📅Date Add/Subtract Calculator
Add or subtract years, months, weeks and days from a date with month-end clamping, leap-year handling and weekday output.
📅✓Business Days Calculator – Count, Add & Subtract
Count business days between dates or add/subtract working days, with selectable weekend rules and optional custom holidays.
⏱✓Work Hours Calculator
Calculate net worked time from start, end and unpaid break, including overnight shifts and optional hourly-pay projections.
How to choose a calculator
Select the dates carefully. A date difference can differ from inclusive counting that includes both endpoints.
Frequently asked questions
Are leap years reflected?
The tools use actual calendar dates, so calendar day differences are reflected.