Quarter Calculator
Find the calendar or fiscal quarter for a date, quarter start and end dates, progress, total days and weekday-only business days.
Business days use a simple Monday-Friday count and do not subtract holidays or local closures.
Date to quarter and quarter to dates
The calculator supports two common search intents: identify which quarter a date falls in, or pick a quarter and get its start and end dates.
m is the month number from 1 to 12 and Qcal is the calendar quarter from Q1 to Q4.
Calendar and fiscal quarters
- Calendar quarters start in January, April, July and October.
- Fiscal quarters depend on the selected fiscal-year start month.
- Progress is based on calendar days in the selected quarter.
- Business days use a simple Monday-Friday count and do not subtract holidays.
Frequently Asked Questions
Sources and References
- Fiscal YearInvestopedia
- The federal budget processUSAGov
- DateMDN Web Docs
- date-fns: differenceInCalendarDaysdate-fns
Calculations are based on the listed reference sources. Links open in a new tab.
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