Quarter Calculator
Which quarter a date falls in — calendar or fiscal — with the quarter’s first and last days, how many days are left in it, and the quarter and year labels planners use.
Quarters are three-month blocks counted from the start of the year.
How the quarter calculator works
Quarters are three-month blocks counted from the start of the year. For a calendar year that is January; many organisations count from a different month — July in Australia, April in the UK public sector and India, October for the US federal government — so the fiscal quarter can differ from the calendar one. Enter the month the year starts in and the calculator labels the quarter and fiscal year accordingly.
Formula: quarter = floor(months since the year start ÷ 3) + 1
Worked examples
| Inputs | Quarter | Note |
|---|---|---|
| 15 August 2026, July fiscal year | Q1 of FY2026–27 | Q1 of FY2026–27 |
| 15 August 2026, calendar year | Q3 2026 | Q3 2026 |
| 10 February 2027, April fiscal year | Q4 of FY2026–27 | Q4 of FY2026–27 |
FAQFrequently asked questions
Which quarter is July in?
Q3 of the calendar year, but Q1 of a July–June fiscal year (Australia, New Zealand) and Q2 of an April–March one (UK government, India, Japan). Pick the fiscal-year start month to get the label your organisation uses.
How is the fiscal year named?
Usually by the calendar year in which it ends — FY2026–27 runs July 2026 to June 2027 and is called FY27 in shorthand. The US federal year starting October 2026 is FY2027.
Why does the days-left row include today?
Because today is still available to act in; a quarter ending today has one day left, not zero. The elapsed share counts days already gone.
Do quarters have equal length?
No — 90 to 92 days, depending on which months they contain and leap years. Q1 of a calendar year is the shortest.
Where these figures come from
- ISO 8601 — Date and time — Representations for information interchange — the yyyy-mm-dd format and the week-numbering rules used here
- US Naval Observatory — Calendars — the Gregorian leap-year rule
- GOV.UK — bank holidays — bank holidays by nation (not applied here)
Last checked: September 2026. The Gregorian calendar rules do not change; working-day counts exclude Saturdays and Sundays only.