Quarter of the year calculator
Handy for quarterly reports, filings and budgets, whether your fiscal year starts in January or another month.
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Processing and privacy: The result is calculated inside your browser and your data is not sent to any server.
How to use it
- Enter date and fiscal year starts in.
- The result appears straight away and updates as you edit.
- Copy the result, or copy a link that keeps the same values to share it.
How it is calculated
Offset = (month − fiscal start month + 12) mod 12, and quarter = ⌊offset ÷ 3⌋ + 1. The quarter starts on the 1st of the month (offset mod 3) months back and runs 3 months.
Example
Inputs: Date = 2026-10-01, Fiscal year starts in = January (calendar year). Result: Quarter: Q4; Quarter starts: Thursday, October 1, 2026 (2026-10-01); Quarter ends: Thursday, December 31, 2026 (2026-12-31).
Limits and caveats
- Assumes quarters of 3 whole calendar months and does not cover week-based calendars such as 4-4-5.
Questions about this tool
What are the calendar quarters?
Q1 is January to March, Q2 April to June, Q3 July to September and Q4 October to December.
When should I change the fiscal start?
When your company or agency starts its financial year in a month other than January, such as April or July.
Is the entered day in the days left?
No, days left run from the next day to the last day of the quarter.