What is a quarter?
A quarter is one of four three-month periods used to divide a calendar year for reporting, planning, and accounting.
Date & Time
Quarter Calculator
Find the calendar quarter for any date directly in your browser. Calculate Q1, Q2, Q3, Q4, quarter start date, quarter end date, and days remaining.
Tool
Quarter Calculator
Find the calendar quarter for any date directly in your browser. Calculate Q1, Q2, Q3, Q4, quarter start date, quarter end date, and days remaining.
This tool runs in your browser. Your input is processed locally and is not uploaded.
About this Tool
Use this free quarter calculator to find which quarter a date belongs to. Enter any date and instantly see the matching quarter, quarter start date, quarter end date, and remaining days in the quarter.
Conversion Formula
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Calendar quarters divide the year into four three-month periods: Q1 is January to March, Q2 is April to June, Q3 is July to September, and Q4 is October to December.
Examples
- 2026-02-10 belongs to Q1 2026
- 2026-07-01 belongs to Q3 2026
- Find the start and end date of the quarter for reporting or planning
Frequently Asked Questions
Which months are in Q1, Q2, Q3, and Q4?
Q1 is January to March, Q2 is April to June, Q3 is July to September, and Q4 is October to December.
Can this calculate quarter start and end dates?
Yes. The tool can show the first and last date of the quarter for the selected date.
Is this the same as fiscal quarter calculation?
No. This tool uses calendar quarters. For fiscal quarters with a custom fiscal year start month, use the fiscal year calculator.
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