Quarter Calculator
Quarter Calculator
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What Is a Quarter Calculator?
A quarter calculator tells you which quarter of the year a given date falls into. The calendar year is divided into four three-month quarters — Q1, Q2, Q3, and Q4 — that businesses, accountants, and analysts use for financial reporting, planning, and performance tracking. Instead of counting months in your head, you enter any date and instantly see its quarter along with the quarter's start date, end date, how far through the quarter you are, and how many days remain.
Our free online quarter calculator works entirely in your browser, needs no sign-up, and updates instantly. It's handy whether you're closing the books, scheduling quarterly reviews, planning OKRs, forecasting revenue, or simply answering the everyday question, "what quarter are we in right now?"
It supports both the standard calendar year and common fiscal year setups, so it works for personal planning and for organizations whose financial year doesn't start in January.
Calendar Quarters (Q1–Q4)
Q1: January – March
The first quarter runs from January 1 to March 31 and typically covers 90 days (91 in a leap year). It's when many companies set annual goals and budgets.
Q2: April – June
The second quarter runs from April 1 to June 30 (91 days). It closes out the first half of the year and is a common checkpoint for mid-year reviews.
Q3: July – September
The third quarter runs from July 1 to September 30 (92 days). It opens the second half of the year and often anchors back-to-school and pre-holiday planning.
Q4: October – December
The fourth quarter runs from October 1 to December 31 (92 days). For many businesses it's the biggest sales period and the run-up to year-end reporting.
Fiscal Quarters vs. Calendar Quarters
A calendar quarter always starts in January. A fiscal quarter follows an organization's fiscal year, which can begin in any month. Because of this, the same date can be Q3 on the calendar but Q1 for a company whose fiscal year starts in July. Common fiscal years include:
- U.S. Federal Government: fiscal year runs October 1 – September 30, so FY Q1 is Oct–Dec.
- United Kingdom (government/tax): fiscal year runs April 6 – April 5; many UK businesses use April 1 – March 31, making Q1 Apr–Jun.
- Many corporations (e.g. retail/tech): choose a fiscal year ending after their peak season, such as June 30 or January 31.
When you need fiscal quarters, set your fiscal year start month and the calculator maps each date to the correct fiscal Q1–Q4.
Frequently Asked Questions
What quarter is it right now?
By the calendar year, the current quarter depends on today's month: January–March is Q1, April–June is Q2, July–September is Q3, and October–December is Q4. Enter today's date (or any date) in the calculator above and it will show the exact quarter, its start and end dates, and how many days are left in it.
How do I calculate which quarter a date is in?
For calendar quarters, take the month number, divide by 3, and round up: months 1–3 = Q1, 4–6 = Q2, 7–9 = Q3, 10–12 = Q4. For fiscal quarters you first shift the month by your fiscal year's start month, then apply the same rule. The calculator does this automatically for any date you enter, so you don't have to do the math.
What is the difference between a fiscal quarter and a calendar quarter?
A calendar quarter always begins in January (Q1 = Jan–Mar). A fiscal quarter follows an organization's fiscal year, which can start in any month. For example, the U.S. federal fiscal year starts in October, so its Q1 is October–December. That means the same date can be in different quarters depending on whether you use the calendar or a fiscal calendar.
How many days are in each quarter?
In a standard year: Q1 has 90 days (91 in a leap year), Q2 has 91 days, and Q3 and Q4 each have 92 days. Quarters are based on whole calendar months rather than an even split of the year, which is why the day counts differ slightly.
Is this quarter calculator free to use?
Yes. The quarter calculator is completely free, requires no account or sign-up, and runs entirely in your browser — nothing you enter is uploaded to a server. It works on desktop and mobile, and you can use it as often as you like.