FTE Calculator: How to Calculate Full-Time Equivalent (With Examples)

You have 20 people on the payroll, but nobody works the same hours. Your accountant asks how many FTEs you have, your insurance broker asks the same question with a different definition, and your district manager wants to know why labor hours went up when headcount didn’t move.

Headcount can’t answer any of those questions. FTE can, as long as you know which FTE you’re being asked for.

What is an FTE?

FTE stands for full-time equivalent. It converts a mixed team of full-timers, part-timers and on-call staff into one number: how many full-time people the hours you use would represent.

One FTE is one person working your full-time schedule. Someone working 20 hours in a 40-hour business is 0.5 FTE. Two of them together make 1.0 FTE, even though there are two names on the schedule, two uniforms and two sets of availability to juggle.

Here’s the catch. There’s no single legal definition of full time in the US. The Department of Labor says it plainly: the Fair Labor Standards Act “does not define full-time employment or part-time employment.” So the base you divide by is a choice, and different organizations make different choices.

How do you calculate FTE?

The formula fits on a sticky note:

FTE = total hours worked in the period ÷ full-time hours for the same period

Weekly, that means dividing by 40 if your full-time week is 40 hours. Annually, it means dividing by 2,080 (40 hours × 52 weeks). The period doesn’t matter much. Consistency does.

Take a 60-seat diner in Columbus, Ohio, with 20 people on the roster and a 40-hour full-time week. Here’s one ordinary week in October:

Twenty people, 13.55 FTE. The average person on that roster is about 0.68 of a full-timer, which is typical for restaurants and a big reason why headcount is such a misleading number in hospitality.

Change the base and the answer moves. The same 542 hours give 14.45 FTE on a 37.5-hour week and 15.49 FTE on a 35-hour week. Nobody is wrong; they’re just answering different questions. Pick one base, write it down, and stick to it.

Build the FTE calculator in a spreadsheet

You don’t need special software for a first version. In Excel or Google Sheets, put employee names in column A, their hours for the period in column B, and your full-time hours for that same period in cell E1 (40 for a week, 173.33 for an average month, 2,080 for a year).

Copy C2 down the column and you have a working FTE calculator. Add a column for location or department and a pivot table will give you FTE by site in about thirty seconds.

One practical warning. Decide upfront which hours you feed it. Contracted hours, scheduled hours and clocked hours give three different FTE figures, and they drift apart fast in shift work. The mistake we see most at Shyfter is a manager budgeting on contracted hours while payroll runs on clocked hours, then wondering where the extra 1.5 FTE came from. It came from the gap between the two: late clock-outs, last-minute cover, the Saturday that ran long.

Which full-time base should you use?

It depends on who’s asking. Your own staffing plan can use any base that matches how your business runs. Regulators and statisticians each have theirs, and they don’t agree with each other.

That last row matters if you run teams on both sides of the Atlantic. A hotel in Ghent with a 38-hour full-time week and a sister property in Boston on 40 hours can’t compare FTE figures directly. Convert both to hours first, then to FTE on a single base, or the Belgian site will look overstaffed by 5% on paper.

How do you calculate FTE for the ACA?

This is the one that carries a real financial consequence. Under the Affordable Care Act, an employer with at least 50 full-time employees, including full-time equivalents, on average during the prior calendar year is an applicable large employer (ALE). ALEs are subject to the employer shared responsibility provisions, which means offering affordable coverage to full-time employees or risking a penalty.

The IRS method is specific, and it doesn’t use 40 hours at all:

1. Count your full-time employees for each month: anyone averaging at least 30 hours of service a week, or at least 130 hours in the month.
2. Add up the hours of service of everyone else for that month, counting no more than 120 hours per person.
3. Divide that total by 120. The result is your FTE count for the month.
4. Add full-time employees and FTEs for each of the 12 months of the prior year, divide by 12, and drop the fraction.

That last step is in the IRS’s own example: 40 full-time employees plus 15 part-timers working 60 hours a month each gives (480 + 90) ÷ 12 = 47.5, which becomes 47. Not an ALE.

Now a closer call. Picture a bakery chain with three stores in Austin, Texas. Every month it has 38 full-time employees. Its part-timers look like this: nine people working 100 hours a month, six working 60 hours, and one shift lead working 125 hours. That shift lead is under the 130-hour line, so they’re part-time for ACA purposes, and only 120 of their hours count.

Part-time hours: 900 + 360 + 120 = 1,380. Divided by 120, that’s 11.5 FTE. Add the 38 full-timers and the bakery sits at 49.5 every month. Averaged over the year and rounded down: 49. Not an ALE.

Then the owner hires one more part-timer for about 14 hours a week, 60 hours a month, year-round. That’s 0.5 FTE more. The monthly figure becomes 50.0, the annual average is 50, and the business crosses the threshold the following year. One weekend baker.

Two details catch people out. The 120-hour cap means a part-timer on 125 hours a month is worth exactly 1.0 FTE under the ACA, while the same person is only about 0.72 of a 40-hour full-timer in your own staffing math. And there’s a narrow seasonal worker exception: if you exceed 50 for 120 days or fewer in the year, and the people above 50 during that stretch are seasonal workers, you’re not an ALE. Both conditions have to be true.

This article explains the method. It isn’t tax advice, so have your accountant or benefits broker check the final count before you rely on it.

How many FTEs do you actually need?

Reading the FTE you have is half the job. The other half runs the formula backwards: start from demand, not from the roster.

Say the Columbus diner forecasts 600 labor hours a week for the summer patio season. At a 40-hour base, that’s 600 ÷ 40 = 15 FTE. Its people average 0.68 FTE each, so 15 ÷ 0.68 = about 22 people. And that’s before vacations, sick days and the server who only works Fridays. Most restaurant operators we talk to add a cover margin of 10% to 15% on top, which puts the real target at 24 or 25 people on the books.

So when someone says “we need two more people,” ask the next question: two more FTE, or two more names? The answer changes the hiring brief, the payroll forecast and the ACA count all at once.

In the field, this is where a spreadsheet starts to creak. The hours you need for FTE live in three places: the schedule, the time clock and payroll. When they don’t match, your FTE number is a guess. With Shyfter’s staff scheduling, every shift you plan already carries its hours per employee, and the time tracking module records what was actually worked against the plan. The reports then give you planned versus worked hours by team or location, which is exactly the input an FTE calculation needs, without retyping anything.

FTE also pairs naturally with your other labor metrics. If FTE rises while sales stay flat, your labor cost percentage will show it a few weeks later. And if you’re still debating where full time starts in your own policy, our guide to how many hours are considered full-time covers the federal and state rules in detail.

Want to see your team’s planned and worked hours side by side, ready for FTE? Book a free demo of Shyfter and we’ll walk through it on one of your locations.

Frequently asked questions

What does 0.5 FTE mean?

It means a position worked at half of your full-time schedule. On a 40-hour week, 0.5 FTE is 20 hours a week, or about 1,040 hours a year. Two employees at 0.5 FTE add up to one full-time equivalent.

Is FTE based on 40 hours or 37.5 hours?

Either can be right. US employers most often use 40 hours a week, or 2,080 hours a year, for internal planning, while many UK employers use 37.5 hours. What matters is using the same base everywhere, because the same hours give a higher FTE on a shorter full-time week.

Do paid time off and sick hours count toward FTE?

For the ACA calculation, yes: hours of service include hours for which an employee is paid or entitled to payment, such as vacation, holidays and sick leave. For internal staffing, many employers count only hours worked, because that’s the coverage they actually got on the floor. Choose one rule and apply it to everyone.

How many FTEs make an employer an ALE under the ACA?

An employer becomes an applicable large employer when it averages at least 50 full-time employees, including full-time equivalents, over the prior calendar year. Full-time means at least 30 hours a week or 130 hours a month, and FTEs come from part-timers’ hours, capped at 120 each, divided by 120 for each month.