Full-Time Equivalent (FTE) Calculator

The Full-Time Equivalent (FTE) calculator converts mixed full-time and part-time schedules into a single staffing capacity number. Headcount tells you how many people are on the roster; FTE tells you how many full-time schedules their hours represent. That distinction matters for labor budgets, coverage plans, productivity analysis, grant reporting, benefits thresholds, and executive dashboards.

This calculator is intentionally capacity-focused. It adds weekly hours from full-time and part-time employees, then divides by the weekly hours that count as one full-time schedule. If your question is about people leaving, use the attrition rate calculator or employee turnover rate calculator. If your question is about how much output those hours create, use the productivity calculator.

How to use this calculator

Enter the number of full-time employees and the hours per full-time employee. The default full-time standard is 40 hours per week, but you should change it if your organization defines full time as 35, 37.5, or another schedule. Then enter the number of part-time employees and the average weekly hours per part-time employee.

If part-time schedules vary widely, use a weighted average or run several scenarios. For example, ten employees at 10 hours and five employees at 30 hours should not be averaged casually if the groups serve different roles. Formal reporting is best done from payroll hours, but this calculator gives a transparent planning estimate.

Formula

The calculator first totals full-time weekly hours:

$\text{full-time weekly hours} = \text{full-time employees} \times \text{hours per full-time employee}$

Then it totals part-time weekly hours:

$\text{part-time weekly hours} = \text{part-time employees} \times \text{hours per part-time employee}$

Total weekly hours are the sum of those two amounts:

$\text{total weekly hours} = \text{full-time weekly hours} + \text{part-time weekly hours}$

Finally, total hours are divided by the full-time standard:

$\text{FTE} = \frac{\text{total weekly hours}}{\text{hours per full-time employee}}$

Part-time FTE, shown in the result list, is:

$\text{part-time FTE} = \frac{\text{part-time weekly hours}}{\text{hours per full-time employee}}$

This calculator-defined scenario is not a rule, standard, legal conclusion, forecast, or universal convention.

Worked example

Suppose a department has 3 full-time employees, each scheduled for 40 hours per week. It also has 5 part-time employees, each averaging 20 hours per week. Full-time weekly hours are:

$3 \times 40 = 120$

Part-time weekly hours are:

$5 \times 20 = 100$

Total weekly hours are:

$120 + 100 = 220$

FTE is:

$\frac{220}{40} = 5.5$

The calculator therefore reports 5.5 FTE, 220 total weekly hours, 120 full-time weekly hours, 100 part-time weekly hours, and 2.5 part-time FTE. Notice that the headcount is eight people, but the capacity is five and a half full-time schedules. That is why replacing one full-time employee with two half-time employees can preserve FTE while increasing supervision, scheduling, and benefits administration work.

HR context and benchmarks

FTE is a bridge between payroll, operations, and finance. HR may use it to normalize turnover, absence, or diversity metrics. Finance may use it to build labor budgets. Operations may use it to decide whether service hours can be covered. Executives may use it to compare teams that rely on different mixes of full-time, part-time, seasonal, or temporary labor.

Use FTE with the absence percentage calculator when attendance reports need a labor-capacity denominator rather than a simple employee count. Pair it with the productivity calculator to compare output per FTE instead of output per person. If staffing changes are caused by exits, the employee turnover rate calculator can show churn while FTE shows whether capacity truly fell.

Compliance definitions can differ from internal planning definitions. Some programs define full-time status by monthly hours, some aggregate part-time hours, and some cap a worker at one FTE regardless of overtime. Do not assume that an internal workload FTE is acceptable for taxes, benefits, health coverage, grants, or small-business size standards. Use the calculator to understand the arithmetic, then check the applicable rulebook.

Practical tips

• Decide whether you are measuring scheduled hours, paid hours, or worked hours. They can differ when leave, overtime, or unpaid time is involved.
• Keep the full-time standard visible in every report. A 37.5-hour organization and a 40-hour organization will calculate different FTE from the same total hours.
• Segment temporary, contractor, and seasonal labor if decision-makers need to understand core capacity separately.
• Avoid hiding headcount. A team can have the same FTE after moving to part-time staffing, but manager workload and scheduling complexity may rise.
• Use a payroll export for high-stakes reporting and this calculator for transparent estimates, scenario planning, and sanity checks.
• Recalculate after schedule changes, not just after hires or resignations.

Sources

• IRS, Identifying full-time employees — federal guidance on full-time employee concepts for employer responsibilities.
• HealthCare.gov, FTE employee calculator — public calculator context for full-time equivalent employee counts.
• U.S. Small Business Administration, Table of size standards — examples of program rules that may use employee counts differently.