Workforce full-time equivalent roster calculator

Calculate average calendar-exposed FTE by team and total average calendar-exposed FTE with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Use average calendar-exposed FTE by team and total average calendar-exposed FTE to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Contract segments: employee ID, team, weekly hours, start date inclusive, end date inclusive
E1,A,40,2026-10-01,2026-10-31 E2,A,20,2026-10-16,2026-10-31 E3,B,40,2026-10-01,2026-10-15
Reporting period starts, inclusive
2026-10-01
Reporting period ends, inclusive
2026-10-31
Reference full-time weekly hours
40
Average calendar-exposed FTE by team
A: 1.25806451613; B: 0.483870967742
Total average calendar-exposed FTE
1.741935
Average active employee headcount
2
Distinct active employees at period end
2

Try another scenario

Contract segments: employee ID, team, weekly hours, start date inclusive, end date inclusive
E1,A,40,2026-10-01,2026-10-31 E2,A,20,2026-10-16,2026-10-31 E3,B,40,2026-10-01,2026-10-15
Reporting period starts, inclusive
2026-10-01
Reporting period ends, inclusive
2026-10-31
Reference full-time weekly hours
35
Average calendar-exposed FTE by team
A: 1.43778801843; B: 0.552995391705
Total average calendar-exposed FTE
1.990783
Average active employee headcount
2
Distinct active employees at period end
2
Calculation method

Calculation method

Average calendar-exposed FTE by team

For each nonoverlapping employee segment allocate weekly hours/reference hours×overlap calendar days/reporting days, then sum by team.

Total average calendar-exposed FTE

Sum team FTE exposures without capping an individual ratio at one.

Average active employee headcount

Sum nonoverlapping employee-active days/reporting days.

Distinct active employees at period end

Count distinct employee IDs with an active segment covering the final reporting date.

Symbols and units
a
Contract segments: employee ID, team, weekly hours, start date inclusive, end date inclusive
b
Reporting period starts, inclusive
c
Reporting period ends, inclusive
d
Reference full-time weekly hours

Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.

Assumptions & limits

Assumptions & limits

  • A specified contracted-hours/calendar-exposure FTE convention, not observed hours worked or a legal full-time definition. Consecutive segments for one employee are supported; overlapping segments are rejected.
Are these inputs private?

These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.

Further reading

ILO: full-time-equivalent measurement background; the reference schedule here is supplied ↗

Background reading; this does not imply endorsement or independent review of SumFizz.

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