APPA Custodial Staffing Calculator
How many custodians do your facilities need at APPA Level 1, 2, 3 or 4? Enter your total square footage, or break it down by space type for a more precise staffing model.
Custodial staffing is calculated space type by space type: divide the cleanable square feet of each space type by APPA's square feet per custodian for the target cleaning level, then add the results. At APPA Level 2, one custodian covers roughly 21,300 square feet of classrooms, 16,900 of offices, 3,300 of restrooms and 115,900 of corridors.
Assumes a typical campus mix: 40% classrooms, 30% offices, 5% restrooms and 25% corridors. Use cleanable square feet, not gross building area.
Set this for a more accurate estimate: carpet and hard floor take different amounts of labor.
One row per type of space, already split from your total. Change the square feet and levels to match your facilities, or add space types. Use total square footage instead
An estimate from APPA's production rates for a single shift, for hard floor and carpet. It counts custodians only: supervision, relief for vacation and sick time, supplies, equipment and periodic work such as floor refinishing are not included. A real program starts with a space-by-space work-loading analysis.
Restrooms: APPA publishes no restroom rate below Level 2, so CSS costs restrooms at the Level 2 rate (3,303 cleanable sq ft per custodian) at Level 2 and every lower level. This is CSS’s assumption, not APPA’s.
Square feet per custodian, by APPA level
Hard floor
| Space type | Level 1 | Level 2 | Level 3 | Level 4 |
|---|---|---|---|---|
| Restroom | 2,579 | 3,303 | — | — |
| Research lab | 6,247 | 8,521 | 10,184 | 14,594 |
| Office | 9,411 | 16,930 | 30,959 | 41,775 |
| Classroom | 10,279 | 21,306 | 38,513 | 50,341 |
| Corridors and public circulation | 72,036 | 115,889 | 132,461 | 172,481 |
Carpet (soft floor)
| Space type | Level 1 | Level 2 | Level 3 | Level 4 |
|---|---|---|---|---|
| Restroom | 2,579 | 3,303 | — | — |
| Research lab | 6,247 | 8,521 | 10,184 | 14,594 |
| Office | 6,376 | 12,468 | 24,225 | 31,969 |
| Classroom | 13,579 | 22,474 | 38,957 | 49,906 |
| Corridors and public circulation | 23,340 | 55,342 | 74,952 | 117,667 |
Cleanable square feet per custodian FTE. Source: APPA, Operational Guidelines for Educational Facilities: Custodial (4th ed., 2023), Appendix B, p. 300 “Summary of Hard Surface Cleaning” and p. 301 “Summary of Soft Surface Cleaning”. The hard-floor table also appears in APPA's Cleaning Operations chapter (August 2024). A dash means APPA publishes no value. Restrooms: APPA publishes no restroom rate below Level 2, so CSS costs restrooms at the Level 2 rate (3,303 cleanable sq ft per custodian) at Level 2 and every lower level. This is CSS’s assumption, not APPA’s.
How to Use the Result
The calculator turns APPA's staffing tables into a first estimate. The levels and the tables are explained in APPA Cleaning Standards: The 5 Levels Explained. Two campuses with the same square footage can need very different staffing, because restrooms, labs and classrooms take far more labor per square foot than corridors, which is why the calculator works space type by space type.
The next step is a full work-loading analysis: every space inventoried, a target level set for each, and schedules built from the result. That's how CSS starts every program, and how you can tell whether a bid's staffing is real. The Living Facility goes one step further, letting real occupancy data set the level each night.
Frequently Asked Questions
How many square feet can one custodian clean?
It depends on the APPA level and the type of space. At Level 2, APPA's tables put one custodian at roughly 21,300 square feet of classrooms, 16,900 of offices, 3,300 of restrooms and 115,900 of corridors.
How do you calculate custodial staffing?
For each type of space, divide its cleanable square feet by APPA's square feet per custodian at the target level, then add the results to get full-time equivalents (FTE).
Which APPA level should we use?
Most campuses use Level 2 for general space and Level 1 for showcase areas such as admissions lobbies and executive suites. Level 3 suits low-traffic support space.
Does the calculator include supervision and benefits?
No. It counts custodians only. A CSS quote estimate adds on-site management and supervision, benefits and other burdens, and equipment: use the “Turn your staffing model into a quote estimate” button under your result.
What if I only know my total square footage?
Enter the total and the calculator assumes a typical campus mix of 40% classrooms, 30% offices, 5% restrooms and 25% corridors. If you know your mix, break it down by space type for a more precise staffing model.
Keep Reading
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CSS builds APPA-based custodial programs from a space-by-space work-loading analysis.
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