How do I calculate cleaning staff numbers?

Divide the total floor area by the productivity rate (m² per hour per cleaner) to get total cleaning hours needed. Then divide by the available time window. For example, 1,000 m² at 180 m²/hr = 5.6 hours of cleaning. If you have a 3-hour window, you need 2 cleaners.

What is a typical productivity rate?

A standard office cleaner covers about 180 m² per hour on average. This includes all typical tasks. Open warehouse-style spaces can be 250+ m²/hr, while detailed environments like hospitals may be 100-120 m²/hr.

Should I add extra staff for cover?

Yes. It is good practice to plan for 10-15% additional capacity to cover sickness, holidays and unexpected absences. For critical sites, having a trained relief pool is essential.

CleanCalcs

Staff Required Calculator

Work out how many cleaning staff are needed for a building based on area and frequency.

Total Floor Area

Time Window Available

Hours available for cleaning

Complexity

How We Calculate This

Total hours = area ÷ productivity rate

Staff needed = total hours ÷ available time window

Productivity rates

Low complexity: 250 m²/hr
Medium: 180 m²/hr
High: 120 m²/hr

Frequently Asked Questions

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Last updated: February 2026

All calculations are estimates. Always verify quantities and timings for your specific situation.