THE NUMBERS, EXPLAINED
How to use this calculator.
Measured productivity is per worker and includes the stated site cleaning scope. Travel and non-area tasks require separate allowance.
Start with your inputs
Enter cleanable areas by site (m²), services per week by site, measured cleaning rates by site (m²/worker-hour). Keep amounts in the units shown on each field. The example is a starting point, not a recommended value.
| Input | Example value |
|---|---|
| Cleanable areas by site (m²) | 1000,600 |
| Services per week by site | 5,3 |
| Measured cleaning rates by site (m²/worker-hour) | 250,200 |
A worked example
With the example inputs above, weekly worker-hours by site is 20, 9. Change the inputs to explore your own scenario.
| Result | Example answer |
|---|---|
| Weekly worker-hours by site | 20, 9 |
| Total weekly worker-hours | 29 |
| Weekly area serviced (m²) | 6,800 |
How this is calculated
Weekly worker-hours by site
Multiply area by visits and divide by measured productivity.
Total weekly worker-hours
Add all site workloads.
Weekly area serviced (m²)
Sum area across the agreed visit frequencies.
Symbols and units
- a
- Cleanable areas by site (m²)
- b
- Services per week by site
- c
- Measured cleaning rates by site (m²/worker-hour)
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions and limits
Measured productivity is per worker and includes the stated site cleaning scope. Travel and non-area tasks require separate allowance.
Calculations use the values you enter. Blank or invalid inputs show an error instead of silently substituting zero. Results are displayed to useful precision; calculations retain the underlying numeric precision.
Questions about this tool
What does the result tell me?
Weekly worker-hours by site; Total weekly worker-hours; Weekly area serviced (m²). The result applies to the method and inputs described above. Check the units and assumptions before using it in a decision.
Why might another calculator differ?
Differences in units, rounding, timing or model definitions can produce different answers. Compare the input definitions and the method, rather than only the final number. For this tool: Measured productivity is per worker and includes the stated site cleaning scope. Travel and non-area tasks require separate allowance.
Are my inputs stored or sent to AI?
Calculations on this page happen in your browser. The separate AI question finder sends its submitted conversation to OpenAI; these calculator fields are not sent. Favourites and recent tool names are stored locally. A shared link contains the inputs you choose to include.
Further reading
OpenStax: Describe and Identify Cost Drivers ↗
Background reading; this does not imply endorsement or independent review of SumFizz.
Review status
Software example and browser checks are recorded in our quality report. No external expert review is claimed. Created with coding assistance; calculations run as ordinary browser code.
Read the quality report →