Floor scrubber productivity calculator
Calculate how many square feet per hour a floor scrubber really cleans, and how long your floor will take, using path width, speed and efficiency.
How the calculation works
Spec sheets quote theoretical productivity: path width multiplied by top speed, as if the machine never turned, overlapped a pass or stopped to empty its tank. Real floors are not like that. This calculator applies an efficiency factor to give a practical number you can plan labor around.
sq ft per hour = path width (in) ÷ 12 × speed (ft/min) × 60 × efficiency
A 20 inch walk-behind at 175 feet per minute has a theoretical rate of about 17,500 sq ft per hour. At 65 percent efficiency it delivers about 11,400 sq ft per hour, which is the figure to schedule against.
Choosing an efficiency factor
| Environment | Efficiency | Why |
|---|---|---|
| Offices, classrooms, restrooms | 50 to 60% | Short runs, furniture, frequent turns, doorways |
| Retail, corridors, hospitals | 60 to 70% | Long corridors broken by fixtures and traffic |
| Warehouses, gyms, open floors | 70 to 80% | Long straight passes, fewer obstacles |
Tank capacity matters too. If a machine needs a dump and refill every 25 minutes, and each takes 8 minutes, efficiency drops by roughly a quarter on its own. See our productivity benchmarks for the full model and sensitivity tables.
What to do with the result
- Compare the hours needed with the time window you actually have, then use the size recommender if it does not fit.
- Turn hours into money with the ROI calculator.
- Check that your batteries last that long with the runtime calculator.
Frequently asked questions
How many square feet per hour does a floor scrubber clean?
In practice a 20 inch walk-behind cleans about 10,000 to 12,000 sq ft per hour, a 28 inch walk-behind about 15,000 to 16,000, and a 32 inch rider around 30,000. Spec-sheet figures are higher because they assume no turns or stops.
Why is my real productivity lower than the spec sheet?
Spec sheets multiply path width by maximum speed with no allowance for turning, overlap between passes, slowing near obstacles, or emptying and refilling tanks. Those losses typically remove 25 to 45 percent.
What speed should I enter for a walk-behind?
A comfortable walking pace with a scrubber is about 150 to 200 feet per minute, roughly 2 miles per hour. Slower operators or heavy soil may need 100 to 130.
Should overlap be included?
Yes. Operators overlap passes by 2 to 4 inches to avoid missed strips, which is already part of the efficiency factor. If you overlap heavily, lower the efficiency.