Cleaning Hours Estimator
How many cleaning hours, and how many cleaners, does your school need? Get an instant estimate from three answers, then refine it for your site.
Your school
Three quick answers give you an estimate. You can refine it afterwards.
How this estimate is calculated
This estimate is calculated from the school type, floor area (GIA) and cleaning days you enter, using ICS Cleaning productivity assumptions.
- Each of the five education building types (pre-school/nursery, primary, secondary, special school, college/university) has its own ICS productivity assumption: how much floor area a cleaner typically covers in an hour on a modern, straightforward site.
- That base figure is adjusted for the answers you give about layout, building age, floor types, location and cleaning standard. The effective rate shown in your results is the rate after those adjustments.
- Recommended, alternative and operationally resilient staffing options are generated from the resulting hours using a rule-based staffing model.
- The cleaning model score compares your current hours and arrangements with what a site like yours needs. Cleaning entirely outside school hours scores fully where daytime cover isn't needed.
- All outputs are indicative planning figures, not a guaranteed staffing outcome or a quotation.
Want to understand the assumption behind the calculation? Read our IntelliClean knowledge guide to interpreting cleaning productivity rates.
How are cleaning hours calculated?
Cleaning hours are estimated by combining your school's cleanable floor area with a productivity assumption for its building type, then adjusting for factors that make a site quicker or slower to clean.
Beyond floor area, the estimate accounts for building layout, age, floor types, site access and the required cleaning standard. These factors are combined with a productivity rate to produce an indicative weekly cleaning-hours figure, without treating the calculation as a black box.
What is a cleaning productivity rate?
A productivity rate is expressed in square metres per labour hour (m²/hour) — it describes how much floor area one cleaner can reasonably clean to a given standard in an hour.
A single productivity figure should not be applied to every school. Denser furniture, more washrooms, higher occupancy, older or more complex layouts, and enhanced cleaning standards all reduce the area a cleaner can cover per hour. This estimator applies a base productivity rate for your school type — an ICS operational assumption informed by industry cleaning-productivity practice, not a single external benchmark — then adjusts it using the complexity factors you provide.
What affects cleaning hours?
Eight recurring site characteristics typically explain most of the difference between two schools of similar size.
Building layout
Corridors, split levels and multiple blocks add time.
Occupancy
More pupils and staff using a space generally means more cleaning.
Washroom provision
Washrooms are labour-intensive relative to their floor area.
Floor types
Carpeted areas typically take longer than hard flooring.
Cleaning frequency
Daily, alternate-day or reduced schedules change total hours.
Furniture density
Densely furnished classrooms slow down cleaning tasks.
High-traffic areas
Entrances and circulation routes need more frequent attention.
Service standards
An enhanced specification requires more time than a standard one.
How this estimate works
The calculation follows a consistent, explainable flow — the same building information moves through each stage below before arriving at a weekly-hours figure and a staffing structure.
Building area
Your gross internal floor area (m²)
Base productivity
m²/hour rate for your school type
Cleaning frequency
Days per week the site is cleaned
Complexity factors
Layout, age, floor types, access, standard
Weekly hours
Your indicative weekly cleaning-hours figure
Staffing structure
Recommended, alternative and resilient options
How should I use the result?
Use the result as an indicative planning figure to sense-check your cleaning hours — not as a replacement for a measured, site-specific assessment.
The result is suitable for:
- Initial planning
- Budget discussions
- Staffing reviews
- Comparing an existing cleaning allocation
- Preparing for a specification review
It is not:
- A binding quotation
- A guaranteed staffing requirement
- A replacement for a site survey where detailed pricing is required
About ICS Cleaning
ICS Cleaning Services has delivered school and education cleaning across Yorkshire and Lincolnshire for over 30 years, with ISO 9001 and ISO 14001 accreditation and directly employed operational teams — the operational basis for the productivity assumptions used in this estimator.
Related guidance
Background reading on how school cleaning hours and schedules are built.
Continue your cleaning review
Once you have an hours estimate, these tools help with the next step.
Define the areas, tasks and frequencies behind your hours before you compare or tender.
Score your current school cleaning service and see where it may be falling short.
Check whether the specification behind your cleaning hours is clear and measurable.
Sense-check whether a tender price reflects the hours and staffing it should cover.
A separate scored review for office and commercial cleaning contracts.
Frequently asked questions
Want an accurate cleaning requirement for your building?
Use the estimator as a starting point, or ask ICS to review your building, specification and current cleaning allocation.