How long does it take to clean a school?

A typical 12-classroom primary school needs about 5-6 hours of cleaning per evening. This covers classrooms, halls, corridors, toilet blocks and staff areas. Secondary schools with specialist rooms and larger halls take proportionally longer.

How many cleaners does a school need?

Most primary schools need 2-3 evening cleaners working 3-hour shifts. Secondary schools typically need 4-8 cleaners depending on size. Many schools also employ a daytime caretaker/cleaner for toilet checks and spillage during the school day.

What cleaning products are safe for schools?

Schools should use COSHH-compliant, low-toxicity products. Antibacterial surface cleaners, toilet sanitisers and floor cleaners should carry EN standards certification. Many schools now use colour-coded microfibre systems to reduce chemical use.

How much does school cleaning cost in the UK?

Commercial school cleaning contracts typically cost between £8-15 per hour per cleaner. A small primary school might cost £300-500 per week. Deep cleans during holidays are additional. Rates vary by region, with London and the South East being highest.

CleanCalcs

School Cleaning Calculator

Calculate staffing and supplies for school cleaning based on classroom and facility count.

Classrooms

Total number of classrooms

Halls / Gyms

Assembly halls, sports halls, dining halls

Toilet Blocks

Separate toilet/washroom areas

School TypeAffects cleaning time multiplier

Cleaning FrequencyDaily term-time or weekly deep clean

How We Calculate This

The calculator estimates total cleaning time from the number of classrooms, halls and toilet blocks, adjusted for school type and cleaning frequency.

Base rates

Classroom: 25 mins
Hall/gym: 45 mins
Toilet block: 20 mins

Adjustments

Secondary schools: +15%. Nurseries: +25% (higher hygiene standards). Weekly deep clean: 1.8x daily rate.

Frequently Asked Questions

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Last updated: March 2026

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