Night Cleaning Schedule Calculator

This calculator breaks a night-shift building down into discrete task categories and estimates hours for each using production-rate benchmarks from the ISSA Cleaning Times, the published industry-standard workloading guide from ISSA, The Worldwide Cleaning Industry Association — trash removal at 5,000 sq ft/hr, carpet vacuuming at 2,500 sq ft/hr, hard-floor dust mopping at 7,000 sq ft/hr, restrooms at 20 minutes flat and break rooms at 18 minutes flat regardless of size, desk/surface wiping at 15,000 sq ft/hr, and a flat half-hour for lobby/entrance detail work. Summing these gives total task hours, which the calculator then compares against available labor (staff count times shift length) to compute utilization. The recommended staff figure is the calculation's most important output: it divides total task hours by shift hours multiplied by a built-in 85% productivity factor, which accounts for time lost to breaks, walking between zones, and equipment setup/teardown that isn't captured in the raw task-time formulas — this 85% figure is fixed in the engine, not adjustable.

Surplus/deficit hours then tells you, at your actual current staffing, whether you have slack or are running short once that same 85% realism factor is applied. The model treats carpet and hard-floor square footage as splitting the building's total area by the carpet-coverage percentage, and it assumes uniform task difficulty across zones — it won't capture a lobby with unusually high foot traffic or a server room needing extra care. Because restroom and break-room times are flat per-unit rather than scaled by fixture count or size, very large or very small facilities of either type may see actual times diverge meaningfully from the estimate.