House Cleaning Frequency Calculator
Find out how often you should clean different areas of your home based on your household profile.
Formula
Dirt Load Score (DLS):
DLS = [ (People × 1.0) + (Pets × 1.5) + Allergy Bonus + Children Bonus ] × Lifestyle Multiplier × (Home Size ÷ 1200)
- Allergy Bonus: +1.5 (1 sufferer), +3.0 (2+ sufferers)
- Children Bonus: +2.0 if children under 12 present
- Lifestyle Multiplier: 0.75 (low), 1.0 (medium), 1.35 (high)
- Size Factor: normalised to a 1,200 sq ft baseline
Adjusted Cleaning Interval (days):
Interval = Base Days ÷ (1 + k × DLS)
Where k is a task-specific sensitivity constant (0.02–0.10) reflecting how quickly that task's urgency grows with dirt load. A higher DLS compresses the interval, meaning more frequent cleaning is recommended.
Assumptions & References
- Base cleaning intervals are derived from guidelines published by the American Cleaning Institute (ACI) and Good Housekeeping Institute.
- Pet dander and hair are weighted at 1.5× per pet, consistent with AAFA (Asthma and Allergy Foundation of America) recommendations for allergen reduction.
- Allergy/asthma sufferers require more frequent dusting and vacuuming to keep airborne particulates below trigger thresholds (AAFA, 2023).
- The 1,200 sq ft baseline represents the U.S. median apartment/small home size (U.S. Census Bureau Housing Survey).
- Lifestyle multiplier reflects time-at-home foot traffic; remote workers generate ~35% more indoor dirt accumulation (ISSA Cleaning Industry Research).
- Children under 12 are associated with significantly higher surface contamination and floor soiling (NSF International Household Germ Study).
- Weekly time estimates assume ~30 minutes per cleaning task occurrence; actual time varies with home layout and cleaning method.
- This calculator provides general guidance only. Individual health conditions or specific flooring/surface types may require adjusted schedules.