Enter workers, facilities, and conditions to estimate minimum compliant restroom capacity today. See gaps, recommendations, and exportable evidence for site safety files quickly always.
Use peak on-site workers for the busiest shift. This gives a conservative minimum for facilities and helps reduce queues and downtime.
| Peak Workers | Toilets Available | Urinals Available | Handwash Stations | Potable Water | Standard |
|---|---|---|---|---|---|
| 38 | 1 | 1 | 1 | Yes | OSHA Construction Table D-1 |
| 120 | 3 | 3 | 2 | Yes | OSHA Construction Table D-1 |
| 85 | 9 | 4 | 3 | Yes | Enhanced Planning Ratio |
These rows demonstrate typical inputs for quick testing.
OSHA Construction Table D-1 uses peak on-site workers (W):
Enhanced Planning Ratio is comfort-focused:
Sanitation facilities support health, morale, and schedule control. Undersupply creates queues, longer walks, and reduced use. This calculator turns staffing and site conditions into clear requirements, gaps, and actions you can communicate during daily planning and safety coordination. It also supports consistent decisions when crews scale up or down across phases, and when multiple subcontractors share the same area.
Demand follows the busiest period, not the average. Enter the maximum number of workers present during the most crowded shift or activity. Peak planning prevents short-term overload during pours, lifts, or major deliveries and helps keep breaks on time.
The compliance mode uses stepwise ratios based on peak workers (W). If W ≤ 20, the minimum is one toilet seat. For 21–199 workers, required toilets and urinals are ceil(W/40). For W ≥ 200, required toilets and urinals are ceil(W/50). Ceiling rounding ensures whole units.
Some projects need additional capacity beyond minimum targets. The enhanced option uses toilets = ceil(W/10) and urinals = ceil(W/20). It is useful when travel is long, PPE is heavy, or owners expect shorter lines and cleaner conditions.
Capacity is only one part of sanitation control. The calculator checks handwashing stations, potable water, soap, towels, and cleaning frequency. Daily cleaning is treated as a baseline; twice daily or after breaks improves resilience during heat, mud, and high traffic. Missing hygiene items triggers review actions.
Even when counts pass, distant facilities can reduce actual use. The distance field is a planning cue for relocating units closer to work fronts and break areas. Shorter access typically improves hygiene behavior and reduces productivity loss from extended walks.
The score summarizes overall readiness on a 0–100 scale. Toilet seats carry the greatest weight, urinals add capacity, and handwashing plus potable water strongly influence hygiene performance. Use the gap values to size additional units and track improvement after changes.
Export results as CSV or PDF and attach them to site safety files, subcontractor onboarding, and weekly audits. Regenerate the report when staffing peaks change, phases shift, facilities move, or servicing plans change. Consistent updates create a defensible compliance record.
Use peak workers for the busiest shift. Peak planning prevents temporary crowding, long queues, and reduced hygiene. Average values often understate demand during pours, lifts, or major deliveries.
Urinals are supplemental and do not replace toilet seats for mixed workforces. Keep enough toilet seats to meet the target, then treat urinals as an additional capacity improvement.
It ensures the plan includes at least one toilet when workers are present. This helps avoid a zero‑facility plan during short-duration or remote activities.
The calculator uses ceiling rounding, so any fraction becomes the next whole unit. For example, 41 workers at a 1-per-40 rule requires two units.
Capacity can pass while hygiene controls need improvement. Missing soap, towels, potable water, insufficient handwashing stations, or weak cleaning frequency can trigger review recommendations.
No. It is a comfort-focused planning ratio to reduce waiting, support hygiene, and meet strict owner expectations. Use it when schedules are tight or site travel is long.
Regenerate whenever peak staffing changes, a new phase starts, facilities move, or servicing frequency changes. Frequent updates keep documentation aligned with current site conditions.
Plan facilities early to keep crews healthy and productive.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.