Free Porta Potty Cost Calculator

How This Calculator Works

This calculator uses industry-standard guidelines based on OSHA regulations for construction sites (29 CFR 1926.51) and Portable Sanitation Association International (PSAI) event guidelines.

For Events

• Baseline: 2 units per 100 guests for events under 4 hours
• Duration adjustment: Add 1 unit per 100 guests for events over 4 hours
• Alcohol adjustment: Add 30% more units when alcohol is served (usage increases significantly)
• Extended events: Events over 8 hours need additional units for servicing downtime

For Construction Sites

• OSHA minimum: 1 unit per 10 workers (29 CFR 1926.51)
• Long-duration adjustment: Projects over 4 weeks add 20% for service buffer
• Note: OSHA requires handwashing stations in addition to toilets — these are usually available as add-ons

Pricing Estimates

Costs shown are national averages. Actual local pricing varies by market, delivery distance, rental duration, service frequency, and unit type. Premium markets (Northeast, West Coast major metros) typically run 10-20% higher than the midrange. Enter your ZIP code to get local pricing and connect with a nearby provider.