How many portable toilets do I need for my event?

As a rough guide: 1 standard unit per 50 guests for events up to 4 hours. For longer events or those serving alcohol, increase by 30%. Always include at least 1 accessible unit and adequate hand washing facilities.

Does serving alcohol affect toilet numbers?

Yes, significantly. Alcohol increases toilet usage by approximately 30%. Events with free-flowing drinks or an open bar should increase capacity accordingly. Peak usage often coincides with periods shortly after drinks service.

Do I need accessible toilets?

Yes. The Equality Act requires adequate accessible facilities at events open to the public. We recommend at least 1 accessible unit per event, plus 1 additional per 100 guests. These are also useful for guests with pushchairs or young children.

How often do portable toilets need servicing?

For events up to 4 hours, pre-event stocking is usually sufficient. For 4-8 hour events, one mid-event service is recommended. Full-day or multi-day events need servicing every 6 hours. More frequent servicing is needed when alcohol is served.

Should I provide luxury toilets instead of standard?

Luxury trailer units offer a better experience with flushing toilets, hand basins, and lighting. They are popular for weddings, corporate events, and premium parties. Consider replacing every third standard unit with a luxury unit if budget allows.

PartyCalcs

Toilet Hire Calculator — Portable Toilet Requirements

Calculate how many portable toilets, accessible units, and hand wash stations you need for your event.

Total Guests

Total number of people attending

Event Duration

Total duration of the event or activity

Female Split

% of guests who are female

Alcohol served

How We Calculate This

The calculator estimates toilet requirements based on:

Usage rate: ~1.5 visits per person per 4 hours
Alcohol factor: +30% usage when alcohol is served
Gender split: Female guests need ~50% more capacity (longer usage time)
Peak factor: Accounts for peak usage periods
Each unit: Handles ~100 visits before needing service

Frequently Asked Questions

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Last updated: March 2026

All calculations are estimates. Adjust quantities based on your guests and event type.