How Many Portaloos Do I Need for My Event?

You're planning an event and you know you need portaloos. But how many? Order too few and you'll have queues, complaints, and overflowing units. Order too many and you've wasted money. Getting the number right matters more than most organisers realise.

This guide gives you a straightforward formula to calculate exactly how many portable toilets you need, with adjustments for alcohol, duration, event type, and gender split. No guesswork required.

The Basic Rule: 1 Portaloo Per 50 Guests

The industry standard starting point is simple: 1 portable toilet per 50 guests for a 4-hour event. This assumes a daytime event with no alcohol service. It's the baseline — the absolute minimum you should provide.

This ratio comes from the portable sanitation industry's operating experience across millions of events worldwide. At this ratio, the average wait time stays under 3 minutes and units don't reach capacity within the event timeframe.

But here's the thing — very few events are a daytime, alcohol-free, 4-hour event with a 50/50 gender split. So you'll almost always need to adjust upward from this baseline.

The Alcohol Factor: Add 20%

Alcohol increases bathroom frequency significantly — there's no polite way around it. If your event is serving beer, wine, or spirits, increase your portaloo count by at least 20%.

For a 200-person event with alcohol, you'd go from 4 units (the base calculation) to 5 units. For a 100-person wedding with a full bar running for 6+ hours, you'd want 3 units rather than the base calculation of 2. The 20% uplift accounts for the increased usage frequency and slightly longer average visits that come with alcohol consumption.

For heavy-drinking events like music festivals, buck's parties, or all-day sporting events, consider going even higher — 30-40% above baseline. We'd rather you have one unit too many than one too few.

Quick Reference: How Many Portaloos by Guest Count

Here's a quick reference table for a standard 4-6 hour event:

20 guests: 1 unit (no alcohol) / 1 unit (with alcohol)

50 guests: 1 unit (no alcohol) / 2 units (with alcohol)

100 guests: 2 units (no alcohol) / 3 units (with alcohol)

200 guests: 4 units (no alcohol) / 5 units (with alcohol)

500 guests: 10 units (no alcohol) / 12-13 units (with alcohol)

For events longer than 6 hours, add an extra unit per 50-75 guests. For multi-day festivals, you'll also need servicing between days — we can schedule this as part of your hire.

Other Factors That Affect Your Count

Event Duration

A 2-hour morning tea is completely different from an all-day festival. The base formula assumes 4-6 hours. For events under 4 hours, the base count is usually fine. For events running 6-8 hours, add 25% more units. For anything over 8 hours or multi-day events, add 50% and factor in mid-event servicing to empty tanks and restock supplies.

Food and Beverages

Events with full catering (sit-down meals, buffets) generate more bathroom visits than cocktail-style or no-food events. If you're serving a substantial meal, plan for roughly 10-15% more units than the base formula suggests.

Gender Split

Women use portable toilets more frequently and for slightly longer than men on average. If your event skews heavily female (baby showers, hen's parties, women's sporting events), add an extra 10-15% to your count. For predominantly male events, the base count is usually sufficient.

Existing Facilities

If your venue has existing toilets (a pub, club, community hall), you can reduce your portaloo count accordingly. The portable toilets supplement the existing facilities rather than replacing them. A venue with 4 existing cubicles serving 200 guests might only need 2-3 additional portaloos rather than the full 4-5 the formula suggests.

Event-Specific Recommendations

Weddings

Weddings are our most common event hire. A typical Brisbane wedding with 80-120 guests, a full bar, and a 6-8 hour reception needs 3-4 portaloos. We recommend event-grade units for weddings — they're the same portable toilet but thoroughly cleaned, freshly stocked, and presented to a higher standard. For premium weddings, consider adding a dedicated hand wash station for that extra touch.

Corporate Events

Corporate events tend to be shorter (2-4 hours) with moderate alcohol. For a 100-person corporate function, 2 units is usually plenty. For larger corporate events of 200+, scale using the formula. Corporate clients typically value cleanliness and presentation, so event-grade units are recommended.

Music Festivals and Outdoor Concerts

Festivals are the highest-demand scenario. Long duration, heavy alcohol consumption, and peak usage spikes (between sets, during breaks) mean you need more capacity than a standard event. For a 500-person festival running 8+ hours with alcohol, plan for 15-18 units with at least one mid-event service. Festival portaloos take a beating, so standard construction-grade units are the practical choice.

Sporting Events

Community sporting events (fun runs, junior sport carnivals, charity walks) are typically shorter and lower-intensity. A 200-person sporting event running 3-4 hours usually needs 3-4 units. If there's a licensed bar at the finish line, adjust upward.

Pricing: What Will It Cost?

Our event portaloo hire starts from $7.50 per day (ex GST) per unit. For events requiring 3 or more units, we automatically apply a 20% multi-unit discount — the more you hire, the more you save.

Delivery and collection are priced based on distance from our Capalaba depot. For most Brisbane metro locations, delivery is very affordable. The total cost for a typical 100-person wedding with 3 portaloos over a weekend is far less than most people expect — portaloo hire is one of the cheapest line items on any event budget.

Get a Quote for Your Event

Still not sure how many you need? Use our online order form to get an instant quote, or call us on (07) 3367 2237. Tell us your guest count, event type, and duration, and we'll recommend the right number of units. We've serviced thousands of Brisbane events — we know what works.