How many toilets does your event need?
The ratio every event plan is judged on, answered in ten seconds. Slide your guest count, tell us about the bar, done.
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For 150 guests with a bar you need 3 standard toilets plus 1 accessible unit. The underlying UK planning ratio is 1 unit per 75 guests without alcohol, tightening to 1 per 50 guests where alcohol is served, with a minimum of two units. Add one accessible unit per ten standard units (minimum one). Multi-day events need a daily servicing plan on top. A standard unit typically costs £60 to £110 for the weekend, rising to £600 to £1,200 for a luxury toilet trailer.
The ready reckoner
| Guests | No alcohol | With alcohol | Accessible |
|---|---|---|---|
| 50 | 2 | 2 | 1 |
| 100 | 2 | 2 | 1 |
| 150 | 2 | 3 | 1 |
| 200 | 3 | 4 | 1 |
| 300 | 4 | 6 | 1 |
| 500 | 7 | 10 | 1 |
| 1000 | 14 | 20 | 2 |
Why the bar changes the maths
Alcohol roughly doubles visit frequency, and it concentrates visits into surges: the toast, the band break, last orders. That is why the ratio tightens from 1-per-75 to 1-per-50 the moment a bar opens, and why urinal banks earn their place at beer-led events.
These are the same ratios our portable toilet hire guide covers in full, including luxury trailer sizing and servicing schedules for multi-day events. Curious how the units themselves work with no water or power on site? See how a portaloo actually works. Toilets are just one line of a bigger list: see where they fit in the full marquee wedding kit list.
Toilet numbers: quick answers
How many toilets do I need for 100 guests?
With alcohol served: 2 standard units plus 1 accessible. Without alcohol: 2 plus accessible. The ratio is 1 per 50 guests with alcohol, 1 per 75 without, always with a minimum of two standard units so there is never a single queue.
How many toilets for 200 wedding guests?
A 200-guest wedding with a bar needs 4 standard units plus 1 accessible, or a luxury 3+1 trailer plus one standard backup. All-day events should add a service visit or extra capacity.
Are these ratios a legal requirement?
They are the industry planning ratios that licensing teams and event management plans expect to see, drawn from established event guidance. For licensed events your local authority may specify numbers as a condition, and they will look very like these.
Do I need an accessible toilet at a small event?
Yes: plan at least one accessible unit at any public event, on firm level ground with a clear approach. For private parties it remains the decent default, and it doubles as the parent-and-baby option.
What about urinals?
At beer-led events, a 4-bay urinal unit relieves pressure on cubicles dramatically: one 4-bay counts roughly as two standard units for male guests. Festivals typically split provision 60/40 between cubicles and urinals.
How many portable toilets does a 1,000-person festival need?
With a bar running, plan for 20 standard units plus 2 accessible, using the 1-per-50 ratio. Multi-day camping events add showers separately (roughly 1 per 250 campers) and need a daily servicing visit to keep units usable for the whole run.
How many toilets do I need for 150 guests?
With a bar: 3 standard units plus 1 accessible, using the 1-per-50 ratio. Without alcohol: 2 standard units plus 1 accessible. This is the reference size our calculator opens on, because it is the most common wedding and party guest count we see.
How many toilets do I need for 300 guests?
With a bar: 6 standard units plus 1 accessible, using the 1-per-50 ratio. Without alcohol: 4 standard units plus 1 accessible. At this size, some suppliers offer a bank of luxury trailers instead of standalone units: ask for a like-for-like price comparison.
How many toilets do I need for 500 guests?
With a bar: 10 standard units plus 1 accessible, using the 1-per-50 ratio. Without alcohol: 7 standard units plus 1 accessible. At 500 guests, split provision across two locations if the site is spread out, rather than one long queue at a single bank.
How much does portable toilet hire cost for an event?
A standard single unit typically costs £60 to £110 for the weekend, with an accessible unit at £90 to £150. A luxury 2+1 toilet trailer runs £600 to £1,200, and a 3+1 trailer £900 to £1,600. A single-day hire is usually priced the same as a weekend, since delivery and collection are the main cost, not how long the unit sits on site. Our portable toilet hire guide has the full price list, luxury trailer sizing and servicing schedules.