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Enter the maximum concurrent crowd inside the same event footprint.
people
Include public open hours plus realistic arrival and departure time.
hours
Choose the closest crowd and break pattern.
Choose Yes when beer, wine, spirits, or a paid bar is available.
Prepared meals, vendors, or concessions need stronger sanitation coverage than sealed snacks.
Enter existing toilet fixtures that offset portable demand.
fixtures
Local permits, venue policies, or guest needs can require more than this planning floor.
Use 1 for one bank; public planning distributes accessible coverage when possible.
clusters
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Keep Normal unless the event is hot, humid, or exposed with limited shade.
{{ comfort_buffer_percent }}%
Use 0% for the strict model baseline or add a documented planning cushion.
These offset the gross handwash-station recommendation.
stations
Use 0 to disable or enter 3–24 hours from the vendor's service plan.
hours
Use $, EUR, GBP, RM, or another short quote label.
Rental rate per standard portable toilet for the event period.
per unit
Rental rate per accessible portable toilet.
per unit
Use 0 when stations are bundled into the toilet quote.
per station
Rate per portable toilet per mid-event service visit.
per unit-visit
Use the quoted flat delivery or minimum charge when known.
flat
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Line itemQuantityUnit rateSubtotalCopy
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Chart unavailable. Use the fixture plan or download CSV.

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Portable-restroom planning starts with the largest crowd sharing the event site, not necessarily total ticket sales. A festival with timed entry may serve many people over a day but have a smaller peak crowd, while a concert can bring nearly everyone onto the grounds at once. Duration then changes how often those guests are likely to need the facilities.

Unit count is only one part of a workable sanitation plan. Alcohol and prepared food can raise demand, hot weather can increase drinking and restroom visits, and several widely separated activity areas may need separate restroom banks. Existing permanent fixtures help only when guests can reach and use them throughout the event.

  • Capacity covers the expected uses without relying on an unrealistic cleaning or pumping schedule.
  • Accessibility includes the number and distribution of accessible units, a level location, an accessible route, usable door clearance, and maneuvering space.
  • Hygiene considers handwashing, food service, restocking, lighting, waste handling, and service visits during long events.
  • Placement balances short walking distances with delivery access, terrain, queues, privacy, and separation from food preparation.

A low rental count can still fail if all units are placed in one corner, an accessible unit sits on soft or sloped ground, or service vehicles cannot reach the site. Local permits, venue rules, rental-company capacity, and guest needs may require more than a planning estimate.

Budgeting should follow the operational plan. Standard units, accessible units, handwash stations, service visits, and delivery fees are priced differently, so a single per-unit average can hide the part of a quote that changed. Keep the assumptions alongside the estimate when requesting vendor bids.

How to Use This Tool:

Use the peak concurrent crowd and full public operating window, then add only the site factors that genuinely apply.

  1. Enter Expected attendees as the maximum crowd inside the shared event footprint and include realistic arrival and departure time in Event duration.
  2. Choose the closest event, alcohol, food, and weather profiles. Add a documented Comfort buffer from 0% to 40% when the baseline would leave too little queue or uncertainty allowance.
  3. Credit only dependable Permanent restroom fixtures, then choose the accessibility basis and number of restroom clusters. Public-event planning keeps accessible units inside the rental total.
  4. Enter existing handwash stations and a service interval. Use zero for no mid-event visit, or choose 3 to 24 hours when pumping, cleaning, or restocking is planned.
  5. Add current vendor rates to build the rental budget, then review Fixture plan and Service checks with the venue, rental provider, and permitting authority.

Interpreting Results:

Portable units is the rental count after permanent-restroom credit. Accessible units are included in that total, so they should not be added again. Handwash stations and service unit-visits are separate quantities.

  • Covered appears when permanent fixtures remove the portable rental need.
  • Comfortable is at most 85 attendees per portable unit, Watch is above 85 and at most 115, and Tight is above 115.
  • These queue labels are planning heuristics. Layout, gender mix, breaks, fixture type, attendants, and arrival waves can change actual queues.

Technical Details:

The starting count comes from separate attendee-by-hour planning tables for events with and without alcohol. Values between table points use bilinear interpolation and round up to a whole unit. Attendance above 10,000 or duration above 10 hours scales the capped table result proportionally; values below the first 50-person or 1-hour point follow the slope of the first interval before the one-unit floor is applied.

Lookup Core:

Each row lists baseline portable units for event hours 1 through 10. The first table is without alcohol; the second is with alcohol. These are the exact values used before event, food, weather, and comfort adjustments.

Attendees1 h2 h3 h4 h5 h6 h7 h8 h9 h10 h
501111222222
1002222333344
2503334445667
5003455667889
1,00057889910111212
2,0007101315161718192121
5,00017263136394345485154
10,0003044567177849195101128
Attendees1 h2 h3 h4 h5 h6 h7 h8 h9 h10 h
501111222222
1002222333345
2503334455678
50035566789911
1,0006899101012121414
2,0008121517182021212324
5,00019293540444851545760
10,000335063808794102107114130

Formula and Rule Core:

The remaining stages multiply demand factors, apply usable permanent fixtures, reserve accessible units, and derive sanitation, servicing, and cost quantities.

U=ceil(Bpfw(1+c)) X=min(U,Xentered) T=max(0,U-X) A=min(T,max(1,ceil(0.05T),min(K,T))) H=max(0,ceil(T+Xq)-E) V=max(0,ceil(DI)-1)

B is the interpolated baseline, U is adjusted demand, X is entered permanent fixtures capped at adjusted demand, T is portable units, K is clusters, A is accessible units, H is handwash stations to add, and V is mid-event service visits. When the service interval is zero, visits are zero instead of applying the division formula.

Event factors are 1.00 community/corporate, 1.08 reception, 1.15 festival, and 1.05 sporting. Food factors are 1.00 none, 1.04 packaged, and 1.10 prepared; weather factors are 1.00 normal, 1.08 hot, and 1.15 very hot. Prepared food uses one handwash station per 4 toilet access points; other food modes use one per 5.

For public-event planning, any positive portable count below the cluster count is first raised to the number of clusters. Accessible units then equal at least one, 5% rounded up, or cluster coverage, whichever is greatest without exceeding portable units. Private-event planning sets the accessible allocation to zero; it does not determine legal accessibility duties.

Cost is standard units × standard rate + accessible units × accessible rate + added handwash stations × handwash rate + service unit-visits × service rate + delivery/admin fee. The delivery fee applies when any portable unit or added handwash station remains. Monetary values are calculated without currency conversion.

Limitations and Accuracy Notes:

The baseline is a planning chart, and the event, food, weather, comfort, handwash, service, queue, and cost adjustments are planning rules rather than a universal code. Final quantities and placement need local review.

  • Confirm permit, health, accessibility, venue, fire-route, wastewater, and vendor requirements for the event location.
  • The 5% accessible-unit rule is a planning floor. Accessible routes, level placement, maneuvering space, signage, and distribution still need site-specific work.
  • Vendor unit capacity, flushable models, urinals, attendants, cleaning frequency, and crowd demographics can change demand.
  • Inputs and calculations stay in the browser. Exported budgets contain the event and quote assumptions you choose to save.

Worked Examples:

Hot public festival

A six-hour public music festival with 1,000 peak attendees, alcohol, prepared food, hot weather, three clusters, and a 10% comfort buffer starts from a 10-unit baseline. The 1.15 × 1.10 × 1.08 × 1.10 demand factor is 1.50282, so the rounded plan is 16 portable toilets. Three are accessible for cluster coverage, and four handwash stations are added.

References: