How Many Porta Potties Do You Need for a Construction Crew?
Start with the crew size and let OSHA 1926.51(c) do the math. The rule is a bracket table, not a flat ratio: 1 toilet seat for 20 workers or fewer, 1 seat and 1 urinal per 40 workers once you pass 20, and 1 seat and 1 urinal per 50 workers at 200 or more. A 15-person framing crew needs one standard porta potty rental. A 60-person job crosses into the second bracket and needs two seats plus urinal capacity. Lehi sees plenty of both, from single-lot builds near American Fork (5.9 miles southeast) to larger subdivisions closer to Saratoga Springs (8.1 miles southwest). If the crew works with paints, coatings or solvents, OSHA 1926.51(f)(1) requires washing facilities for that contaminant exposure specifically, so add a handwashing station rental alongside the toilets, not instead of one. Check our construction site services page for how we bundle toilets with fencing and dumpsters on active sites.
How Many Porta Potties Do You Need for an Event?
Events run on guest count and hours, not worker brackets. As a working rule, figure 1 unit per 50 to 75 guests for a 4-hour event, and add units as the clock runs longer or the beer taps open.
| Guests | 2-4 hours | 5-8 hours | With alcohol |
|---|---|---|---|
| 100 | 2 units | 3 units | 3-4 units |
| 250 | 4 units | 5-6 units | 6-7 units |
| 500 | 7-8 units | 9-10 units | 11-12 units |
| 1000 | 14 units | 16-18 units | 18-20 units |
Alcohol changes bladder frequency and line behavior, so bump the count up a tier rather than trust the base ratio. A wedding for 150 guests over 5 hours with a bar should land around 5 units, mixing standard porta potty rental units with at least one ADA accessible porta potty. Multi-day festivals need daily service built into the quote, not a single drop and pickup. Our festival restroom rental and wedding restroom rental pages break down unit mix by venue type.
What Does ADA Require for Accessible Units?
ADA Standards section 213.2 requires that where single-user portable units are clustered, at least 5 percent be accessible, and never fewer than one. So a cluster of 8 standard units still needs one accessible unit, not zero. The accessible unit itself has to meet real dimensions: ADA Standards section 403.5.1 sets a 36 inch minimum clear route to the door, section 404.2.3 sets a 32 inch minimum clear door opening, and section 304.3.1 requires a 60 inch turning circle inside. Section 405.2 caps ramp slope at 1:12 if the unit sits above grade. Skipping this isn't just a compliance gap, it turns away guests and workers who can't use a standard unit. Add one ADA accessible porta potty to any event or jobsite order in Lehi and confirm placement meets the route width before delivery day. Our ADA restroom requirements guide covers the full spec list if you're planning a permanent-feeling setup for a multi-week job.
How Long Should You Rent For?
Duration changes both the unit count and the price per day. A single-day event pays a different rate than a month-long jobsite, and the math doesn't scale down cleanly, longer terms cost more in total even though the daily rate drops.
| Duration | Standard unit | Notes |
|---|---|---|
| Day | $100-$350 | Best for one-day events |
| Week | $130-$500 | Common for short jobsites |
| Month | $125-$325 | Standard for active construction |
| Weekend | $125-$400 | Covers Friday drop to Monday pickup |
A remodel crew working 6 weeks near Draper (8.4 miles north) should book monthly, not week to week, since the per-unit cost per day drops as the term extends. Check porta potty rental cost and monthly porta potty rental for how we structure longer holds, and porta potty rental per day if you're only covering a weekend pour.
How Do Dumpster Size and Unit Count Work Together on a Jobsite?
Toilets and dumpsters get sized off the same crew and schedule numbers, so it's worth planning them together. A 10 yard dumpster runs about 10 by 8 by 4 feet, which is how many feet a 10 yard dumpster measures, roughly 135 cubic feet, which answers how many cubic feet are in a 10 yard dumpster, and suits small cleanouts. A 10 yard dumpster runs close to 12 feet long. A 20 yard dumpster measures close to 22 feet long and holds around 20 cubic yards, roughly 540 cubic feet, and typically carries 2 to 3 tons of debris depending on material, answering how many tons a 20 yard dumpster holds. That answers how many tons a 30 yard dumpster can hold: a 30 yard dumpster holds around 810 cubic feet and can carry roughly 3 to 4 tons. A 40 yard dumpster holds about 1,080 cubic feet, which covers how many cubic feet are in a 40 yard dumpster, and can carry roughly 4 to 5 tons on mixed construction debris, which covers how many tons a 40 yard dumpster holds. Match dumpster size to crew size the same way you match toilet count to headcount: a 15-person crew running a 6-week remodel usually pairs a 20 yard dumpster rental with one standard toilet, while a full subdivision build often needs a 30 yard dumpster rental or 40 yard dumpster rental alongside two or more toilets. See dumpster sizes and dimensions and dumpster weight limits before you order, since overloading changes the bill.
Do You Need More Units for a Multi-Day or Overnight Event?
Yes, and the increase isn't linear with hours, it's driven by service frequency. ANSI/PSAI Z4.3 sets a baseline service interval of once per week for up to 10 users over a 40 hour week, which is built for steady jobsite use, not a 3-day festival with 2,000 daily attendees. Multi-day events need daily servicing scheduled in advance, and Lehi Porta Pros routes trucks for that before the gates open, not after complaints start. A single-day 500-guest concert needs the 7-8 unit range from the table above; stretch that same event to 3 days and you either add units or add service visits, and most planners choose both. Camping and farm events near Riverton (13.0 miles northwest) often run this way over a long weekend. Check concert restroom rental and county fair restrooms for multi-day service plans, or camping porta potty for extended outdoor stays.
Worked Examples: What Would You Actually Order?
A 45-person Lehi framing crew on an 8-week build falls in the OSHA 1926.51(c) bracket above 20 workers, so plan on 2 units minimum, one of them ideally a deluxe flushable porta potty for supervisor and office trailer use. Add a handwashing station rental if the crew is painting or staining. A 300-guest outdoor wedding running 6 hours with a bar lands at 6-7 units per the event table, plus one ADA unit under section 213.2, so 7-8 units total, alongside a restroom trailer rental if the couple wants something nicer than standard units. A 2-day 800-person food festival needs the higher end of the 500-guest row scaled up, daily servicing under the Z4.3 baseline, and a mix of standard porta potty rental and ADA units. Every one of these examples starts from the same two numbers: headcount and hours. Get a firm count from request a quote and we'll size the order before delivery day, not after.
How many porta potties do I need for 100 people?
For a 4-hour event, plan on 2 units for 100 guests, rising to 3 if the event runs past 5 hours. Add a unit if alcohol is served, since it increases bathroom trips. Always include at least one ADA accessible porta potty per ADA Standards section 213.2.
How many toilets does OSHA require per worker?
OSHA 1926.51(c) requires 1 toilet for 20 workers or fewer, 1 seat and urinal per 40 workers from 20 up, and 1 seat and urinal per 50 workers at 200 or more. Crew size, not job duration, sets the bracket.
How many tons does a 30 yard dumpster hold?
A 30 yard dumpster holds roughly 810 cubic feet and typically carries 3 to 4 tons of mixed construction debris. Actual weight depends heavily on material density, so check dumpster weight limits before loading concrete or shingles.
How many cubic feet are in a 20 yard dumpster?
A 20 yard dumpster holds about 540 cubic feet, running roughly 22 feet long. It typically carries 2 to 3 tons depending on debris type. See dumpster sizes and dimensions for full measurements across sizes.
Do I need more porta potties if alcohol is served?
Yes. Alcohol increases restroom frequency, so bump your unit count up one tier from the base event table. A 250-guest event goes from 4 units to 6-7 with a bar running. Plan service visits accordingly for multi-day events.
How far in advance should I book porta potties in Lehi?
Book as soon as your headcount and dates are firm, especially for weekend events when demand across Lehi and nearby American Fork and Draper peaks together. Jobsite rentals can often move faster since crews already have OSHA 1926.51(c) counts locked in.
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Get a delivery date
Tell us the address, the dates and the headcount. We size the order and confirm the route.