Restroom Calculator

Need an estimate for how many porta potties your event needs? Use this handy calculator! For a more specific quote tailored to your needs, call us today at 800-210-8407!

My event is estimated at attendees, for hours.
  • Will there be more women than men?
  • Will there be alcohol served?

Your Estimated Sanitation Services

Based on what you've told us, we've generated this estimate for your needs.

If you have more details or would like expert advice to make sure you get the best sanitation solution, please call us at 800.210.8407.

Estimated Standard Portable Restrooms Needed:0
Estimated Hand Wash Stations Needed:0
Estimated Enhanced Access Restrooms Needed:0

Looking for a custom quote on those items?


Missouri Portable Restrooms

Rent with On Site Companies

LIMITED TIME OFFER: 10% off all Party Packs ordered in the month of May!

Just call us at 636.519.0507 or complete our quick online contact form and mention code: SL10

Accessibility Plus Pack

Accessibility Plus Pack –   $450   $405

Quad Party Pack

Quad Party Pack –  $395  $355

Accessibility Pack

Accessibility Pack –    $340   $306

Trio Party Pack

Trio Party Pack –    $275   $247

Missouri's Most Trusted Family-Owned Business for 18+ Years

Missouri portable restrooms for any occasion

From grad parties to festivals, events big and small | ☆ 4.4 / 5  59 Ratings

Bulk order? Long-term order? Use our easy online quote builder!

On Site has been my go to for the last eighteen years. They are always on time and give us professional service. I have given them a number of different sites to set up on over the years, and they always manage well. Really have no reason to go elsewhere. Great job On Site!

- Anthony Loyal On Site Client

Luxury Restroom Trailers

  • Multiple layouts with gorgeous interiors
  • Running water stalls & sinks
  • Air conditioning
  • Stereos for music
  • Wheelchair accessible options available
  • Shower trailers also available
Restroom trailer interior and exterior
Restroom trailer interior and exterior

Missouri Portable Restrooms for Special Events

On Site Companies has been Missouri’s most trusted source of portable restrooms for over 18 years. We are a proud family-owned and certified woman-owned portable restroom company. Call us for porta potty rentals that are always delivered, serviced, and picked up with the utmost urgency. We use hospital grade disinfectant to sanitize our porta johns for some of the highest standards in the industry. Ask us about our ADA compliant wheelchair accessible porta potties. Our dependable service of clean portable restroom rentals are perfect for:

  • Outdoor events and festivals
  • Weddings
  • Graduation parties
  • Seasonal outdoor businesses
  • Municipalities

Missouri Portable Restrooms for Construction

On Site Companies has been providing construction companies in Missouri portable restrooms for over 18 years. Our porta potties are OSHA compliant and sanitized with some of the highest grade disinfectant on the market. You can always rely on us for dependable and urgent responses to your porta potty rental needs. We have a wide variety of porta john rentals to satisfy your unique needs. If you need wheelchair accessible portable restrooms, look no further than our ADA compliant units. Our hook units, mobile units, and high rise units make for perfect construction portable restroom rentals for:

  • Commercial construction
  • Homebuilders
  • Industrial construction
  • Any job site!