How To Use

Single Area Jobs

1. Select foam density (applies to entire job)
2. Enter slab length and width
3. Tap settlement depth
4. Tap settlement scenario:
   • 1 Side → Measure lowest edge/corner (one edge or corner dropped, opposite side at original level)
   • 2 Sides → Adds 50% safety margin to “1 Side” calculation for uncertain conditions
   • 3 Sides → Whole slab settled (uniform settlement across entire slab)
5. View results: Weight, Cost, Price, and Profit

Multi-Area Jobs

1. Enter a name for the first area (e.g., “Driveway”)
2. Fill in dimensions, settlement, and settlement scenario
3. A new area button appears automatically
4. Tap the next button and name your second area
5. Repeat for up to 8 areas
6. Job Totals update automatically as you add areas

Understanding Settlement Scenarios

1 Side – Measure Lowest Edge/Corner

Use this when one edge or corner of the slab has dropped below its original level. Measure the deepest point of settlement—the calculator assumes the opposite edge/corner is at the original level (zero drop). This is the most accurate calculation for straightforward tilted slabs.

2 Sides – +50% Safety Margin

This option adds 50% extra material on top of the “1 Side” calculation. Use “2 Sides” when dealing with:

• Soft or unstable ground conditions
• Irregular voids or uncertain settlement patterns
• Jobs where you want a conservative material estimate
• Your gut tells you “This is going to be brutal to lift”.

Important: “2 Sides” is specifically for adding margin to a “1 Side” scenario. Do not use this for whole slab settlement—that’s “3 Sides.”

3 Sides – Whole Slab Settled

Use this when the entire slab has settled uniformly—all corners are at approximately the same depth below the original level. The calculator uses the full settlement depth for material estimation.

Tip: Hover over the info icon (ⓘ) next to “Sides Settled” for quick reference guidance.

Understanding The Results

Per Area

• Weight → Estimated pounds of foam needed
• Cost → Your material cost
• Price → What you charge the customer
• Profit → Price minus Cost

Job Totals (Multi-Area Mode)

• Total Weight → Combined pounds for all areas
• Total Price → Combined customer price
• Total Profit → Combined profit for the job

Settings

Tap the Settings tab to customize:

Pricing

• Price per Pound → What you charge customers (default: $18)
• Cost per Pound → Your material cost (default: $9)

Weight Conversions

PolyCalc™ uses adjusted weight values instead of simple math. A straight calculation would multiply foam density by 27 (the number of cubic feet in a cubic yard)—for example, 4 lb foam × 27 = 108 lbs per cubic yard. However, this assumes foam maintains full expansion under perfect conditions, which doesn’t happen in the field.

Foam compresses under the weight of concrete, and the soil or sub-base beneath the slab can also compress during lifting. The adjusted values below account for these real-world factors. The adjustment for 2 lb foam is significantly higher because lighter density foam compresses far more under load.

Using adjusted values helps prevent underestimating material needs and underbidding jobs.

If your experience suggests different values, you can adjust these conversions in the Settings tab to match your real-world usage.

Default Polyurethane Weight To Volume Conversions

Why Adjusted Weight Values?

It might seem natural to calculate material needs by multiplying foam density by 27 cubic feet per yard. But foam compresses under concrete, and the sub-base can also compress during lifting. Adjusted values account for real-world conditions and help prevent underbidding jobs. The 2 lb foam adjustment is larger because lighter foam compresses more under load.

Important

Estimates only. Does not account for voids, soil conditions, or other variables. Actual material usage may vary. Use results as a starting point—always apply professional judgment.

Bringing This Calculator To Your Website

PolyCalc™ is designed first and foremost to support seasoned estimators evaluating projects in person, which is where Poly Service Pros believes the most accurate and responsible pricing decisions are made. There is no better way to serve your customer and protect your interests than sending a qualified estimator to personally inspect the project site. No calculator can fully account for all relevant project conditions—such as hidden voids, soil composition, access challenges, or structural nuances—that an experienced professional can identify on site.

That said, PolyCalc™ can also be deployed to support a customer-friendly web intake tool to support your estimating process—not replace it. With a special form embedded on your website, homeowners can enter basic project details such as their contact information, slab dimensions, settlement depth, images and settlement scenario across multiple areas. The system then generates a preliminary estimate that is automatically emailed to the customer while sending the same detailed breakdown to your team.