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Self-Leveling Underlayment Calculator

Estimate self-leveling compound bags, mixing water, primer area, and depth checks from floor area and pour depth.

Inputs

Floor

Range: 1–100,000 ft2

Range: 0.0625–4 in

Average build-up over the floor. Most residential floors need 1/8 to 1/4 in.

Product and allowance

Range: 5–200 sq ft

At 1/8 in depth, from the product data sheet. Most 50 lb bags cover 20 to 30 sq ft at that depth, and half that at 1/4 in.

Range: 0–30

Many self-leveling products need a primer or a slope-to-level product on porous or absorbent substrates. A primer adds a separate coat that this calculator does not size; use the coating calculator with the product data sheet for the primer.

Range: 0–10 gal

From the product data sheet. Used only to report the mixing water; it does not change the bag count. Enter 0 if you are not mixing yet.

Result

Bags of self-leveling
27.00 bags
Area with waste
330.0
Mixing water for the bags
0.0
Pour volume
6.25
At or under 1/4 in average build-up: within the normal self-leveling range
Follow the product: primer is often required on porous or absorbent substrates

How this was calculated

Bags of self-leveling
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Planning estimate only. Verify the entered measurements, product data sheet, site conditions, and applicable local requirements before ordering or installing. This calculator does not establish product suitability or code compliance.