Self-Leveling Compound Calculator
Calculate how many bags of self-leveling compound, self-leveler, floor leveler, or self-leveling concrete you need. Enter area and depth to get bag count with coverage automatically adjusted for your pour thickness.
Part of the Surfaces & Finishes calculators — see all tools in this category.
Enter floor area and pour depth to see bag counts.
Total area to be leveled
Common depths: 1/8" (0.125), 1/4" (0.25), 1/2" (0.5)
Typical: 10% for mixing losses and minor errors
Check product label for coverage specs. Default: 40 sq ft per 50 lb bag at 1/8" depth.
Product coverage per bag at the reference depth
Depth at which coverage is specified (usually 1/8" = 0.125)
Results
How it works and assumptions
Before estimating, read Calculating Concrete Shapes and Screed Bag Yields for measurement examples and the distinction between concrete, premixed screed and binder-only products.
This calculator helps you determine how many bags of self-leveling compound, self-leveler, or floor leveler to purchase for floor preparation, automatically adjusting coverage based on your actual pour depth.
- Enter floor area to be leveled: Input the total area in square feet that needs to be leveled. Measure length times width for rectangular rooms.
- Enter desired pour depth: Input the depth in inches. Common depths are 1/8" (0.125) for minor leveling, 1/4" (0.25) for moderate unevenness, and 1/2" (0.5) for significant variations.
- Enter product yield from bag: Check your product label for coverage specs. Default is 40 sq ft per 50 lb bag at 1/8" depth. Most products list coverage at a specific reference depth.
- Calculator adjusts yield automatically: The calculator scales coverage based on your actual depth versus the reference depth. Deeper pours = less coverage per bag.
- View bags needed: See total bags required including your selected waste factor. Warning appears if depth exceeds typical self-leveling limits.
Formula: Adjusted Yield = Reference Yield × (Reference Depth ÷ Actual Depth)
Bags Needed = Floor Area ÷ Adjusted Yield × (1 + Waste%)
Self-Leveling Coverage per 50 lb Bag
This table uses the page default assumption: one 50 lb bag covers 40 sq ft at 1/8" depth. Coverage drops in proportion to pour depth, so doubling the depth cuts square-foot coverage in half.
| Pour depth | Coverage per 50 lb bag | Bags for 100 sq ft | Typical use |
|---|---|---|---|
| 1/8 inch | 40 sq ft | 3 bags | Minor feathering and low spots |
| 1/4 inch | 20 sq ft | 5 bags | Moderate floor flattening |
| 1/2 inch | 10 sq ft | 10 bags | Noticeable dips or transitions |
| 1 inch | 5 sq ft | 20 bags | Deep pours within product limits |
Bag counts above exclude waste. Add 5-15% for uneven slabs, absorbent substrate conditions, and installation loss before rounding up to whole self-leveler bags.
Frequently Asked Questions
Sources and revision
Page revision: 2026-10-12