Self-Leveling Concrete Calculator
Work out how many bags of self-leveling compound a floor needs. Enter the floor length and width and the pour depth — even a thin ¼–½ in skim adds up fast — and the calculator returns the number of 50 lb bags.
How it works
Volume (cu ft) = length × width × (depth ÷ 12), plus waste. A 50 lb bag of self-leveling underlayment yields roughly 0.5 cu ft, so bags = volume ÷ 0.5, rounded up. Coverage per bag drops fast as the pour gets deeper.
Frequently asked questions
How much self-leveler do I need?
It scales with area and depth: a 50 lb bag covers about 24 sq ft at ¼ in, but only about 12 sq ft at ½ in. Enter your floor size and target depth for a bag count.
How thick can you pour self-leveling concrete?
Most products pour from about ⅛ in up to 1 in in a single lift (some allow more with aggregate). Check the specific bag — deeper pours need more bags per square foot.
How is coverage per bag calculated?
Coverage = bag yield ÷ depth. At ¼ in a 0.5 cu ft bag covers ~24 sq ft; double the depth and coverage halves. The calculator shows the per-bag coverage at your chosen depth.
Related calculators
All concrete calculators
- Concrete Block Calculator
- Cubic Yards of Concrete Calculator
- Concrete Cost Calculator
- Concrete Footing Calculator
- Concrete Driveway Calculator
- Concrete Steps Calculator
- Concrete Column Calculator
- Concrete Wall Calculator
- Post Hole Concrete Calculator
- Concrete Patio Calculator
- Concrete Sidewalk Calculator
- Concrete Mix Ratio Calculator
- Concrete Weight Calculator
Estimates are for planning only. Material yields, densities and code requirements vary — confirm quantities with your supplier and local building code before ordering.