Self-Leveling Concrete Calculator
Enter the area of a floor and the thickness of the pour and get the bags of self-leveler to buy, at the coverage printed on the maker's data sheet. A floor that is not a rectangle can be drawn with Draw a shape.
Estimates for planning, not professional advice. Read the full notice.
The drawing did not open. Length and width are still here.
Floor: shape and size
Skip the drawingDrag a round corner to move it. The small hollow diamond on a side is its curve handle: drag it across the side to curve the side (it is not a corner). To add a corner (a new point), tap the side itself, then choose Add a point here. Tapping a corner or a side opens its actions. Drag empty space to move the view; pinch, or Ctrl and the mouse wheel, to zoom. The keys are listed under Keys.
Keys
- Tab
- next corner; each says how far it is from corner 1
- Arrow keys on a corner
- move it one square; ten with Shift; 1/16 in with Alt
- Delete or Backspace
- remove the corner; its two sides join in one straight side
- + on a corner
- add a corner halfway along the next side
- Arrow keys on the drawing
- move the view; farther with Shift
- + and - on the drawing
- zoom in and out
- 0 on the drawing
- show the whole shape
- Ctrl+Z (Cmd+Z on a Mac)
- undo, except inside a typed field (it keeps its own)
- Ctrl+Shift+Z or Ctrl+Y
- redo
- Escape while dragging
- put it back where it was
- Enter on a corner or side
- go to its actions
- Escape in the actions
- close them and go back to the drawing
The drawing did not load. Check your connection and try again.
- Area
- 100 ft²
- Perimeter
- 40 ft
- Cut-out edges
No area until the shape is fixed.
Estimate for planning, from what you entered and the product data shown. Check product labels and your supplier before you buy.
Shape: Rectangle Change
Sides
Corners
Cut-outs
Feet and inches, like 12' 6"
Example: a floor to level
5 50 lb bags
- Self-leveler to pour 2.08 ft³
Your project
Enter a size to see your total.
Each product is rounded up once for the whole project, so the total can be less than the items bought alone added together. A line counted from a cut layout (sheets, boards or tiles laid out piece by piece) is counted for each item and added.
Shopping list
| Item | Size | Buy |
|---|---|---|
| Self-leveling floor resurfacer | 50 lb bag | 5 |
Save on this device
Saved projects
No saved projects yet.
Worked example: a floor to level
Show the working
- Floor area 10 ft × 10 ft = 100 ft²
- Volume to pour 100 ft² × 1/4 in = 2.08 ft³
- Divide by the volume one bag covers (the sheet's coverage at 1/4 in) 2.083333 ft³ ÷ 0.4375 ft³ = 4.76 bags
- Round up once, to whole bags 4.76 bags = 5 × 50 lb bags
Assumptions
The figures behind the example. Sourced figures link to their source below; a default is a starting value to check against your label or supplier.
| Assumption | Value | Details and changes |
|---|---|---|
| Self-leveler waste allowance | 0% | |
| Default No silent overage. Check your label or supplier. | ||
| Volume one 50 lb bag covers, from the sheet's coverage (21 sq ft at 1/4 in) | 21 ft²[1] | |
| QUIKRETE's data sheet gives this coverage for one 50 lb bag of Self-Leveling Floor Resurfacer at a thickness of one quarter inch. | ||
Feet and inches, like 12' 6"
What one bag covers, by thickness
Area one 50 lb bag covers at each thickness, from the sheet's printed coverage, and the bags for a 100 sq ft floor
| Thickness | Area one bag covers | Bags for 100 sq ft |
|---|---|---|
| 1/8 in | 42 ft² | 3 × 50 lb bags |
| 1/4 in | 21 ft² | 5 × 50 lb bags |
| 3/8 in | 14 ft² | 8 × 50 lb bags |
| 1/2 in | 10.5 ft² | 10 × 50 lb bags |
| 5/8 in | 8.4 ft² | 12 × 50 lb bags |
Each area is the sheet's printed coverage (21 sq ft at 1/4 in) spread over that thickness. The sheet's yield figure, in the table below, is slightly larger; the count uses the coverage, the smaller of the two, so it never under-buys.
What the maker's data sheet prints
Figures from the maker's data sheet for the 50 lb bag of its self-leveling floor resurfacer
| Figure | Sheet value |
|---|---|
| Yield of one bag (shown for comparison) | 0.45 ft³ |
| Coverage at the printed thickness | 21 ft² |
| Printed thickness for that coverage | 0.25 in |
| Thickest single pour | 0.625 in |
Figures in the Sheet value column are per QUIKRETE's data sheet, checked Nov 12, 2026.
Product names are trademarks of their owners. HoneyDoMath is not affiliated with, sponsored by or endorsed by these makers. Figures come from each maker's published sheets and are shown for information only.
Source: [1]
The calculator uses the coverage. Your own bag's label comes first: if it prints a different figure, enter it in the assumptions.
Questions
How much self-leveler do I need for 100 sq ft?
It depends on the thickness. The table on this page gives the bags for that area at several thicknesses, and the calculator counts any area and thickness.
How much does a bag of self-leveler cover?
The maker's data sheet prints a yield and a coverage at one thickness, both in the table on this page. Spread over a thinner pour a bag covers more; over a thicker one, less.
What thickness can it be poured?
The maker's data sheet, quoted in the sources, gives the thickest single pour. A floor needing more is poured in layers; read your own bag's label and sheet.
Is a thinner pour counted differently?
No. The calculator multiplies the area by the thickness, adds the waste allowance if you enter one, divides by the bag's yield and rounds up once, at the bag.
Sources (1)
-
QUIKRETE Self-Leveling Floor Resurfacer No. 1249-50 data sheet (opens in new tab), The Quikrete Companies, Revised January 2024.
Manufacturer data.
“At a thickness of 1/4 in (6.3 mm), one 50 lb (22.6 kg) bag will cover an area of 21 ft2 (1.9 m2).”
“At a pourable consistency, a 50 lb (22.6 kg) bag will provide 0.45 ft3 (12.7 L) of material.”
“can be installed from 5/8 inch (16 mm) thick to a feather edge.”
Per QUIKRETE's data sheet, checked Nov 12, 2026. Figures and codes change; verify with the source. Back to where this is used (Source 1)
These are summaries of what the sources say, not professional advice. Codes and product data change. Check with your building department and the product label about your own project.
Sources
- [1] QUIKRETE, QUIKRETE Self-Leveling Floor Resurfacer No. 1249-50 data sheet. Checked November 12, 2026. https://www.quikrete.com/pdfs/data_sheet-self-leveling%20floor%20resurfacer%201249-50%20-51.pdf