Self-leveling concrete and resurfacer calculator
Enter the floor area, the average depth and the product to see how many bags to buy. Measure depth in several spots — floors are rarely out by the same amount everywhere.
Enter your measurements
More options: Extra
- One bag covers, at this depth
- 21.6 sq ft
- Material needed (incl. extra)
- 2.29 cu ft
- Area
- 100 sq ft
10 ft × 10 ft = 100 sq ft × 0.25 in + 10% = 2.29 cu ft
÷ 0.45 cu ft per bag = 6 bags (one bag covers 21.6 sq ft at this depth)
- Prime the floor with the maker’s primer, dam doorways and drains, and mix full bags with measured water: self-levelers flow only at the right consistency.
Quick answers for common sizes
| Example | Answer |
|---|---|
| Self-leveling concrete coverage per bag | About 21 sq ft per 50 lb bag at ¼ in |
Bags for the area above at other depths
| Average depth | Bags to buy | One bag covers, at this depth |
|---|---|---|
| 1/16 in | 2 bags | 86.4 sq ft |
| 1/8 in | 3 bags | 43.2 sq ft |
| 1/4 in | 6 bags | 21.6 sq ft |
| 3/8 in | 8 bags | 14.4 sq ft |
| 1/2 in | 11 bags | 10.8 sq ft |
Self-levelers and resurfacers are sold by the bag with a coverage at a stated thickness. Quikrete’s Self-Leveling Floor Resurfacer, for example, yields about 0.45 cu ft per 50 lb bag, which covers about 21 sq ft at ¼ in. Coverage halves every time the depth doubles, so measure carefully: the depth you guess is the biggest error in the count.
bags = area (sq ft) × depth (in) ÷ 12 × (1 + extra) ÷ bag yield (cu ft) one bag covers = bag yield ÷ (depth ÷ 12)
| Product | Bag | Coverage (data sheet) | Depth range |
|---|---|---|---|
| Quikrete Self-Leveling Floor Resurfacer | 50 lb | ≈ 21 sq ft at ¼ in (0.45 cu ft) | feather edge to ⅝ in |
| Quikrete Fast-Setting Self-Leveling | 50 lb | over 21 sq ft at ¼ in | feather edge to 1½ in |
| Quikrete Re-Cap Concrete Resurfacer | 40 lb | ≈ 16 sq ft at ¼ in, 65 sq ft at 1/16 in | up to ½ in |
| Sakrete Flo-Coat Resurfacer | 40 lb | 18 sq ft at ¼ in, 72 sq ft at 1/16 in | see label |
| Quikrete Sand/Topping Mix | 80 lb | ≈ 0.66 cu ft | see label |
A worked example for a 10 × 10 room is on self-leveling concrete coverage per bag.
Measuring an uneven floor
Lay a long straightedge across the floor in a grid and measure the gap under it every couple of feet. Average the readings for the depth. If one corner is ¾ in low and the rest is flat, work out that area separately — it may need a deeper-rated product or a patch first.
Tips
- Prime first with the maker’s primer; without it the floor can suck water out of the leveler and cause pinholes or poor bond.
- Dam doorways and seal cracks so the liquid doesn’t run away under walls or down drains.
- Work fast with a helper: one mixing, one pouring and spreading. Self-levelers set quickly.
- Use spiked shoes to walk into wet leveler without leaving marks.
What you’ll need
- Gauge rakeMid-range price
Spreads self-leveling underlayment to a set depth so it can flow out flat.
See options on Amazon (opens in a new tab) - Spiked shoesBudget price
Strap-on spikes let you walk on wet self-leveler to spread and smooth it without leaving footprints.
See options on Amazon (opens in a new tab) - Drill mixing paddleBudget price
Mixes mortar, self-leveler, stucco and grout in a bucket. Use a low-speed, high-torque drill so the mix doesn’t fly.
See options on Amazon (opens in a new tab) - Square-point shovelBudget price
Pushes and places concrete, and loads sand and gravel. The flat blade spreads a pour better than a round-point shovel.
See options on Amazon (opens in a new tab)
As an Amazon Associate we earn from qualifying purchases. Links to products are affiliate links — they cost you nothing extra and help keep these calculators free.
Frequently asked questions
How many square feet does a bag of self-leveling concrete cover?
About 21 sq ft at ¼ in for a 50 lb bag of Quikrete Self-Leveling Floor Resurfacer, 42 at ⅛ in and about 13 at ⅜ in. Other brands differ — read the bag.
How much does a bag of Re-Cap cover?
Quikrete says a 40 lb bag of Re-Cap covers about 16 sq ft at ¼ in, or about 65 sq ft at 1/16 in.
Can I pour self-leveler thicker than the label says?
Not in one pour. Each product has a maximum depth on its data sheet; deeper fills need a product rated for it, or a fill of sand/topping or concrete first.
Sources
- Quikrete Self-Leveling Floor Resurfacer (No. 1249-50) data sheet (opens in a new tab) — 50 lb bag ≈ 0.45 cu ft; about 21 sq ft at 1/4 in; from feather edge to 5/8 in.
- Quikrete Fast-Setting Self-Leveling Floor Resurfacer (No. 1249-51) data sheet (opens in a new tab) — 50 lb bag ≈ 0.45 cu ft, over 21 sq ft at ¼ in; feather edge to 1½ in.
- Quikrete Re-Cap Concrete Resurfacer (No. 1131) data sheet (opens in a new tab) — 40 lb bag covers about 16 sq ft at 1/4 in or 65 sq ft at 1/16 in; up to 1/2 in total.
- Sakrete Flo-Coat Resurfacer technical data sheet (opens in a new tab) — 40 lb: 0.4 cu ft, 18 sq ft at 1/4 in, 72 sq ft at 1/16 in.
- Quikrete Sand/Topping Mix (No. 1103) data sheet (opens in a new tab) — 80 lb ≈ 0.66 cu ft, 60 lb ≈ 0.5, 40 lb ≈ 0.33.