Understanding your result
The headline is the number of bags, boxes or pails to buy for the texture you chose, and the line under it gives the area, the coverage per unit and the overspray allowance. The tiles show the coverage used, the area and the count; the bars show the same area at light, medium and heavy.
Coverage is the number to check. The table says where it came from: the maker’s published range for spray texture, the popcorn maker’s light and heavy figures, or our estimate for hand textures, which vary the most. If your bag prints a figure for your pattern, type it in and the calculator uses it instead.
Texture goes over a primed, finished wall. The finish under it can be lower than for a smooth wall, which the finish level planner shows, and the compound for that finish is on the joint compound calculator. If the job is the opposite, covering an old texture to get a smooth wall, the skim coat calculator counts that. What a contractor charges for texture is on the texture cost calculator.
How we calculate this
The spray texture figures place orange peel in the upper half and knockdown in the lower half of USG’s published 300 to 700 sq ft per 50 lb bag; the popcorn figures are Homax’s published light and heavy coverage for a 13 lb box, with medium between. Hand textures in ready-mix are our estimate, and the bars make the uncertainty visible: a heavy slap-brush texture can use twice the compound of a light skip trowel. The overspray allowance covers what misses the wall, the masking and the practice board.
The calculator counts material only. Primer before texture, and paint after it, are separate; Paints Calculator, our sister site at paintscalculator.com, works out the primer and paint for the same area.
The assumptions behind the numbers
| Assumption | Default | Where it comes from |
|---|---|---|
| Spray texture coverage | 300 to 700 sq ft per 50 lb bag | USG Sheetrock wall and ceiling spray texture submittal |
| Orange peel, knockdown | Upper and lower half of that range | Our placement within USG’s range |
| Popcorn | 250 sq ft light, 150 sq ft heavy per 13 lb box | Homax popcorn ceiling texture dry mix |
| Hand texture | 300 to 600 sq ft per 4.5 gal pail | Our estimate; patterns vary widely |
| Overspray and waste | 15% | Our figure for sprayed and hand textures |
| Finish level under texture | Level 3 (heavy), Level 4 (light) | Gypsum Association GA-214 |
Assumptions last reviewed October 8, 2026.
The calculator does not count the hopper gun and compressor rental, masking plastic, or the extra material for patching texture to match an existing wall, which is mostly skill. It does not handle removing an old popcorn ceiling, which in a house built before 1980 starts with an asbestos test, as the note says. The guide to drywall textures shows how each pattern is made and what it hides; the levels of finish guide explains why texture lets you stop at Level 3.
Two worked examples
A light orange peel on 1,400 sq ft of walls
Sprayed, 50 lb bags, 15% overspray.
- Coverage: 700 sq ft per bag (light orange peel)
- Bags: 1,400 ÷ 700 × 1.15 = 2.3, rounded up to 3 bags
- Medium would also be 3 bags; heavy, 4
A light orange peel over Level 4 walls hides small imperfections without looking textured from across the room. The third bag gives room for a practice board and a second pass where the first was thin.
A 380 sq ft popcorn ceiling, medium
13 lb boxes, 15% overspray.
- Coverage: 200 sq ft per box (between Homax’s 250 light and 150 heavy)
- Boxes: 380 ÷ 200 × 1.15 = 2.19, rounded up to 3 boxes
- Light would be 2 boxes; heavy, 3
Popcorn is a ceiling-only finish. If the job is patching an old popcorn ceiling, test the old texture for asbestos before touching it.
Where to find your inputs
Area. Ceiling: length times width. Walls: perimeter times height, minus large openings. Texture is sprayed over everything, so small openings are not worth subtracting.
Texture and weight. Match a sample board or a photo of the pattern you want; when unsure, medium.
Coverage from the bag. If your product lists coverage for your pattern, use it; it beats any average.
Surface. Ceiling or walls changes only the warnings; popcorn is a ceiling product.
Common mistakes
- No primer. The texture dries blotchy and the paint flashes. Prime first.
- Texturing over a poor finish. Texture hides small marks, not ridges and open joints. Level 3 at least.
- No practice board. Spray patterns depend on the mix, the pressure and the nozzle. Test on scrap.
- Knocking down too early or too late. Wait until the sheen leaves the splatters, then flatten in one light pass.
- Matching patches by eye. Spray texture patches show; feather the patch into the surrounding pattern and prime both.
- Scraping old popcorn without a test. Pre-1980 popcorn may contain asbestos.
Questions people ask
- How much drywall texture do I need?
- USG gives 300 to 700 sq ft per 50 lb bag of its wall and ceiling spray texture, depending on the pattern. A light orange peel is at the top of that range and a heavy knockdown at the bottom. A 1,400 sq ft house of orange peel walls takes about three bags with overspray.
- How much does a box of popcorn texture cover?
- Homax lists up to 250 sq ft per 13 lb box for a light application and 150 sq ft for a heavy one. A 380 sq ft ceiling takes two or three boxes. Small aerosol cans are for patches of a few square feet only.
- What is the difference between orange peel and knockdown?
- Both are sprayed with a hopper gun. Orange peel is left as sprayed, a fine bumpy surface like the skin of an orange. Knockdown is sprayed in larger splatters, left to firm up for 10 to 20 minutes, then flattened with a wide knife, giving a flat-topped, mottled pattern. Knockdown uses more material.
- Do I need to prime before texturing drywall?
- Yes. A drywall primer evens out the different suction of the paper and the joint compound, so the texture dries evenly and the paint over it looks uniform. Paint the texture once it is dry; most textures are primed and painted, not left bare.
- What finish level is needed under texture?
- Level 3 under a medium or heavy texture such as knockdown or hand texture, Level 4 under a light orange peel, according to GA-214. The texture hides what the higher levels would smooth; the finish level planner shows the saving.
- Can I texture with joint compound?
- Yes. Hand textures (skip trowel, swirl, slap brush, stomp) are made with all-purpose ready-mix, thinned and applied with a trowel, brush or roller. Sprayed textures can also be made with thinned compound, but bagged texture sprays more evenly.