Units of measure for drywall
Each piece of drywall work has its own unit, and keeping them apart is what makes the estimate checkable. These are the units estimators use and how each is measured.
| Item | Unit | How it's measured |
|---|---|---|
| Gypsum board | SF of board | Wall length × height × sides × layers, less openings; ceilings by area. |
| Sheets | each | Board SF with waste ÷ sheet size (4 × 8, 4 × 10 or 4 × 12). |
| Joint compound | buckets | About 10 gallons per 1,000 SF of board, in 4.5-gallon buckets (tool default). |
| Tape | rolls | About 370 LF per 1,000 SF, 500 LF rolls (tool default). |
| Corner bead | LF / sticks | Outside corners by LF, in 10 ft sticks. |
| Finishing | SF by level | Board SF grouped by finish level (Level 4 standard, Level 5 where specified). |
How estimators take off drywall
- Measure walls by type, side and layer. One-side and two-side walls, single and double layer, rated and non-rated are separate items. Height is to where the board stops, which may be above the ceiling on rated walls.
- Deduct only large openings. Deduct doors, windows and storefronts. Many estimators ignore small openings because the cut-offs are waste anyway.
- Add ceilings and soffits. Drywall ceilings and bulkheads are measured by area and are slower to hang and finish than walls.
- Convert to sheets and accessories. Add 10% waste (tool default), round to sheets by length, then work out mud, tape, screws (1 per SF) and bead from board SF.
- Price hanging and finishing separately. Hanging and taping have separate production rates and crews. Price each from its own crew-day rate.
Waste factors and order quantities
Waste covers cut-offs, breakage, laps and spillage, and it's added to the net quantity before rounding up to what the supplier sells. Figures marked as tool defaults are the same ones the Trade Takeoff Worksheets start with, and you can edit them there.
| Item | Factor | Notes |
|---|---|---|
| Gypsum board | 10% | Tool default for cut-offs and breakage; order sheet lengths that match wall heights to lower it. |
| Joint compound | 10 gal / 1,000 SF | Tool default for Level 4, all coats. |
| Tape | 370 LF / 1,000 SF | Tool default. |
Crew production rates
Labor is quantity divided by production. These rates are per 8-hour crew-day for commercial work, from the same library as the crew-day production estimator: typical mid-range planning values with a low-to-high range, not a promise of output. Crew skill, layout, access and weather move them, and your own crews' records beat any library.
| Activity | Crew | Low | Typical | High | Labor |
|---|---|---|---|---|---|
| Hang gypsum board, walls | 2 hangers | 1,800 | 2,400 SF board | 3,000 | 0.7 hrs per 100 SF board |
| Tape and finish, level 4, all coats | 2 finishers | 1,200 | 1,600 SF board | 2,000 | 1.0 hrs per 100 SF board |
| Acoustical ceiling grid and tile | 2 installers | 800 | 1,000 SF | 1,400 | 1.6 hrs per 100 SF |
- Hang gypsum board, walls 1,800 to 3,000 SF board, typical 2,400
- Tape and finish, level 4, all coats 1,200 to 2,000 SF board, typical 1,600
- Acoustical ceiling grid and tile 800 to 1,400 SF, typical 1,000
Worked example: 40,000 SF of board
The activity is hang gypsum board, walls, with a crew of 2 hangers at the typical rate of 2,400 SF board per crew-day:
- Crew-days: 40,000 SF board ÷ 2,400 = 16.7 crew-days.
- Labor hours: 16.7 crew-days × 2 workers × 8 hours = 267 hours.
- Range: 13.3 crew-days at the high rate to 22.2 at the low rate, a spread of 8.9 crew-days on the same quantity.
Multiply the labor hours by your burdened hourly cost to price the labor. The spread between the low and high rate is why production is the assumption to check first on a drywall bid: the same takeoff can carry very different labor. Run your own quantities in the crew-day production estimator, and get the burdened rate from the labor burden calculator.
What drives the cost
- Finish level. Level 5 adds a skim coat over the whole surface and is priced as a separate item.
- Height and access. Board above 10 to 12 ft needs lifts or scaffolding and slows both hanging and finishing.
- Rated assemblies. Multiple layers, shaft walls and fire caulking add material and labor.
- Sequencing. Rework after other trades' rough-in and multiple mobilizations are frequent sources of lost margin.
Common exclusions and clarifications
A drywall price is only as good as the scope it describes. These exclusions come from our scope library for drywall, framing and ceilings (CSI 09 21 00 / 09 51 00); list the ones that apply so the GC levels your number fairly.
- Acoustical ceiling tile and grid unless listed as included.
- Level 5 finish, veneer plaster or specialty textures.
- Exterior sheathing, air and water barriers.
- Blocking not shown on the drawings or requested after framing inspection.
- Access panels, which are to be furnished by the trade requiring them.
- Firestopping of penetrations made by other trades.
Clarifications that often go with them:
- Level 4 finish unless noted; Level 5 where specifically scheduled.
- Patching after other trades is by time and material.
Pick, edit and export these in the scope inclusions and exclusions library, or load them straight into a proposal with the bid proposal builder.
Free tools for drywall estimating
- Trade takeoff worksheets: measure drywall areas and get order quantities with the same waste factors, then download an Excel takeoff.
- Crew-day production estimator: turn drywall quantities into crew-days, duration and labor hours with the rates on this page.
- Labor burden calculator: find the true cost of a crew hour, with taxes, insurance and benefits.
- Scope inclusions and exclusions library: pick proposal-ready drywall exclusions and clarifications.
- Bid proposal builder: send a branded drywall proposal with the scope language loaded.