Furniture Finish Schedule Calculator

Calculate finish material quantities, dry times, and total project timeline for polyurethane, lacquer, oil, shellac, and other wood finishes.

Inputs

Surface area (sq ft)

Finish (0=OilPoly..5=Shellac 6=WipeOn)

Number of coats

Sand between coats

Ambient temperature (F)

Relative humidity (%)

Apply stain first

Tab to move between fields

Results

Finish needed (quarts)

0.72

Dry time between coats (hrs)

Stain needed (quarts)0

Application time per coat (hrs)0.3

Total hands-on time (hrs)1.7

Total elapsed time (hrs)13.7

Total elapsed (8-hr days)1.7

Full cure time (days)30

Finish NameOil polyurethane

How to Use This Calculator

Enter the Surface Area in square feet and select the Finish Type (oil poly, water poly, lacquer, oils, shellac).
Enter the Number of Coats, whether to Sand Between Coats, and current Temperature and Humidity.
Indicate whether you are applying a stain before the topcoat.
Review Finish and Stain quantities in quarts, Dry Time Between Coats adjusted for your shop conditions.
Check Total Elapsed Days (8-hr workdays) and Full Cure Time to schedule the project timeline.

How the result changes with Surface area (sq ft)

Surface area (sq ft)	Finish needed (quarts)	Dry time between coats (hrs)
51	1.22	6
176	4.22	6
325	7.8	6
450	10.8	6

What each input means

Surface area (sq ft): Total surface area to finish. A dining table top is ~18 sq ft; with legs/apron ~30 sq ft.
Finish (0=OilPoly..5=Shellac 6=WipeOn): Select the finish (0=oilpoly..5=shellac 6=wipeon)
Number of coats: Typical: 3 coats for poly/lacquer, 3-5 for oil finishes, 3 for shellac.
Sand between coats: Sanding between coats with 220-320 grit. Recommended for best adhesion.
Ambient temperature (F): Shop temperature. Below 60F significantly slows drying.
Relative humidity (%): High humidity (>65%) slows dry time, especially for oil-based finishes.
Apply stain first: Whether to apply wood stain before the topcoat finish.

What each result means

Finish needed (quarts): Quarts of topcoat finish for all coats.
Stain needed (quarts): Quarts of stain (0 if not staining).
Dry time between coats (hrs): Adjusted recoat wait time based on temperature and humidity.
Application time per coat (hrs): Estimated hands-on time to apply one coat.
Total hands-on time (hrs): Active working time for staining, coating, and inter-coat sanding.
Total elapsed time (hrs): Wall-clock time from start to last coat dry, including wait times.
Total elapsed (8-hr days): Elapsed time expressed in 8-hour working days.
Full cure time (days): Days until finish is fully hardened and safe for normal use.

How this is calculated

Worked example, using the default values

Identify Input Parameters
4 parameters
Surface area (sq ft) = 30, Finish (0=OilPoly..5=Shellac 6=WipeOn) = 0, Number of coats = 3, Sand between coats = 1 = 7 input(s) provided
Calculate Finish needed
Finish needed = (surfaceAreaSqFt * numCoats) / coveragePerQt
0.72 = 0.72
Calculate Dry time between coats
Dry time between coats = baseDryTime * tempFactor * humidityFactor
6 = 6
Calculate Stain needed
0 = 0
Calculate Application time per coat
0.3 = 0.3

Engine last updated July 28, 2026. Checked against 2 independently-derived tests — how we verify calculators.

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