Finish Coverage Calculator
How much finish to buy? Enter your surface area, finish type, and number of coats.
Running out of finish mid-coat is how you ruin a surface you spent three days sanding. With oil-based products that take 24 hours between coats, there's no recovering mid-panel — you'll see that lap line forever.
Enter the total area you're finishing (both sides of a panel count separately), pick your finish, and add a waste factor for brush loading, drips, and touch-ups.
Finish Coverage
Finish needed
22.5fl oz
22.5 fl oz · 0.67 L
Coverage rates used
These are typical coverage rates at a standard wet film thickness. Actual coverage varies by application method, wood porosity, and how heavily you load the brush or pad. Treat these as planning estimates, not guarantees.
| Finish | Coverage / qt |
|---|---|
| Polyurethane (oil or water) | 125 sq ft |
| Lacquer | 125 sq ft |
| Wiping Varnish | 100 sq ft |
| Shellac | 100 sq ft |
| Stain, Oil-Based | 100 sq ft |
| Boiled Linseed Oil | 100 sq ft |
| Milk Paint / Chalk Paint | 100 sq ft |
| Danish Oil / Penetrating Oil | 75 sq ft |
| Hard Wax Oil (Rubio, Osmo) | 250 sq ft |
How many coats?
- Polyurethane: 2–3 coats on bare wood, 1–2 between-coat scuff coats.
- Shellac: 2–3 coats, sanding between each.
- Oil finishes: 3–5 coats, wiping off excess each time.
- Lacquer: 3–5 thin coats.
- Stain: Usually 1 coat — don't double-apply penetrating stain.
Tips
- Measure total area. A tabletop finished on both sides counts twice. Cabinet interiors add up fast.
- Buy one container size up. Having extra is far better than driving to the store with wet varnish on your hands.
- First coat on bare wood absorbs more — especially on end grain and open-pored species like oak and ash.
Useful gear
- Foam applicator pads — drip-free application for oils, varnishes, and wiping finishes
- Nitrile gloves — oil-based finishes do not wash off; your hands will thank you
- Rubio Monocoat — hard wax oil with the best coverage rate on the chart — a little goes a long way
As an Amazon Associate I earn from qualifying purchases.