Paint sheen guide

Flat, eggshell, satin, semi-gloss, gloss — by the gloss-unit numbers that actually define them, not just the room they belong in. Pick a surface and read back the standard sheen, how washable it is, and the drywall finish it forces.

01 How the chart works

Sheen is a measurement, not a mood. The dried film is read on a gloss meter at a fixed angle, and the number that comes back sorts the paint into a level. The Master Painters Institute (MPI) uses seven levels, G1 through G7, and the test method is ASTM D523.

The 60° reading is the main one. The low-sheen paints all read near zero at 60°, so a second 85° reading is taken to separate flat from velvet from eggshell. That is the whole reason two angles exist — one number can't tell the bottom three levels apart.

Two rules fall straight out of that scale. Washability rises with the number: more gloss means more resin at the film surface, a harder and less porous skin that takes a scrub. Hiding falls with the number: the same reflectivity that cleans well also bounces light across the wall and shows every seam and sanding scratch. Flat hides the most and cleans the least; high-gloss is the reverse.

The brand names on the can are not standardized — the gloss numbers are. One company's "satin" can land a band away from another's, which is why the MPI level, not the label, is the thing to match when you are trying to repaint one wall to match the next.

02 Worked example

Take the single-room repaint: a bedroom with 383 ft² (35.6 m²) of wall, no ceiling. It is a low-traffic room, so the standard call is eggshell — MPI G3, 10–25 units at 60°. Enough washability to wipe a mark, soft enough that it sits happily over a standard Level 4 drywall finish.

The paint quantity doesn't care which sheen you pick. At the standard 375 ft²/gal (34.8 m² per 3.79 L) on a smooth, primed wall, two coats need 766 ft² of coverage — 2.04 gallons (7.74 L), rounded up to 3 gallons (11.4 L). The same three gallons buy eggshell, satin, or semi-gloss; the sheen changes the finish, not the gallon count.

Had the plan called for semi-gloss on those same bare drywall walls, the gallon count still holds — but the prep underneath it does not. That is the section below.

03 When this chart is wrong

A room-by-room sheen chart leaves out the one thing that costs real money: sheen is a prep decision, not just a look. Semi-gloss and gloss (G5–G6, 35–85 units at 60°) reflect enough light to telegraph every fastener line, taped seam, and sanding scratch under raking light. That is why they call for a GA-214 Level 5 drywall finish — a skim coat over 100% of the board. Flat and eggshell (G1–G3, 0–25 units) are standard at Level 4, which finishes only the joints and fasteners. Choose semi-gloss for a bare drywall wall and you have quietly signed up to skim-coat the whole wall first. Pick the sheen before the drywall finisher leaves, not at the paint counter.

The counter runs the other way for woodwork. On trim, doors, and cabinets — milled or factory-smooth surfaces, not taped drywall — the Level 5 question never arises, and semi-gloss (G5) is the right durable, washable choice. The rule is about large drywall fields under raking light, not casing.

• Sheen does not change coverage. The gallon count comes from area, coats, and the surface condition, not the sheen. Do not let a shinier can talk you into buying more paint; the extra cost of a high sheen is in the prep, not the bucket.
• Deep and saturated colors behave like a higher sheen. A deep base carries more colorant and less white, which raises surface gloss a notch and shows roller lap marks more readily — a "flat" deep accent can read closer to eggshell in raking light.
• The convention is not a code. The surface-to-sheen list is industry practice, not a requirement. A wipeable eggshell in a guest bath or a flat-finish feature wall in a hallway are both defensible; they just trade washability against hiding differently than the default.
• Exterior sheen fights mildew and chalking, not fingerprints. On siding, the reason to step up from flat to satin is dirt-shedding and film durability in weather, not cleanability of handprints — so the interior logic above only half-applies outdoors.

04 What to do with the result

Match the sheen to the surface from the lookup, then carry the MPI level — not the brand's sheen name — to the store, especially when you are trying to blend a repair into an existing wall. If the lookup lands on semi-gloss or gloss over drywall, settle the finish level first: confirm the board is skimmed to Level 5, or drop to satin and accept a touch less scrub resistance in exchange for forgiving the Level 4 field you already have.

For the quantity, take the rounded-up gallon figure above and buy it in the sheen you chose. If you are covering a bare or patched wall, prime first — the coverage figure assumes a primed surface, and an unprimed wall drinks the first coat regardless of sheen.

05 Common questions

What is the difference between eggshell and satin?

Gloss. Eggshell is MPI G3 at 10–25 units (60°); satin is G4 at 20–35 units. Satin is a step shinier and more washable, which is why it goes on high-traffic and damp walls, while eggshell is the default for low-traffic bedrooms and living rooms.

What sheen should I use on a bathroom?

Satin (G4) on the field walls for moisture resistance and cleanability, stepping to semi-gloss (G5) right at the splash zone around a tub or sink. Semi-gloss everywhere reads glossy and shows wall defects under the vanity light; satin is the balance most baths want.

Why does flat paint look blotchy when I touch it up?

Because flat is porous and its low reflectance makes any difference in film thickness or age visible as a dull-vs-slightly-different patch. Flat hides surface defects best but touches up worst — the fix is to re-coat the whole wall corner to corner, not to spot-dab it.

Does a higher sheen cover more or less area per gallon?

Neither — sheen doesn't change coverage. Coverage is set by the product, the number of coats, and the surface, not the gloss level. A flat and a semi-gloss from the same line both cover about 350–400 ft²/gal (32.5–37.2 m²) on a smooth, primed wall.

What sheen is best for ceilings?

Flat (G1, 0–5 units at 60°). A ceiling is the plane that catches the most raking light from windows, so any sheen there spotlights drywall butt joints and roller marks. Flat hides them, and ceilings rarely need to be scrubbed.

Can I match a "satin" from one brand with another brand's satin?

Not reliably by name. Brand sheen names are not standardized, so one maker's satin can sit in a different MPI band than another's. Compare the published gloss level (or gloss units at 60°) rather than the word on the label.