Interior Paint Calculator Project Checklist

Introduction

A paint project fails in the planning, not the painting: the forgotten primer, the second store trip for tape, the recoat rushed before dinner. This checklist sequences the whole job — measuring, shopping, prep, painting, and cleanup — so nothing gets missed and nothing gets done out of order.

Quantities for the shopping section come from the Interior Paint Calculator; the techniques referenced are detailed in the pro tips guide.

Phase 1: Measure and Estimate

• Sketch each room’s floor plan and note length, width, and ceiling height (measure height in two spots).
• Count doors, windows, and large openings per room; note anything oversized for individual measurement.
• Measure trim in linear feet: baseboard perimeter plus ~20 ft per door casing and ~15 ft per window casing.
• Note wall condition per room: previously painted, bare drywall, heavy texture, stains, or drastic color change — this decides primer needs (see the material guide).
• Run every room through the Interior Paint Calculator: walls, ceilings, and trim as separate line items.
• Decide sheens per surface: flat ceilings, eggshell living areas, satin kitchens/halls, semi-gloss trim.
• Check the build year: pre-1978 means testing old paint before any sanding or scraping (see code compliance).

Phase 2: Shop (One Trip)

• Wall paint per the calculator, all gallons of one color bought together — check batch codes match.
• Ceiling paint (flat white, usually) per the calculator.
• Trim paint in quarts per the linear-foot estimate.
• Primer: PVA for bare drywall, stain-blocking for stains/dark colors, bonding for glossy surfaces — one coat’s worth.
• Roller covers matched to wall texture (3/8 in smooth, 1/2 in light texture), plus a frame and extension pole.
• Quality 2–2.5 in angled sash brush for cutting in.
• Painter’s tape (1–2 rolls), drop cloths (canvas preferred), paint tray + liners.
• 5-gallon bucket for boxing multiple gallons into one consistent batch.
• Prep consumables: spackle, sanding sponges (120–150 grit), caulk + gun, TSP-substitute cleaner.
• Ventilation: box fan for the window; low-VOC paint for bedrooms and nurseries.
• Keep all receipts and photograph can labels (color formulas) for touch-ups.
• Confirm drying logistics: where will painted doors or trim pieces cure undisturbed overnight? Plan the space before the paint is wet.

Full pricing for this list is in the cost guide; the measuring technique behind it in the estimating guide.

Phase 3: Prep the Room

• Clear the room: furniture to the center, covered; remove outlet and switch covers; take down curtains, blinds, and wall fixtures.
• Lay drop cloths over floors and remaining furniture.
• Fill nail holes and dents with spackle; caulk trim-to-wall gaps; sand repairs flush when dry.
• Scuff-sand any glossy surfaces (120–150 grit).
• Clean walls: wipe down dust and grease, especially kitchens; let dry completely.
• Spot-prime repairs; full-prime bare drywall, stains, and drastic color changes.
• Tape trim, windows, and door frames; press tape edges firmly.
• Box the paint: pour all gallons of each color into the 5-gallon bucket and mix.
• Ventilate: open windows, set the fan exhausting outward; confirm room temperature is within the can’s range (~50–85°F / 10–29°C).

Phase 4: Paint Day Sequence

• Ceiling first: cut in edges, roll the ceiling, let dry.
• Walls second: one wall at a time — cut in the edges, then immediately roll while the cut-in is wet (maintain the wet edge).
• Respect recoat times: 2–4 hours for latex (check the can); longer in cold or humidity. Do not rush this — see the common mistakes guide for what impatience costs.
• Second coat on walls, same sequence.
• Trim last: after walls are fully dry, tape the finished walls and paint baseboards, casings, and doors.
• Remove painter’s tape while paint is slightly tacky, pulling at 45°.
• Inspect in raking light (a work light held at an angle) for misses, drips, and holidays; touch up while paint is still workable.

Phase 5: Cleanup and Aftercare

• Seal leftover cans fully (tap around the rim), label with room, color code, and date; store upright at room temperature.
• Clean latex tools with soap and water promptly; don’t pour wash water with heavy paint solids into storm drains.
• Dry out unusable leftover latex with cat litter or hardener before disposal; take oil paint and solvents to household hazardous waste collection.
• Wait 24 hours before moving furniture back carefully; hang pictures after 24–48 hours.
• No scrubbing or washing walls for 2–4 weeks — paint needs the full cure to reach rated hardness.
• Keep the color formulas and receipts filed; they’re your touch-up kit for the next few years.

Quick Pre-Start Verification

Run through this the morning you start. If any answer is no, fix it before opening a can:

1. Do I have every gallon, quart, and supply on the list — no planned store trips mid-job?
2. Are all gallons of each color boxed (mixed together)?
3. Is every repair filled, sanded, and spot-primed?
4. Is the room ventilated and within the temperature range on the can?
5. Do I know the recoat time for this exact product?
6. Pre-1978 home: has old paint been tested or left undisturbed?
7. Is there a full day blocked for this room, not half of one?

Related Guides

• Complete Guide — the estimating method behind the quantities.
• Pro Tips — technique for every phase above.
• Cost Guide — pricing the shopping list.
• Common Mistakes — what this checklist prevents.
• Code Compliance — lead paint, VOCs, and disposal.
• How to Estimate — the measuring behind Phase 1.

Get Your Estimate

Print this page, work it top to bottom, and the project runs itself. Start at the top with quantities from the Interior Paint Calculator — everything downstream depends on buying right the first time.

Disclaimer: Calculator results are planning estimates based on the dimensions and coverage rates you enter. Actual paint requirements vary with surface texture, porosity, color change, and application method. Drying and recoat times vary by product, temperature, and humidity — always follow the manufacturer’s data sheet. Homes built before 1978 may contain lead paint — follow EPA RRP rules and local regulations for disturbance and disposal, and verify local VOC limits and paint-waste disposal rules before you start.