Buying paint is one of those jobs where the two common mistakes cost about the same and annoy you in opposite ways. Buy too little and you stop mid-wall, hunting for a color match at 7 PM on a Sunday. Buy too much and you carry half-used cans down five flights of stairs, then store them in a closet that was already full.
The calculator above gives you gallons based on your room dimensions, the surfaces you want to paint and the number of coats. This page explains the arithmetic, shows a worked example with real numbers, and covers the things a calculator cannot judge: the condition of NYC plaster, ceiling heights in pre-war buildings, and what building rules and older paint mean for the job. If you decide you would rather hand it off, the cost ranges here are 2026 planning ranges, and a written, itemized quote governs the real price.
The formula behind every paint calculator is simple. Here is how to do it by hand so you can check any number.
Do the ceiling separately. Its area is length times width, multiplied by the number of coats and divided by the can's coverage. Trim, doors, baseboards and window casings are better estimated by linear feet and the product's coverage, but in practice a gallon of trim paint covers a surprising amount of molding in a typical apartment.
Consider a bedroom that measures 12 by 14 feet with 9-foot ceilings, one door and two windows.
| Step | Calculation | Result |
|---|---|---|
| Perimeter | 12 + 14 + 12 + 14 | 52 ft |
| Gross wall area | 52 x 9 | 468 sq ft |
| Openings | One door (about 21 sq ft) plus two windows (about 15 sq ft each) | About 51 sq ft |
| Net wall area | 468 - 51 | 417 sq ft |
| Two coats | 417 x 2 | 834 sq ft |
| Gallons at 350 sq ft/gal | 834 / 350 | About 2.4 gallons |
| Gallons at 400 sq ft/gal | 834 / 400 | About 2.1 gallons |
| Ceiling, two coats | 12 x 14 x 2 = 336 sq ft | About 1 gallon |
The takeaway: you need about 3 gallons of wall paint and 1 gallon of ceiling paint, plus a smaller amount of trim paint. If your plaster is porous or recently patched, your walls will drink more, which is why rounding up is the right instinct. Paint stores often sell gallons in a slightly different volume per container for premium lines, so check the label.
Not every surface in an apartment wants the same product. Mixing them up is a common reason a paint job looks worse than it should.
Investing in a higher-quality paint from a reputable line usually means better hiding and durability, and sometimes fewer coats. That does not mean the most expensive can is right for every surface. Match the product to the surface and the room.
A paint calculator makes painting feel like a purchase. It is really a process, and the process is where the finished look is won or lost. The paint is the cheapest part of a good paint job. Preparation, tools, technique and cleanup are what you are really paying a professional for.
Consider what a first-time painter faces in an NYC apartment. Ceilings are often 9 or 10 feet and require scaffolding or tall ladders. Plaster walls carry decades of patches, hairline cracks and uneven texture. Radiators and pipes make cutting-in awkward. Trim is layered with old oil paint that does not accept latex without the right primer. And if the building predates 1978, paint can contain lead, which changes how sanding and scraping must be done.
That last point is more than a technicality. Anyone paid to disturb paint in pre-1978 homes must be certified under EPA's lead rule and use lead-safe work practices. If you hire a firm, ask about it. If you are a landlord, it applies to your contractor.
N.Y. Renovation Services treats interior painting as a core trade. Our crews protect floors and furniture, patch and sand surfaces, prime where needed, cut in cleanly and finish with the right sheen for each surface. As an in-house design-and-build firm, we also coordinate painting with plaster repair, tile and flooring so you do not end up with fresh paint scuffed by the next trade. Contracts are itemized, with no hidden fees; we are licensed and insured; and we donate 5% of the total project cost to a nonprofit of your choice.
Painters often say that most of a good job is preparation, and the claim holds up. Here is what prep includes.
Kitchens and bathrooms collect grease and soap residue that paint does not bond to. Wash walls where needed and let them dry.
Fill nail holes, hairline cracks and dings with the right compound, let it cure, then sand smooth. In plaster apartments, larger cracks may need mesh tape and multiple coats of compound. If surfaces are badly uneven, skim coating adds roughly $2 to $5 per square foot in 2026 planning ranges but makes a dramatic difference to the finished look.
Primer is not optional on bare plaster, fresh patches, stained areas and dramatic color changes. Stain-blocking primer is the answer for water marks and smoke stains. Primer also affects how many gallons you need, so factor it in.
Floors, radiators, outlets, fixtures and windows need tape or cover. Time spent here prevents drips and smears that cost more to fix than the prep took.
If paint is peeling in a bathroom, the problem is usually moisture, not paint. Fix the ventilation and any leaks first. The EPA has general information about mold and moisture if you see growth. If a bathroom or ceiling keeps peeling, ask a professional to find the moisture source before repainting, because paint alone will not hold.
If you add up your time, tools, supplies, ladders and mistakes, professional painting often looks more reasonable than it first appears. These are typical planning ranges for NYC apartments in 2026, covering walls, ceilings and trim with prep included.
| Apartment size | Typical planning range |
|---|---|
| Studio | About $1,500 to $3,000 |
| One-bedroom | About $2,500 to $5,000 |
| Two-bedroom | About $4,000 to $8,000 |
| Three-bedroom | About $6,000 to $12,000 |
Skim coating adds roughly $2 to $5 per square foot. Kitchen cabinet painting typically runs about $3,500 to $9,000. These are ranges, not quotes. Building rules, access, ceiling height, condition of surfaces and finishes move prices, and a written, itemized quote governs the real number.
N.Y. Renovation Services can price your apartment from a walk-through if you want a firm number instead of a range. For a full breakdown of what drives painting prices, preparation steps and how to choose a pro, read our interior painting guide for NYC. If you plan to paint the outside of a house, our exterior painting guide covers scaffolding, surface prep and weather windows.
Painting rarely needs a Department of Buildings permit, but that does not mean it is unregulated. Co-op, condo and landlord rules still apply, including work hours, insurance requirements and sometimes approved products. NYC's Noise Code generally limits construction to weekdays from about 7 AM to 6 PM unless an after-hours variance is approved, and many co-ops and condos restrict work to about 9 AM to 5 PM on weekdays only. If your project is part of a larger renovation, our Do I Need a Permit page explains what triggers a filing.
For rental owners, New York City's Housing Maintenance Code requires owners of multiple dwellings to repaint apartments, walls and ceilings, every three years and between tenancies. The Department of Housing Preservation and Development explains obligations on its HPD site. Landlords usually find that a single crew, a consistent paint schedule and bulk planning reduce per-unit cost.
Safety is part of painting. Lead paint is the main concern in pre-1978 homes, and the EPA's Renovation, Repair and Painting rule requires lead-safe work practices from certified renovators. Ventilate rooms when painting, keep children and pets away from work areas, and use low-odor products where possible.
A professional crew typically finishes interior painting for a one- to three-bedroom apartment in about 2 to 7 working days. The schedule depends on size, prep and the number of coats.
A typical sequence is:
If you are renovating other rooms, paint timing matters. Painting before flooring risks drips; painting after flooring risks scuffs. In most full renovations, the final coat goes on after tile, flooring and cabinets are installed, with a protective layer on finished surfaces. The renovation timeline planner shows how to order the trades. For planning at a broader level, consult our NYC renovation cost guide.
Painting conditions differ across the city. Here is a sampling of where we work.
| Area | ZIP codes | Painting considerations |
|---|---|---|
| Upper West Side, Manhattan | 10023, 10024, 10025 | Pre-war co-ops with plaster walls, high ceilings and strict house rules |
| Gramercy, Manhattan | 10010, 10003 | Pre-war co-ops, townhouses and historic district buildings |
| Park Slope, Brooklyn | 11215, 11217 | Brownstones with plaster, pocket doors and tall ceilings |
| Astoria, Queens | 11102, 11103, 11105, 11106 | Attached brick row houses and pre-war walk-ups |
| Forest Hills, Queens | 11375 | Tudor homes and pre-war co-ops |
| Todt Hill, Staten Island | 10304 | Large estates and hillside homes with high ceilings |
| Jersey City, New Jersey | 07302, 07304, 07305, 07306, 07307, 07310 | Downtown high-rise condos and Heights row houses |
Brownstones and pre-war apartments are the paint-heavy projects: tall ceilings, lots of trim, layers of old paint. Houses on Staten Island and Long Island may involve large rooms and open stairwells that need scaffolding or tall ladders. High-rise condos have fewer surprises on the walls but stricter schedules. Explore our regional pages for Manhattan, Brooklyn, Queens, Staten Island and Long Island.
If your calculator number has you thinking you would rather not do this yourself, here is the alternative. We schedule a visit, walk each room and note ceiling heights, wall condition, trim, radiators and access. We look at what needs patching or skim coating, and whether your building predates 1978 and requires lead-safe practices. We then price the job in a written, itemized estimate that shows prep, paint, labor and any extras separately.
During the job, we protect your floors and furniture, keep your building's rules, and clean up daily. We use the right product for each surface and finish with a final walk-through. If we find a hidden issue, such as moisture damage behind a wall, we show you, explain your options and price the change in writing.
You may want painting to be part of something bigger. We offer full gut renovation for owners redoing an apartment from the studs, and our bathroom and kitchen teams handle the finishes that follow. N.Y. Renovation Services is fully licensed and insured, and we donate 5% of the total project cost to a nonprofit of your choice.
Here is a simple way to move forward.
The N.Y. Renovation Services office at 1 Teleport Dr, Staten Island, is open Monday through Saturday from 8:00 AM to 5:00 PM. You can also use our contact page, and we serve all five boroughs, Long Island and nearby New Jersey.