Projetos de Interior

Calculadora de Custo de Pintura

Quanto custa pintar um cômodo? Calcule o custo exato de materiais (latas de tinta) e serviço de pintor profissional por metro quadrado.

⚡ Quick Dimensional Presets:

Medidas do Projeto

Digite as dimensões para calcular os materiais necessários

Room Length(ft)

Longest wall measurement

Room Width(ft)

Shortest wall measurement

Wall Height(ft)

Standard residential ceiling is 8 or 9 ft

Number of Doors(doors)

Standard doors deduct ~20 sq ft (1.86 m²)

Number of Windows(windows)

Standard windows deduct ~15 sq ft (1.39 m²)

Number of Coats

Two coats provide maximum durability and true color depth

Paint Coverage per Unit(sq ft/gal)

Standard interior latex covers 350–400 sq ft/gal

Paint Price per Unit($/gal)

Budget: $25–$35 | Premium: $45–$70 per gallon

Labor Cost (Optional)($/sq ft)

Set to 0 for DIY. Pro rates average $1.50–$3.50/sq ft

Waste & Roller Buffer

Accounts for roller nap retention, cutting, and touch-ups

Currency Symbol

Select preferred currency for cost output

2D DRAFTING PLAN14 FT × 12 FT (168 SQ FT)

Insira as medidas acima para visualizar os resultados.

Exemplo Passo a Passo

Cenário: Estimating material and professional labor cost for a 14 ft × 12 ft primary bedroom with 8 ft ceilings, 1 entry door, 2 windows, 2 coats of premium paint at $45/gal, and $1.75/sq ft professional painter labor rate.

Calculate Perimeter: 2 × (14 + 12) = 52 linear feet.

Calculate Gross Wall Area: 52 ft × 8 ft = 416 sq ft.

Subtract Openings: 416 - (1 door × 20 sq ft + 2 windows × 15 sq ft) = 416 - 50 = 366 sq ft.

Factor 2 Coats: 366 sq ft × 2 = 732 sq ft total paintable coverage.

Compute Gallons with 10% Buffer: (732 / 350) × 1.10 = 2.09 × 1.10 = 2.30 gallons -> Purchase 3 full 1-gallon cans.

Calculate Material Cost: 3 cans × $45.00 = $135.00.

Calculate Labor Cost: 366 sq ft net wall area × $1.75/sq ft = $640.50.

Calculate Total Project Cost: $135.00 + $640.50 = $775.50.

Result: Total project estimate is $775.50 ($135.00 for 3 cans of paint + $640.50 professional labor).

Paint Cost & Budgeting Formula

Total Cost = (Full Cans × Paint Price) + (Net Paintable Area × Labor Rate)

Gross wall area is computed from perimeter multiplied by ceiling height. Standard deductions are subtracted for doors (20 sq ft / 1.86 m²) and windows (15 sq ft / 1.39 m²). The net paint area is multiplied by coats and divided by the coverage rate. Adding a waste buffer (default 10%) determines total paint volume, which rounds up to whole retail cans. Total cost combines material purchase price with optional professional square-foot labor fees.

Variáveis da Fórmula

G — Gross Wall Area = 2 × (Length + Width) × Height

D — Total Openings Deduction = (Doors × 20) + (Windows × 15)

A_{net} — Net Wall Area = Gross Area - Openings Deduction

A_{adj} — Adjusted Paint Area = Net Wall Area × Number of Coats

V — Total Paint Volume = (Adjusted Area / Coverage) × (1 + Waste%)

C_{paint} — Paint Material Cost = ⌈Total Volume⌉ × Price per Can

C_{labor} — Professional Labor Cost = Net Wall Area × Labor Rate

Premissas de Cálculo

Standard residential interior door deductions are 20 sq ft (1.86 m²) per door.
Standard residential interior window deductions are 15 sq ft (1.39 m²) per window.
Standard interior latex paint provides 350 to 400 sq ft (8.6 to 9.8 m²) of single-coat coverage per gallon.
Professional interior painting labor averages $1.50 to $3.50 per square foot of wall area based on PCA benchmarks.
A 10% safety buffer is included to account for roller nap retention, cutting waste, and leftover touch-up reserve.

Trade FAQ

Perguntas Frequentes

Dúvidas comuns sobre reformas e materiaisCalculadora de Custo de Pintura

How much does it cost to paint a 10x12 or 12x14 bedroom?

For DIY painting, a 10x12 or 12x14 room typically costs between $60 and $150 for 2 to 3 gallons of quality paint and basic supplies (tape, roller covers, drop cloths). Hiring a professional painter usually costs between $400 and $900 including labor, wall prep, and materials.

How much do professional painters charge per square foot?

Professional interior painters typically charge between $1.50 and $3.50 per square foot of wall surface area. High ceilings, extensive drywall repair, trim/crown molding, and dark-to-light color transitions will push rates toward the higher end of the range.

How much paint does a standard room require?

A standard 10x12 or 12x14 bedroom with 8-foot ceilings has approximately 350 to 420 square feet of net wall area. Applying 2 full coats requires between 2 and 3 gallons of interior paint.

What is the difference in cost between budget and premium paint?

Budget paint ranges from $20 to $30 per gallon, standard mid-grade paint costs $35 to $50, and premium zero-VOC washable paint (such as Sherwin-Williams Emerald or Benjamin Moore Regal Select) costs $65 to $90+ per gallon. Premium paints cover better, clean easier, and often eliminate the need for an extra coat.

Do I need primer, and how does it affect total cost?

Primer is recommended when painting bare drywall, covering water/smoke stains, transitioning from oil to latex, or making drastic color shifts (e.g., navy to off-white). A gallon of dedicated PVA or stain-blocking primer costs $20 to $35 and reduces the amount of expensive topcoat paint required.

Why should I include a 10% waste buffer in my paint budget?

Paint rollers and brushes absorb a significant volume of liquid during application. A 10% buffer prevents running out of paint on the final wall section and ensures you have identical-batch leftover paint for future scuff and scratch touch-ups.

How can I lower the cost of hiring a professional painter?

You can save 15% to 30% on labor costs by handling preparation yourself: moving furniture to the room center, removing switch plates and outlet covers, wiping down dirty baseboards, and patching small nail holes before the painters arrive.

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