Saltar al contenido
AJ PAINT
EN

Calculadora de pintura

Cuánta pintura, y de dónde sale ese número.

Cuarto por cuarto, con la textura de tus paredes y las puertas y ventanas descontadas. Lo importante no es el total: es que puedes abrir la cuenta y revisar cada paso a mano. Nada se envía a ningún servidor y tu estimado sobrevive si recargas la página.

Todo el trabajo

El retoque agrega 5 por ciento, que es la reserva que da estimating.ts. Ese bote sobrante es la pintura que todavía va a coincidir con tu pared en dos años.

Sugerido a partir del perímetro. La corona recorre el perímetro en el techo igual que el rodapié lo recorre en el piso, así que un cuarto con ambos tiene el doble de perímetro. Los marcos se suman por abertura — mídelos si pesan.

Cómo se calculó esto

Escribe largo, ancho y altura y aquí aparece la aritmética.

Qué comprar

Pon largo, ancho y altura en el cuarto de arriba y los números aparecen aquí.

Por qué 350 pies cuadrados por galón y no 400
We plan at 350 square feet per gallon, one coat, on smooth sealed drywall. The can usually says 350 to 400. We use the bottom of that range, and here is the arithmetic for why. Theoretical coverage = 1604 x volume solids / dry film thickness in mils. The 1604 constant is pure unit conversion - a US gallon is 231 cubic inches, spread out one mil thick. Run a real product through it: Sherwin-Williams SuperPaint Interior Latex Flat is 43 percent volume solids at 1.6 mils dry, so 1604 x 0.43 / 1.6 = 431 square feet per gallon theoretical. The label on that same can says 350 to 400. That gap of roughly 7 to 19 percent is the manufacturer's own built-in application allowance, before a single real-world loss. Then add what stays in the tray, on the roller cover, in the brush and in the can. Add cutting in, which eats paint out of proportion to the area it covers. Add any porosity at all, and add the fact that texture presents more actual surface than a tape measure reports. Field data runs 10 to 20 percent under manufacturer claims. So 400 is the best case on a technical data sheet and 350 is the realistic case on a job. A calculator that starts at 400 sends you back to the store mid-wall.
Por qué una puerta cuenta como 20 pies cuadrados
We count a standard door at 20 square feet and a standard window at 15. On the door: a full 3 foot by 7 foot door computes to exactly 21 square feet, but that is not the most common door in an American house. Most US interior doors are 30 to 32 inches wide by 80 inches tall, which is 16.7 to 17.8 square feet, and a 3 foot by 6 foot 8 inch door is 20. So 20 is the honest default; use 21 only if the doors really are a full 3 by 7. On the window: 15 square feet is a defensible middle. A 3 by 4 window is 12 square feet, a 3 by 5 is 15, a 4 by 5 is 20. Real windows vary too much for any single number to be right, so treat it as a planning figure and measure the big ones. Three rules go with these numbers. First, deduct nothing under about 3 square feet - it falls inside the normal waste allowance. Second, always fully deduct the large stuff: fireplaces, wall-to-wall built-ins, passthroughs, sliding glass doors, and anything over roughly 30 to 40 square feet. Third, and this is the one most calculators get wrong: deduct openings for material, not for labor. An opening removes 20 square feet of fast open rolling and adds perimeter cut-in, masking and detail work that is slower per square foot than open wall. Deducting it from a labor estimate makes the estimate worse, not better. A real estimator computes material with deductions and labor without them.
Cómo funciona la cuenta de las molduras
One quart covers roughly 100 to 150 linear feet of standard trim per coat, and 125 is the working midpoint. Quarts = total linear feet x coats / 125. A gallon runs about 400 to 600 linear feet at two coats. A typical three-bedroom house has 500 to 800 linear feet of trim all in, which comes out to 1 to 1.5 gallons for two coats, or about a quart per average room. Crown moulding is not a special case: it runs the full perimeter at the ceiling exactly the way baseboard runs it at the floor, so a room with both simply has twice the perimeter. Add casings by the opening. One caveat that matters: 125 assumes standard profiles, roughly 3 to 4 inch baseboard and 2 to 3 inch casing. Tall 5 to 7 inch base, built-up multi-piece crown and deep ornate profiles can easily double consumption. Multipliers of 1.0 / 1.4 / 1.8 for standard / tall / ornate are a reasonable way to handle that, but those multipliers are our own inference rather than a published figure, and we are labelling them as such.

Deduct openings first, then multiply by the number of coats, then round up - in that order. And round up to what you can actually buy. Paint is sold in gallons and quarts, not in decimals, so 2.14 gallons means three gallons. Running short on a color-matched job mid-wall is a much worse outcome than a leftover can, and the leftover can is the touch-up paint you will want in two years anyway.

Order all of a color at once and box it - combine every gallon into one container and mix before any of it goes on a wall. Batch-to-batch color variation is small but it is visible on a large plane in raking light, and it is unfixable after the fact. Standard practice on any job over a couple of gallons.

A "how many coats" dropdown is the wrong question. Ask about the color change instead, because the two directions are not symmetric. Dark over light is a base-chemistry problem: deep and ultra-deep bases carry far less titanium dioxide to make room for colorant, so reds, deep yellows, oranges and some deep blues routinely need three or more coats. The fix is a grey-tinted primer stepped toward the topcoat. Light over dark is a hiding-power problem against a dark substrate, and it needs a white or tinted primer coat or three coats of topcoat. Like over like on a sound repaint is genuinely one to two coats, and sometimes one is the honest answer.

Primer coverage does not follow paint coverage, because a primer is a sealer rather than a film-builder. PVA runs about 19 percent volume solids against 43 percent for a premium wall paint, and at the same 4.0 mils wet it leaves half the dry film. It is doing a different job. This is also why primer gets its own coverage table on this page instead of a percentage applied to the paint number. Plan primer volume at roughly 0.8 to 1.2 times the topcoat volume, plus 5 to 10 percent.

Compute material with opening deductions and labor without them. A door removes 20 square feet of fast rolling and adds cut-in, masking and detail work that is slower per square foot than open wall. Many working estimators do not deduct openings at all on small residential jobs, because not deducting builds in roughly the same 10 to 15 percent overage you would add anyway and it removes the risk of running short on a custom color mid-wall. Vertigraph offers a clean simplification for homeowner-facing math: subtract a flat 10 percent for openings in typical residential.

A painting estimate is a labor estimate with some paint in it. Regional cost data puts labor at 75 to 95 percent of the total, and names surface condition as the most important single cost driver: walls that need patching, sanding and priming cost significantly more than walls that do not. Any square-foot price that ignores condition will mislead. Every number on this page is a material planning tool, not a quote - the quote comes from walking the actual house.

Cómo usarla bien

  1. 1

    Mide el cuarto

    Largo y ancho en pies, y la altura del techo. Mide la habitación, no los muebles. Si el cuarto tiene forma de L, trátalo como dos rectángulos y súmalos.

  2. 2

    Cuenta puertas y ventanas

    Solo las que están en las paredes que vas a pintar. No descuentes nada de menos de tres pies cuadrados; eso cae dentro del desperdicio normal.

  3. 3

    Elige la textura

    Esta es la entrada que más mueve el resultado. En el sur de California, la mayoría de las casas de tract son cáscara de naranja o knockdown, no panel liso.

  4. 4

    Revisa la aritmética

    Abre "cómo se calculó esto" en cada cuarto. Cada paso está impreso con sus números. Si algo no te cuadra, cámbialo.

La cadena completa, en una línea

Perímetro por altura del techo, menos las aberturas, entre los pies cuadrados por galón de tu textura, por el número de manos, por uno más el factor de desperdicio. Ese es todo el cálculo del color en las paredes. El techo corre por separado con su propia textura, el primer corre a un ritmo distinto porque un sellador no es una pintura, y las molduras se cuentan en pies lineales, no en pies cuadrados.

Las constantes: 350 pies cuadrados por galón en panel liso, 20 pies cuadrados por puerta, 15 por ventana, 125 pies lineales de moldura por cuarto de galón por mano, y 10 por ciento de desperdicio base — quince por ciento en cuanto la superficie tiene textura.

El orden importa

Descuenta las aberturas primero, luego multiplica por las manos, luego redondea — en ese orden. Y redondea a lo que de verdad puedes comprar. La pintura se vende en galones y en cuartos, no en decimales, así que 2.14 galones son tres galones.

Esta calculadora redondea una sola vez, en el total del proyecto, no cuarto por cuarto. Esa es la razón: vas a pedir todo el color de una vez y lo vas a mezclar junto. Si tus cuartos llevan colores distintos, redondea cada color por separado.

La pregunta equivocada es "cuántas manos"

La pregunta correcta es qué tan grande es el cambio de color, porque las dos direcciones no son simétricas. Oscuro sobre claro es un problema de química de base: las bases profundas llevan muy poco dióxido de titanio para dejarle lugar al colorante, así que los rojos, amarillos profundos y naranjas fácilmente piden tres manos o más. Claro sobre oscuro es un problema de poder de cubrimiento contra un fondo oscuro.

La solución en los dos casos es la misma y es barata: un primer gris entintado hacia el color final. Una mano de primer entintado cuesta menos que una tercera mano de pintura premium de base profunda. Está en la lista de primers de arriba.

¿Prefieres que alguien lo mida?

Un estimado de material no es un presupuesto. Juan camina la casa, revisa la condición de las paredes y te entrega el alcance por escrito, sin costo.

(760) 809-0025Presupuesto gratis
Llamar a Juan Mensaje