Painting calculators.
Separate surfaces, coats and container sizes. Use coverage for the selected product and the surface you actually intend to paint.
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Room Surface Area Calculator
Measure walls and ceiling, subtract openings, and keep the surfaces separate.
Open calculatorPaintingPaint Calculator
Estimate paint containers from measured area, coats and the coverage on your product label. See required paint and purchased surplus.
Open calculatorPaintingExterior Paint Calculator
Combine rectangular facades and triangular gables, then calculate paint containers.
Open calculatorPaintingWallpaper Rolls Calculator
Count full-height wallpaper drops with pattern repeat, trim and matching allowance.
Open calculatorPaintingSeparate Paint Product Order Calculator
Order distinct finishes or colors separately instead of pooling their incompatible coverage and container sizes.
Open calculatorPaintingMixed Paint Container Purchase Calculator
Find the lowest stated purchase cost using two compatible container sizes for the same coating.
Open calculatorPaintingHalf-Drop Wallpaper Cut Calculator
Compare alternating wallpaper drop phases with a half-repeat offset and count fixed-length roll pairs.
Open calculatorPaintingMasking Tape Run Calculator
Count tape rolls from measured edges, repeated masking passes and separate edge groups.
Open calculatorPaintingFurniture Panel Finish Surface Calculator
Total selected panel faces and edges for finishing furniture from actual dimensions and exposed-side counts.
Open calculatorPaintingMixed Height Wallpaper Roll Allocation Calculator
Allocate straight-match wallpaper drops of different heights to rolls after repeat rounding and initial alignment loss.
Open calculatorPaintingPaintable Trim Profile Surface Calculator
Estimate finish area from the developed exposed profile width, run lengths and separately measured end faces.
Open calculatorPaintingSpecified Coating Film Volume Calculator
Translate a supplied ordinary decorative coating dry-film thickness and volume solids into theoretical wet coating volume.
Open calculatorPaintingOpening Reveal Finish Area Calculator
Count the exposed jamb, head and sill surfaces separately from the flat wall face around openings.
Open calculatorPaintingSingle Slope Room Surface Calculator
Measure wall and ceiling areas in a rectangular room with two different specified side-wall heights.
Open calculatorPaintingSpecified Coffered Ceiling Finish Calculator
Separate visible flat ceiling area and recessed vertical returns for a supplied decorative coffer grid.
Open calculatorPaintingSpecified Gable Wall Surface Calculator
Measure a rectangular wall face plus its supplied triangular gable, with openings deducted once.
Open calculatorPaintingCoating Dilution Basis Calculator
Distinguish a percentage of original product from a percentage of final volume.
Open calculatorPaintingCentred Wallpaper Strip Layout Calculator
Compare centring a wallpaper strip with centring a seam before cutting drops.
Open calculatorPaintingAbrasive Sheets for Separate Work Zones Calculator
Count abrasive sheets from your observed usable area per sheet and passes, keeping partially used sheets in separate work zones.
Open calculatorPaintingRectangular Repair Patch Filler Cartridge Calculator
Add measured rectangular patch voids and convert wet fill volume to supplied cartridge yield. Does not approve a repair method.
Open calculatorPaintingRoller Sleeve Orders by Separate Finish Calculator
Budget consumable sleeves from a user-observed working area and keep incompatible finishes as separate packs.
Open calculatorPaintingFloor Protection Roll Cut Order Calculator
Cover measured rectangular work areas with continuous protective strips, explicit overlap and an optional supplied edge upturn.
Open calculatorPaintingConcentric Elliptical Frame Coating Quantity Calculator
Keep the visible face of a supplied elliptical frame separate from its central opening before ordering coating.
Open calculatorPaintingRegular Polygon Inset Frame Coating Calculator
Measure a uniformly inset face border of a supplied regular polygon using its apothem and existing border width.
Open calculatorPaintingAlternating Radius Star Face Coating Calculator
Measure a supplied simple star face with evenly alternating outer and inner radii before calculating coating containers.
Open calculatorPaintingCapsule Shaped Inset Border Coating Calculator
Deduct a concentric inset capsule from an outer capsule face while retaining the straight section and curved ends.
Open calculatorPaintingRounded Rectangle Inset Frame Coating Calculator
Measure a supplied rounded rectangle face border with a matching inset radius rather than subtracting unrelated rectangle areas.
Open calculatorPaintingAnnular Arc Face Band Coating Calculator
Measure only a supplied curved annular face band, excluding separate radial or straight border strips.
Open calculatorConnect these calculations
Measure and check your purchase assumptions
How to measure and order: figured frame and decorative face coating quantities
Which measurements and product data prevent quantity mistakes for this job?
Read guideguideEqual outer ellipse dimensions with different inner openings: quantity checks
Identical outside dimensions do not imply equal coated frame area. A smaller opening retains more face area and can change whole-container rounding.
Read guideguideHow to measure and order: surface preparation consumables
Which measurements and product data prevent quantity mistakes for this job?
Read guideguideSeparate abrasive zones versus one pooled working area: quantity checks
A partially used abrasive sheet may be stranded in one work zone. Pooling area assumes its remaining usable life can transfer to another zone.
Read guidecomparisonRead the denominator in a supplied dilution percentage
Does ten percent mean of original product or of final total?
Read guidecomparisonCompare a centred wallpaper seam with a centred strip
Does centring the pattern require one more full strip?
Read guideguideKeep per-coat paint coverage separate from completed-system coverage
Does the product coverage figure already include the specified coats?
Read guideguideInclude exposed panel edges in a furniture finish estimate
When does two-face panel area still omit a paintable surface?
Read guidecomparisonAllocate different wallpaper drop heights before buying rolls
Why can average wall height give the wrong straight-match roll count?
Read guideguideUse the exposed contour width for painted trim
Why can a moulding’s bounding face width understate its finish area?
Read guidecomparisonSeparate theoretical coating film volume from a purchase estimate
Can dry-film thickness replace a product coverage and container calculation?
Read guideguideAdd opening reveals separately from the wall face
Does subtracting a window or door face also account for its exposed returns?
Read guidecomparisonUse average height for walls but slope length for the ceiling
Why does a mean room height not determine a sloping ceiling area?
Read guidetroubleshootingCount visible coffer surfaces without doubling horizontal area
Why do recessed ceiling openings add return area rather than another full ceiling face?
Read guidecomparisonKeep a gable wall triangle separate from a sloping roof face
Why should a roof slope length not be used as gable wall height?
Read guideguideKeep paint colors and finishes as separate orders
Which coating quantities may be pooled before container rounding?
Read guideguideCompare mixed compatible container sizes
When can one large container plus small containers beat an all-large order?
Read guideguideTreat wall openings differently for paint and wallpaper
Why does subtracting opening area not automatically save full wallpaper drops?
Read guideguideUnderstand paired cuts for half-drop wallpaper
Why do alternating half-drop phases have different source cut lengths?
Read guideguideDistinguish masking passes from paint coats
How do repeated masking passes affect tape purchasing?
Read guide