Home Decor & Renovation Calculators

15 architectural precision tools that run 100% locally in your browser. No registration, no API delays, and free forever. Designed for homeowners, interior designers, and contractors.

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1. Paint Calculator

Work out exactly how many litres or gallons of paint you need. Enter room size, doors, windows, and coats. Subtracts openings automatically with ceiling support.

Use it for: bedrooms, living rooms, kitchens, any wall repaint project.
Open Paint Calculator →
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2. Wallpaper Calculator

Find out how many rolls of wallpaper to order. Factors in total wall width, height, pattern repeats, and strip calculations with safety wastage allowances.

Use it for: feature walls, full-room wallpapering, drop-match designs.
Open Wallpaper Calculator →
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3. Tile & Flooring Calculator

Calculate the exact number of tiles and boxes needed for floors and walls. Includes custom wastage allowances for straight, diagonal, or herringbone layouts.

Use it for: bathroom and kitchen tiling, living room flooring, ceramic tiles.
Open Tile & Flooring Calculator →
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4. Curtain Size Calculator

Get the right rod length, curtain width, finished length and fabric quantity for any window. Choose sill, apron or floor length with custom fullness gathering.

Use it for: living rooms, bedrooms, kitchens, sliding glass doors.
Open Curtain Size Calculator →
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5. Rug Size Guide

Find the ideal rug size for living rooms, dining tables or beds. Recommends layout proportions using interior designer rules and matches nearest store sizes.

Use it for: seating areas, 4-8 seat dining tables, Queen & King beds.
Open Rug Size Guide →
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6. 60-30-10 Color Palette

Turn one colour you love into a full room palette. Generates a balanced 60% dominant, 30% secondary, and 10% accent palette with click-to-copy hex swatches.

Use it for: wall colours, furniture fabrics, moodboard color harmony.
Open Color Palette Generator →
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7. Room Lighting (Lumens)

Calculate exact lumens, LED watts, and bulb distribution required for comfortable visibility and task work across living rooms, kitchens, bedrooms, and home offices.

Use it for: ceiling downlights, kitchen task lighting & ambient layers.
Open Lighting Calculator →
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8. TV Size & Distance

Determine the optimal 4K television diagonal for your sofa seating distance using SMPTE 30° everyday viewing angles and THX 40° cinematic immersion standards.

Use it for: home theaters, living room setups & ergonomic eye-level heights.
Open TV Size Calculator →
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9. Ceiling Fan Sizing

Find the ideal fan blade span (inches) and downrod suspension length for your room's square footage and ceiling height to maximize quiet airflow circulation.

Use it for: bedroom fans, open lounges, tall ceilings & flush mounts.
Open Ceiling Fan Calculator →
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10. AC Tonnage & BTU Sizing

Calculate exact BTU/hr heat loads and recommended air conditioner tonnage based on floor dimensions, ceiling height, sunlight exposure, and room occupants.

Use it for: master bedrooms, living rooms, inverter AC capacity planning.
Open AC Tonnage Calculator →
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11. Kitchen Backsplash Tile

Calculate exact square footage, 12x12 inch mesh sheets, and carton boxes required for countertop backsplashes and range hood accent wall areas.

Use it for: kitchen countertops, mosaic mesh tiles, subway tile splashbacks.
Open Backsplash Calculator →
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12. Gallery Wall Spacing

Calculate exact nail hanging centers, symmetrical side margins, and uniform designer gaps for 2 to 6 picture frames based on the 57-inch museum eye-level rule.

Use it for: photo frames above sofas, console tables, hallway art arrangements.
Open Gallery Wall Calculator →
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13. Wood Planks & Cost

Determine exact carton boxes to order, staggered plank cutting wastage, expansion perimeter clearances, and total material budget for hardwood and LVP.

Use it for: solid hardwood, laminate floors, luxury vinyl plank (LVP).
Open Wood Plank Estimator →
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14. Brick & Patio Pavers

Calculate total bricks, pavers, or thin-brick veneer units needed for interior accent walls or garden patios, including bags of mortar mix required.

Use it for: exposed brick feature walls, patio pavers, garden walkways.
Open Brick & Paver Calculator →
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15. Interior Unit Converter

Instantly convert between metric and imperial dimensions for floor areas, room lengths, fabric roll widths, and liquid paint volumes with high precision.

Use it for: sq ft to sq m, feet to metres, litres to gallons conversions.
Open Unit Converter →