Interior Design Calculators
Square footage, wallpaper, curtains, rug size, lighting, TV size, chandeliers, dining tables, art hanging, countertops, furniture fit and interior budgets.
- Chandelier Size CalculatorSize a chandelier for any room: diameter from room dimensions, fixture height from ceiling height and hanging height over a table.
- Countertop CalculatorCalculate countertop area for runs, islands and backsplash, plus the minimum number of quartz or granite slabs.
- Curtain Fabric CalculatorCalculate curtain fabric yardage, number of widths and rod length from window size, fullness, drop and pattern repeat.
- Dining Table Size CalculatorFind the right dining table size for 2–20 people, rectangular, round or square, and the minimum room size with clearances.
- Furniture Fit CalculatorCheck whether a bed, sofa or sectional fits your room with comfortable walkway clearances.
- Golden Ratio & 60-30-10 CalculatorUse the golden ratio (1.618) to size furniture and décor, and split colours with the 60-30-10 rule.
- Interior Design Cost CalculatorEstimate the cost of home interiors by carpet area and finish level, with modular kitchen, wardrobes and designer fee.
- Room Lighting (Lumens) CalculatorCalculate how many lumens and bulbs a room needs from its size and type (living room, kitchen, bedroom, office…).
- Picture Hanging Height CalculatorFind exactly where to put the nail to hang art at the 57-inch gallery standard or above a sofa or console.
- Rug Size CalculatorFind the right rug size for a living room, bedroom or dining room from the room size and furniture layout.
- Square Footage & Flooring CalculatorCalculate the square footage of rectangular, L-shaped, round or triangular rooms and how much flooring to buy with waste.
- TV Size & Viewing Distance CalculatorFind the best TV size for your viewing distance (or the best distance for your TV) using SMPTE 30° and THX 40° guidelines.
- Wall Art Size CalculatorFind the right artwork width for the furniture below it (⅔–¾ rule) and split it across multiple pieces with gaps.
- Wallpaper CalculatorCalculate wallpaper rolls from wall width, height, roll size (US, Euro, wide) and pattern repeat. Free and accurate.