Square Footage Calculator
Calculate square footage of one or many rooms in feet, inches, yards, or meters. Includes flooring cost, waste allowance, and paint coverage estimates.
LIFESTYLECalculate the square footage of one or more rooms in feet, inches, yards, or meters. Add as many rooms as you need for a whole-house total, plus instant material estimates for flooring (with waste allowance), paint coverage, and flooring cost.
For each room, enter a name, length, and width in your chosen units. The calculator converts everything to feet, computes individual room sqft, and produces a total in sq ft, sq m, and sq yards. Materials estimates: flooring with adjustable waste % (10% straight, 15-20% diagonal), flooring cost at your $/sqft input, and paint gallons for one or two coats at 350 sq ft per gallon (configurable).
Square Footage Calculator
Calculate the square footage of one or more rooms in feet, inches, yards, or meters. Add multiple rooms for a whole-house total, and get instant material estimates for flooring, carpet, and paint.
Rooms
By Room
| Room | Dimensions | Sq Ft |
|---|---|---|
| Living Room | 18 × 14 ft | 252 |
| Kitchen | 12 × 10 ft | 120 |
| Master Bedroom | 14 × 13 ft | 182 |
Material Estimates
Tips for Accurate Measurements
Use a long tape measure (25 ft+) and round each dimension to the nearest inch. For irregular rooms, break them into rectangles - measure each rectangular section separately and sum the results. For L-shaped rooms, two rectangles is usually enough.
Always add a waste allowance when buying flooring or carpet: 10% for straight rectangular rooms, 15% for diagonal patterns or non-square rooms, and 20% for herringbone or chevron patterns. Subtract permanent fixtures (kitchen islands, built-in cabinetry) larger than ~10 sq ft.
Note that real-estate listings report "heated square footage" or "gross square footage" using exterior wall measurements, which adds 5-8% to interior usable space. The number you calculate here is interior usable square footage - the right number for flooring, paint, and furnishing.
Estimate only. Always re-measure twice before ordering materials. Flooring and paint prices vary by region, brand, and season.