Formula: Area = π × r²
Formula: Area = ½ × base × height
📐 Enter the two rectangles that make up your L-shaped room. The total area will be their sum.
Add multiple rooms and get a grand total. Useful for whole-house flooring projects.
Square footage (sq ft) is the most common unit for measuring area in the US. It's used for rooms, houses, yards, and any other two-dimensional space.
Results are always shown in square feet plus the equivalent in other common units:
When ordering flooring, tile, or carpet, always add extra for cuts, waste, and future repairs. Industry standard recommendations:
Your master bedroom is 14 ft × 16 ft = 224 sq ft. You want hardwood flooring installed in a straight pattern. Add 10% waste: 224 × 1.10 = 246.4 sq ft to order (round up to 250). At $4.50/sq ft for the material: 250 × $4.50 = $1,125 in flooring material. Installation labour in Canada typically runs $2–4/sq ft, adding another $500–1,000 for total project cost of $1,625–2,125 installed.
To calculate paint needed for walls: measure wall height × room perimeter, then subtract door and window areas. A standard 10 ft × 12 ft room with 8 ft ceilings has approximately (10+12+10+12) × 8 = 352 sq ft of wall area, minus 2 doors (~40 sq ft) and 2 windows (~30 sq ft) = 282 sq ft to paint. One gallon covers ~350–400 sq ft, so one gallon covers this room in one coat. For two coats, buy 2 gallons. Textured surfaces or colour changes from dark to light require more.
Material costs per square foot: Luxury vinyl plank (LVP) $2–4; laminate $1.50–3.50; engineered hardwood $4–8; solid hardwood $5–10; porcelain tile $3–7; carpet $1.50–4 plus $0.50–1.50 underlay. Always get 3 quotes for installation — prices vary significantly by region, subfloor condition, and project complexity.
This free square footage calculator makes it easy to calculate room area for any home improvement project. Whether you are buying flooring, ordering paint, planning a tile installation, or estimating material costs for a renovation, simply enter your room dimensions to get the area in square feet or square meters instantly. The calculator supports rectangular rooms, L-shaped rooms, circles, triangles, and other shapes.
Measuring square footage accurately is essential before purchasing flooring, carpet, or tiles to avoid costly overbuying or running short. This free area calculator helps you get it right the first time by calculating the total area with precision. You can add multiple room sections together for a combined total — perfect for open floor plans or complex room shapes.
For a rectangular room: multiply length × width in feet. A 12 ft × 15 ft room = 180 sq ft. For L-shaped rooms: divide into two rectangles, calculate each area separately, and add them. Always measure to the longest point in each direction, including any alcoves or bump-outs that will receive flooring.
Industry standard: 10% for straight-lay hardwood or laminate; 15% for diagonal-lay patterns; 10% for straight tile; 15% for diagonal tile; 10% for carpet. Always buy extra rather than risk running short. Manufacturers run the same dye lot, so buying later may result in a visible colour mismatch.
1 sq ft = 0.0929 m². To convert: multiply sq ft × 0.0929. Going the other way: 1 m² = 10.764 sq ft. Example: 250 sq ft × 0.0929 = 23.2 m². Building permits, real estate listings in Quebec, and European building materials are typically in square meters.
Divide the L-shape into two rectangles. Measure each separately, calculate each area, then add. Example: Rectangle A = 12×10 = 120 sq ft; Rectangle B = 8×6 = 48 sq ft; total = 168 sq ft. Our calculator lets you add multiple sections and computes the combined total automatically.
One gallon covers approximately 350–400 sq ft per coat on smooth, previously-painted walls. New drywall or textured surfaces absorb more paint — expect 250–300 sq ft per gallon. Most repaints need 2 coats; going from a very dark to a light colour may need 3. Always add 10% for trim, edges, and touch-ups.
The average Canadian home is approximately 1,900 sq ft (177 m²). Condos in major cities typically range from 600–1,000 sq ft; detached suburban homes from 1,500–2,500 sq ft. New builds in Toronto and Vancouver trend smaller due to land costs, while homes in Calgary, Edmonton, and smaller cities tend to be larger for the price.
A 12×14 room = 168 sq ft of floor area. Add 10% waste for hardwood or laminate = 185 sq ft to order. Material costs in Canada (2025): laminate ~$2.50/sq ft = $463; engineered hardwood ~$5/sq ft = $925; porcelain tile ~$4/sq ft = $740. Add $2–5/sq ft for professional installation.
For flooring and painting projects, measuring yourself is straightforward and reliable. A laser distance measurer ($30–50 at hardware stores) makes it faster and more accurate than a tape measure alone. For real estate appraisal, MPAC assessment disputes, or insurance claims, a certified appraiser provides legally recognized measurements.