Square Meter Calculator
Calculate area in metric square meters (m²) for rectangular rooms, circles, and triangles, with waste allowances, square feet, and cost estimates.
Calculation Results
Exact geometric surface area in square meters (m²).
Total square meters of material required including layout cutting scrap.
Equivalent surface area in imperial square feet (sq ft).
Land area in hectares (1 ha = 10,000 m²).
Estimated material cost based on total square meters including waste.
How This Calculator Works
Calculate square meters for tiling, plastering, or flooring in four steps:
- Select Geometry: Choose rectangle for standard rooms, circle for round structures, or triangle for roofs and gables.
- Enter Metric Dimensions: Input lengths and widths in meters (e.g., 450 cm is entered as 4.5 m).
- Add Scrap Waste: Include 10% for standard flooring or drywall installation cuts.
- Review Takeoff: Get exact square meters, imperial square feet, and total material budget.
Formula & Calculations
Square meter area calculations use metric SI dimensions and standard geometry:
1. Geometric Formulas
- Rectangles:
Area (m²) = Length (m) × Width (m) - Circles:
Area (m²) = π × (Diameter / 2)² - Triangles:
Area (m²) = (Base × Height) / 2
2. Metric Unit Conversions
- Square Feet:
1 m² = 10.7639 sq ft - Square Yards:
1 m² = 1.19599 sq yd - Hectares:
1 Hectare = 10,000 m²(approx 2.471 acres)
Step-by-Step Calculation Examples
Apartment Living Room (6.0m x 4.5m)
Measuring tile flooring for a 27 m² room with 10% waste at $25/m².
- shape: rectangle
- length: 6
- width: 4.5
- waste: 10
- cost_per_sqm: 25
- net_area_sqm: 27.00 sq m
- gross_area_sqm: 29.70 sq m
- area_sqft: 319.7 sq ft
- area_hectares: 0.0030 ha
- estimated_cost: $742.50
Frequently Asked Questions
How do you calculate square meters from centimeters?
Measure your length and width in centimeters, multiply them together to get square centimeters, and divide by 10,000 (since 100 cm x 100 cm = 10,000 cm²). For example, a 500 cm by 400 cm room equals 200,000 cm² / 10,000 = 20 square meters.
How many square feet are in a square meter?
There are exactly 10.7639 square feet in 1 square meter. To convert square meters to square feet, multiply by 10.764. To convert square feet to square meters, divide by 10.764 (or multiply by 0.0929).
How do you calculate square meters of an L-shaped room?
Divide the room into two regular rectangles. Measure the length and width of each section in meters, multiply them to get each area (A1 = L1 x W1, A2 = L2 x W2), and add the two totals together.
What is a hectare in square meters?
A hectare (ha) is a metric land measurement equal to exactly 10,000 square meters (a square plot 100 meters by 100 meters). One hectare is equal to approximately 2.471 US acres.
Why is it called "sq m" or "m²"?
"m²" is the international scientific symbol for square meters under the International System of Units (SI). In colloquial English trade and retail packaging, it is frequently written as "sq m" or "sqm".
How much waste should I add for metric tile or laminate flooring?
For standard straight grid layouts, add 10% waste for wall border cuts. For herringbone or 45-degree diagonal tile patterns, add 15% to 20% waste.