Learntrix
Room Area · Flooring & Tile Boxes · Waste Cost Estimator

Square Footage Calculator

Quickly calculate square footage (sq ft) and square meters (m²) for any room, flooring project, painting job, or multi-room home renovation. Includes waste allowances and box count estimators.

ft
in
ft
in
Materials, Waste Buffer & Cost
+10% extra (+17.40 sq ft)
$
sq ft/box
Total Square Footage
174.00

Square Feet (ft²) Net Measured Area

With 10% Waste:191.40 sq ft
Instant Metric & Imperial Conversions
Square Meters (m²)16.17 m²
Square Yards (yd²)19.33 yd²
Square Inches (in²)25,056 in²
Acres0.0040
Materials & Packaging Order Slip
Boxes / Cartons to Buy9 Boxes
Total Box Coverage202.50 sq ft
Base Net Cost$783.00
Total Estimated Cost (+10%)$861.30

How to Calculate Square Footage: Formulas & Guide

Square footage measures the 2-dimensional surface area inside a boundary. Whether you are buying hardwood flooring, ceramic tiles, wall paint, carpet, or sod for landscaping, knowing your exact square footage prevents overpaying contractors or running short mid-installation.

Rectangle / Square Room
Area = Length (ft) × Width (ft)

Example: 12 ft × 15 ft = 180 sq ft. If using inches, convert to feet first (e.g. 6 inches = 0.5 ft).

Circular / Semi-Circular Area
Area = π × r² (or π × (d/2)²)

Example: A circular patio with a 10 ft radius has an area of 3.14159 × 10² = 314.16 sq ft.

Triangle / Gable Wall
Area = ½ × Base (ft) × Height (ft)

Example: A triangular ceiling with a 20 ft base and 8 ft peak height has an area of 0.5 × 20 × 8 = 80 sq ft.

How Much Extra Flooring or Tile Should You Order for Waste?

Every flooring and tiling job requires edge cuts, corner trims, and allowances for damaged planks. Industry standard waste allowances:

  • 5% Waste Buffer: Standard rectangular rooms with straight-lay laminate or carpet.
  • 10% Waste Buffer (Recommended): Hardwood flooring, vinyl plank (LVP), and standard tile with closets or offsets.
  • 15% Waste Buffer: Rooms with diagonal layouts, herringbone patterns, curved walls, or large ceramic tile formats.
  • 20% Waste Buffer: Intricate mosaic tile sheets, circular layouts, or multiple stairs.
Total Area174.00 sq ft(16.17 m²)
For Educational Purposes Only

Results are provided for general informational and educational reference only. While we strive for accuracy, Learntrix makes no guarantee of the correctness or completeness of these results for any specific purpose. Actual figures may differ based on your circumstances. Do not rely solely on these results for any significant decision.

Learntrix · Accuracy not guaranteed · For reference only

Popular Financial & Math Calculators

All Calculators

EMI Calculator

Calculate monthly EMI for home, car, education and personal loans. Includes full amortisation schedule and total interest breakdown.

SIP Return Calculator

Project mutual fund SIP returns with monthly compounding, growth charts, step-up estimates, and wealth creation goals.

FD & RD Maturity Calculator

Calculate Fixed Deposit and Recurring Deposit maturity amount with quarterly compounding, TDS deduction, and effective yield.

PPF Calculator

Estimate your Public Provident Fund maturity corpus over 15 years with optional yearly deposit variations and extension periods.

🛺
Need a 2-Minute Brain Break?3D Game

Drift auto-rickshaws in Rickshaw Drift 3D or play Wordle Unlimited & 2048.

Play Drift 3DAll Games
Need PDF tools, text utilities, or converters? Try our free developer tools.Browse All 70 Tools