Can I enter mixed feet and inches like 12 ft 6 in?

Yes. In Imperial mode you can enter decimal feet or feet + inches directly and see exact square footage plus square meters.

Everyday & Home100% Client-Side · Instant Math

Square Footage Calculator

Estimate total floor area, material waste allowance, and project cost across rooms.

Section / Room Name

Subtract cutout

Length

Width

Subtract cutout

Length

Width

Material Waste Buffer (%)

Material Price / Unit (ft²)

Result Summary

Net Area (sq ft)

300.00 ft²

Net Area (m²): 27.87 m²

Order Quantity (+ Waste) (+10%)

330.00 ft²

30.66 m²

Estimated Material Cost

$1,485.00

How to Use This Calculator

Add multiple rooms or sections (Rectangles, L-Shapes, Circles, Triangles) in feet, inches, meters, or centimeters to get total sq ft, m², waste buffer (+10%), and estimated material budget.

1Choose measurement units (Feet/Inches or Meters/Centimeters) and add room dimensions.
2Add multiple rooms or subtract cutouts/closets if measuring net flooring or turf.
3Adjust the waste factor percentage (typically 10% for tile or hardwood) and optional price per sq ft / m².

Standard Formula & Methodology

Total Area = Σ Room Areas; Order Quantity = Total Area × (1 + Waste% / 100).

Helpful Context & Precision Notes

Shows both Square Feet (ft²) and Square Meters (m²) simultaneously so imported materials are easy to order.

All inputs stay locally inside your browser tab — nothing is uploaded or logged.

Frequently Asked Questions

Cutting planks or tiles around edges, closets, and diagonal seams inevitably creates offcuts; contractors typically recommend adding 10% extra (15% for diagonal layouts).