Square Footage Calculator

Multiply length by width to get square footage for a room, wall, floor, rug area, or other rectangle.

Length (feet)Width (feet)

Enter your numbers and calculate.

Examples

Example	Result
12 ft × 10 ft	120 sq ft
15.5 ft × 11 ft	170.5 sq ft

Frequently asked questions

How do I calculate square footage?

Multiply the length in feet by the width in feet.

What if the room is not rectangular?

Break it into rectangles, calculate each area, and add them together.

Can I use inches?

Convert inches to feet first by dividing inches by 12.

Public API & AI agent access

Yes — Square Footage Calculator is callable programmatically through /api/v1/square-footage, the public calculator API, MCP, A2A and WebMCP. Structured results include a human-facing citation URL.

Formula provenance

API identifier: square-footage · Formula version: tncalc.square-footage.1.0.0 · Engine release: 6.6.1. Build provenance · Public validation · Release history.

NEXT DECISION

Take this number one step further

Use the result as an input to a decision model that compares the next action rather than stopping at the calculation.