Square Footage Calculator

Calculate the total area of rooms and properties in both square feet and square meters.


About Square Footage Calculator

This square footage calculator helps you measure the total area of any space — whether it's a single room, an entire property, or multiple areas. Add as many rooms as you need, choose between feet and meters, and optionally use inches for precise measurements. Results are displayed in both square feet and square meters, with a per-room breakdown. Perfect for home improvement projects, real estate listings, flooring estimates, and interior design planning.

Multiple Rooms

Add unlimited rooms to calculate combined square footage — perfect for whole-house or multi-room projects.

Feet & Meters

Toggle between imperial (feet) and metric (meters) units with automatic conversion between both systems.

Inches Precision

Enable inches input for precise measurements when exact dimensions matter for materials and planning.

Home Projects

Ideal for flooring, painting, tiling, HVAC sizing, and any home improvement project requiring area measurements.

📋 Common Use Cases

DIY Home Renovation

Plan paint, flooring, or fencing projects with precise material estimates. Know exactly how many gallons, boxes, or bags to buy before heading to the hardware store.

Contractor Bid Verification

Double-check contractor material estimates to ensure you are not overpaying. Understand the math behind their quotes for framing, roofing, or concrete work.

Landscaping Projects

Calculate mulch, soil, or gravel needed for garden beds and landscaping. Enter irregular shapes and depths for accurate cubic yard estimates.

Budget Planning

Use material quantity estimates to build accurate project budgets. Factor in waste percentages and compare material costs across different product options.

🪜 How to Use This Tool

  1. Measure your space
    Enter length, width, and height/depth in feet or meters. For irregular spaces, break the area into rectangles and calculate each separately.
  2. Configure material specifications
    Select material type, coverage rate, bag size, or waste factor. Each calculator uses industry-standard coverage rates for its specific material.
  3. Review material estimates
    See total area, material quantity in standard units (gallons, bags, cubic yards), and estimated cost range based on typical retail prices.
  4. Adjust for your project specifics
    Add extra for waste, multiple coats, or pattern matching. Round up to full units — it is always better to have a small surplus than to run short mid-project.

📚 Related Guides

Frequently Asked Questions

Are these calculators really free?â–¼
Yes. All calculators on iluv.tools are completely free. No signup, no account, no credit card required. Every calculation runs instantly in your browser.
Is my data sent anywhere?â–¼
Absolutely not. All calculators are pure client-side JavaScript. Your numbers, dates, and inputs never leave your browser. No server processing, no tracking.
How accurate are these calculators?â–¼
Calculators use standard mathematical formulas with double-precision floating point. Results match industry-standard financial and scientific calculations.
Can I use calculators on mobile?â–¼
Yes. All calculators work on mobile browsers (iOS Safari, Android Chrome) with responsive layouts.