Free Online Square Footage Calculator
Calculate area for rooms and spaces
Total Area
300 sq ft
| Room | Area |
|---|---|
| Living Room | 180 sq ft |
| Bedroom | 120 sq ft |
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About this tool
Calculate the square footage of any room or space with this free area calculator. Add multiple rooms with length and width measurements to get per-room and total square footage. Supports both feet and meters with a one-click toggle. Optionally enter a cost per square foot to estimate flooring, painting, or renovation costs. Whether you are measuring for new flooring, listing a home, planning a renovation, or figuring out how much paint to buy, this calculator handles multi-room calculations in seconds. All processing happens in your browser.
How to use Square Footage Calculator
- Add rooms. Enter room name, length, and width for each space.
- Choose units. Toggle between feet and meters.
- View totals. See per-room area and total square footage, plus optional cost estimate.
Frequently Asked Questions
Multiply the length by the width of the space in feet. For example, a room 12 feet long and 10 feet wide is 12 × 10 = 120 square feet. For irregularly shaped rooms, break them into rectangles, calculate each, and add them up.
Multiply square feet by 0.0929. For example, 200 sq ft × 0.0929 = 18.58 square meters. To convert back, multiply square meters by 10.764.
Average bedroom: 120–200 sq ft. Master bedroom: 200–350 sq ft. Living room: 200–400 sq ft. Kitchen: 100–200 sq ft. Bathroom: 40–100 sq ft. These vary widely by home size and style.
Calculate total square footage of all rooms, then add 10% for waste and cuts. For example, if your rooms total 500 sq ft, order 550 sq ft of flooring material.
Multiply total square footage by cost per square foot. For example: 200 sq ft × $5/sq ft = $1,000. This calculator includes an optional cost field to do this automatically.
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