Square Footage Calculator
Calculate square footage for rooms and spaces with multi-room support and cost estimation.
Frequently Asked Questions
How do I calculate square footage?
Square footage is calculated by multiplying the length by the width. For example, a 20-foot by 15-foot room equals 300 square feet (20 × 15 = 300).
How can I estimate the cost of flooring or painting?
Most flooring and painting materials are priced per square foot. Multiply your square footage by the cost per square foot to get the total cost. This calculator does that automatically.
Can I calculate multiple rooms at once?
Yes! Use the "Add Room" button to add as many rooms as you need. The calculator will automatically sum the total square footage for your entire space.
How accurate does my measurement need to be?
Measurements to the nearest foot are usually sufficient for estimating costs. If you need precise measurements for construction, measure to the nearest inch or use professional surveys.
What if my room is L-shaped?
For L-shaped rooms, divide them into rectangles, calculate the square footage for each rectangle separately, and add them together. For example, an L-shaped room can be thought of as two rectangles.