Sq Ft Calculator
Pick a room size or enter feet and inches to get instant area totals for one room or several.
Calculate Your Room Area
sq ft
Enter a number like 12, or mix units like 12'6".
Total Area
Square feet
- Square yards
- Square meters
Enter dimensions to see your total.
Results are rounded to 2 decimal places.
Common Room Sizes in Square Feet
Room dimensions can suggest possible uses, but layouts vary. A 10 by 10 foot space might serve as a compact bedroom or office, while larger rectangles can accommodate living areas, garages, or workshops. Use these examples as measurement references rather than required room standards. This table assumes complete rectangular spaces, with both dimensions measured in feet, excluding any additional alcoves.
| Room size (ft) | Area (sq ft) |
|---|---|
| 10 × 10 | 100 |
| 10 × 12 | 120 |
| 12 × 12 | 144 |
| 12 × 15 | 180 |
| 12 × 20 | 240 |
| 15 × 15 | 225 |
| 15 × 20 | 300 |
| 16 × 20 | 320 |
| 20 × 20 | 400 |
| 20 × 25 | 500 |
| 20 × 30 | 600 |
| 25 × 30 | 750 |
| 30 × 30 | 900 |
| 30 × 40 | 1,200 |
Sq Ft Conversion Chart
Compare common floor areas across three units before reading material estimates or property measurements. Divide square feet by nine for square yards, or multiply by 0.09290304 for square meters. Values below are rounded to two decimal places; use the calculator for other amounts and combine rooms before rounding your total.
| sq ft (ft²) | sq yards (yd²) | sq meters (m²) |
|---|---|---|
| 100 | 11.11 | 9.29 |
| 200 | 22.22 | 18.58 |
| 500 | 55.56 | 46.45 |
| 1,000 | 111.11 | 92.90 |
| 2,000 | 222.22 | 185.81 |
| 5,000 | 555.56 | 464.52 |
How to Use the Sq Ft Calculator
- Choose a preset or enter dimensions. Tap a size pill above the inputs to fill both measurements for that area. For example, 12 × 15 immediately produces 180 sq ft. Presets use feet. If your measurements differ, edit Length (ft) or Width (ft). Enter 12.5, 12'6", or 12 ft 6 in for twelve feet and six inches.
- Read the three results. Square feet appears first, followed by square yards and square meters. Every edit updates the results automatically. An empty or unfinished measurement displays a dash instead of a zero. Check both dimensions before using the area to compare material quantities.
- Add another room if needed. Select Add another area beneath the results. Use the new row's presets or enter its measurements manually. Repeat for other rectangular spaces. Each row stays independent, and the total includes completed areas only. Remove a row to exclude it from the project.
Sq Ft Calculator FAQ
How do I calculate square footage of a room?
Measure the length and width of a rectangular room in feet, then multiply the two numbers. For example, a room measuring 10 feet by 12 feet covers 120 square feet. Measure separate rectangular sections individually if the room has alcoves or an irregular outline.
How many square feet is a 12x12 room?
A room measuring 12 feet by 12 feet contains 144 square feet. Select the 12 × 12 preset to fill both dimensions instantly. This area also equals 16 square yards, assuming a complete rectangular floor with no missing corners or additional sections.
How do I quickly calculate sq ft for a room?
Choose a preset that matches your room, or type its length and width in feet. The result updates immediately without a submit button. For a room between preset sizes, select a nearby preset and then edit either measurement to match your tape measure.
What do 10×10, 12×12, and 20×20 equal in square feet?
When the measurements are in feet, a 10×10 room is 100 square feet, a 12×12 room is 144 square feet, and a 20×20 room is 400 square feet. Multiply the two dimensions; doubling both sides makes the area four times larger.
How do I enter feet and inches in the sq ft calculator?
Type a decimal measurement such as 12.5, or enter 12'6" or 12 ft 6 in. Each represents 12 feet and 6 inches. The calculator also accepts curved quotes copied from a phone. Use the same supported format independently in the length and width fields.
How do I calculate the total square footage of multiple rooms?
Select Add another area below the results, then enter the next room's dimensions or use its presets. Each area keeps its own measurements and subtotal. The total includes all completed areas; an unfinished or invalid row is excluded and identified beside the total.
How do I convert square feet to square yards?
Divide the area in square feet by nine. A square yard measures three feet along each side, so it covers nine square feet. For example, 180 square feet equals 20 square yards. The calculator performs this conversion automatically alongside the square meter result.
How many square yards is 1,000 sq ft?
An area of 1,000 square feet is approximately 111.11 square yards: divide 1,000 by 9. The exact value repeats, so the displayed result is rounded to two decimal places. Match this unit to the seller's price when comparing material quotes.