Question 1

How do I calculate square footage?

Accepted Answer

For rectangles: multiply length × width. For triangles: ½ × base × height. For circles: π × radius². For complex rooms, break them into simple shapes, calculate each, and add them together. The calculator does this automatically.

Question 2

How many square feet is a 10x10 room?

Accepted Answer

A 10×10 room is 100 square feet. A 12×12 room is 144 sq ft (the standard '12x12 room' used in real estate listings). Bedrooms are typically 100-200 sq ft, living rooms 200-400 sq ft, and 2-car garages around 400-500 sq ft.

Question 3

How much paint do I need for a room?

Accepted Answer

A standard interior wall takes about 1 gallon of paint per 350-400 square feet. So a 12×12 room (4 walls × 12 ft × 8 ft = 384 sq ft) needs about 1 gallon. Add 10% for wastage and a second coat. The calculator gives a 10% waste-adjusted estimate.

Question 4

How do I convert square feet to square meters?

Accepted Answer

Multiply square feet by 0.0929 to get square meters. For example, 1000 sq ft ≈ 92.9 m². This calculator shows all common area units simultaneously so you never need to convert manually.

Material Estimates