Room size calculator

Enter your room's dimensions and type to see its square footage and how it stacks up against typical room sizes.

Room length
ft
Room width
ft
Room type
Result
Room area120sq ft
Size for a bedroomAverage
Perimeter44 ft

Estimate only — "typical" ranges vary by region and home age.

What counts as small, average, or large?

We compare your room's area against typical US size ranges for that room type — bedrooms, living rooms, kitchens, bathrooms, and dining rooms all have different "normal" ranges. A small bathroom and a small living room are very different sizes, so the room type you pick changes the classification, not just the area calculation.

Frequently asked questions

100-200 sq ft is a typical average range for a US bedroom — under 100 sq ft is considered small (though still workable for a twin or full bed), and over 200 sq ft starts to feel spacious.

Perimeter is handy for estimating baseboard trim, crown molding, or wallpaper border length — multiply it by your ceiling height for a rough wall area if you're planning paint or wallpaper too.