Average Apartment Size
The average US apartment is about 910 square feet, and a studio is closer to 460. Those are national figures, so the useful part is the spread underneath them: the same "one bedroom" label covers 600 square feet in San Francisco and 900 in Houston. Measure the unit you're actually looking at with the calculator, then use the tables below to see where it sits.
Average apartment size by unit type
RentCafe's analysis of rental listings puts the national average at 910 square feet in 2025, up 13 square feet on the year.
| Unit type | Average size | In square meters |
|---|---|---|
| Studio | 460 sq ft | 42.7 m2 |
| One bedroom | 735 sq ft | 68.3 m2 |
| Two bedroom | 1,095 sq ft | 101.7 m2 |
| Three bedroom | 1,355 sq ft | 125.9 m2 |
| All apartments | 910 sq ft | 84.5 m2 |
Why you will see two different national averages
If you search this, you'll find figures from about 900 to over 1,050 square feet, and both are correct. They count different housing.
RentCafe measures floor plans in professionally managed apartment buildings, which skews toward newer, purpose-built rentals. An analysis using Census Bureau American Housing Survey data puts the overall average at 1,052 square feet as of Q3 2025, with studios at 440, one bedrooms at 804, two bedrooms at 1,089 and three bedrooms at 1,593, because it includes the entire rental stock: older buildings, converted houses, duplexes, and single-family homes that happen to be rented.
| RentCafe (managed buildings) | Census AHS (all rentals) | |
|---|---|---|
| Studio | 460 sq ft | 440 sq ft |
| One bedroom | 735 sq ft | 804 sq ft |
| Two bedroom | 1,095 sq ft | 1,089 sq ft |
| Three bedroom | 1,355 sq ft | 1,593 sq ft |
| Overall | 910 sq ft | 1,052 sq ft |
The gap widens as the unit gets bigger, which makes sense: a rented three-bedroom house pulls the Census figure up, and purpose-built three-bedroom apartments are relatively rare. If you're comparing a listing against an average, use the managed-building figures for a new complex and the Census figures for an older building or a rented house.
This is the same lesson that runs through every square footage number: the figure depends on who measured and what they counted, which how square footage is measured covers for homes.
Studio apartments
A studio averages 460 square feet, which is roughly a 20 by 23 foot room once you take out the bathroom. Anything under about 400 square feet is a small studio, and micro-units in dense cities run 250 to 350.
What that has to hold: a bed, somewhere to sit, a kitchen wall, and a path between them. A queen bed alone occupies about 33 square feet and wants 24 to 30 inches of clearance on the sides you use, which average bedroom size works through by bed size. In a 460 square foot studio the bed is usually the room's organizing decision.
One, two, and three bedroom apartments
A one bedroom at 735 square feet is typically a 12 by 12 bedroom, a living area around 200 square feet, a galley or open kitchen, and a bathroom. That's close to the standard room sizes a house uses, just fewer of them.
Two bedrooms average 1,095 square feet, and the second bedroom is usually the one that shrinks. It's common to find a 12 by 13 primary and a 9 by 10 second bedroom in the same unit, which is why bedroom count alone tells you little about whether the unit works.
Three bedrooms average 1,355 square feet in managed buildings. At that size you're into the range of a small house, and the comparison below is worth making before signing.
Apartments compared to houses
| Average size | |
|---|---|
| Studio apartment | 460 sq ft |
| One bedroom apartment | 735 sq ft |
| Two bedroom apartment | 1,095 sq ft |
| Three bedroom apartment | 1,355 sq ft |
| US house (average) | About 2,400 sq ft |
An average three-bedroom apartment is a little over half the size of the average US house, and a two-bedroom is under half. Average square footage of a house has the house side, including how home size has climbed by decade.
By city
City is the biggest variable in the whole data set. Among the smallest, San Francisco averages 562 square feet and New York City 779, while southern and southwestern metros like Houston and Charlotte run considerably larger for the same rent bracket.
Over a decade the shifts are smaller than people assume. RentCafe found San Francisco apartments gained 35 square feet and Queens 16 over ten years, while Seattle lost 47.
What the listed square footage includes
Apartment listings are not measured to a national standard the way an appraisal is, so treat a listed figure as a claim. Things to check:
- Balconies and patios. Sometimes included, often not. Outdoor space is not living area under the standard used for homes, which what counts as square footage explains.
- The floor plan is a plan. Published floor plans usually show the unit type, not your specific unit. Corner units and top floors vary.
- Interior versus exterior walls. Apartment figures are normally measured inside the unit, unlike a house's gross living area, which is measured to the outside of the exterior walls. That alone makes an apartment's number look smaller than a house's for the same usable space.
- Rent per square foot. Dividing rent by square footage is the honest way to compare two units, and the price per square foot calculator does it in either direction.
Measuring your own apartment
Measure each room wall to wall, multiply length by width, and add the rooms together, including closets and hallways. Leave out the balcony and record it separately.
For an L-shaped living area or an angled wall, split it into rectangles first. The room calculator adds the pieces as you enter them, and the irregular shape calculator handles anything with a curve or a corner cut off.
If your lease is in square meters, or you're comparing against a listing abroad, the square feet to square meters converter runs both directions. Most of the world quotes apartments in square meters, and 84.5 m2 sounds a lot smaller than 910 square feet until you convert it.
Common mistakes
Comparing a listed size to a national average without checking the source. Managed-building averages and Census averages differ by more than 100 square feet overall.
Assuming bedroom count predicts size. A 900 square foot two bedroom and a 1,200 square foot two bedroom are both common.
Counting the balcony. It's usable space, but it isn't floor area, and including it inflates your rent per square foot comparison.
Trusting the floor plan PDF. It describes a unit type. Measure the one you're renting.
Frequently asked questions
What is the average apartment size in the US?
About 910 square feet across professionally managed buildings in 2025. Counting the entire rental stock, including older buildings and rented houses, the Census-based figure is closer to 1,052 square feet.
What is the average studio apartment size?
About 460 square feet, or 42.7 square meters. Anything under 400 square feet is a small studio, and micro-units run 250 to 350.
How many square feet is a 1 bedroom apartment?
About 735 square feet on average in managed buildings, and around 804 square feet counting all rentals. That typically means a 12 by 12 bedroom plus a living area of around 200 square feet.
How many square feet is a 2 bedroom apartment?
About 1,095 square feet. The second bedroom is usually noticeably smaller than the first, often around 9 by 10 feet against a 12 by 13 primary.
How big is a 3 bedroom apartment?
About 1,355 square feet in a managed building, which is a little over half the size of the average US house. Counting rented houses as well, the average rises to roughly 1,593 square feet.
Why do apartment size averages differ between sources?
Because they count different housing. Listing-based data covers professionally managed, mostly newer buildings. Census survey data covers the whole rental stock, including older units, duplexes and rented single-family homes, which pushes the average up.
Does the listed square footage include the balcony?
Sometimes, and it varies by building. Outdoor space is not living area under the standard used for houses, so ask what the number includes before comparing two units on rent per square foot.
How do I measure my apartment's square footage?
Measure each room's length and width in feet, multiply, and add the rooms together including closets and hallways. Split L-shaped rooms into rectangles. Keep the balcony as a separate figure.
Sources
- National average apartment size, RentCafe
- Average apartment size by type and city, HireAHelper analysis of Census Bureau data
Related guides
Average square footage of a house | Average bedroom size | Standard room sizes | Room calculator