Home Size Calculator
Enter who lives in the home, how many home offices and whether you want a guest room, then choose compact, comfortable or spacious. The calculator adds up typical room sizes to give the floor area you need, with bedrooms and bathrooms.
- Square feet needed
- Bedrooms and bathrooms
- Three space levels
Count children who will live with you for the next five years or more.
A home's size comes from the rooms you need. Add a bedroom for each child and couple, a bathroom for every two or three people, then the kitchen, living, dining and storage space. A family of four needs about 1,900 square feet for a comfortable home.
Home size chart
No office or guest room. Search for a household.
| Household | Compact | Comfortable | Spacious | Bedrooms |
|---|---|---|---|---|
| 1 adult | 1100 | 1290 | 1610 | 1 |
| 2 adults | 1120 | 1320 | 1650 | 1 |
| 2 adults, 1 child | 1420 | 1670 | 2090 | 2 |
| 2 adults, 2 children | 1600 | 1880 | 2360 | 3 |
| 2 adults, 3 children | 1830 | 2150 | 2690 | 4 |
| 2 adults, 4 children | 2070 | 2440 | 3050 | 5 |
Square feet including 20% for halls, stairs and storage.
People and home size
Comfortable. Slide the household size.
The plan shows each room as a block sized by its area.
How to work out home size
Rooms you need. Step through it.
Count people
Adults and kids.
To convert square feet to square metres, multiply by 0.093.
Compact, comfortable or spacious
Space levels. Compare them.
Smart use of space.
Typical new home.
Room to spread out.
Bigger homes cost more to heat, cool, clean and insure, not just to buy.
Before house hunting
Planning checks. Tick each item.
Tick each item as you go.
Layout matters as much as size. An open plan home can feel bigger than a larger home with many small rooms.
What you get
Home sizing. Each tile explains one result.
Square feet.
Square metres.
For everyone.
For the household.
Square feet each.
US homes are measured as finished living area; UK homes are often quoted in square metres internal area.
Frequently Asked Questions
No question matches that search.
How many square feet do I need?
About 1,300 for a couple and 1,900 for a family of four, at a comfortable level.
How many square feet per person?
About 450 to 650 in a typical family home.
How big should a home be for a family of 5?
About 2,150 square feet, with 4 bedrooms.
How many bathrooms do I need?
One for every two or three people.
What is the average home size?
About 2,200 sq ft for a new US home, around 1,000 sq ft in the UK.
How do I convert square feet to square metres?
Multiply by 0.093.
Does a home office add much space?
About 120 square feet each.
Space that fits your life
Add up the people and rooms to see how much home you need. Then shop for the right size instead of paying for space you will not use.
More size calculators
Each one has its own calculator, worked examples and answers to common questions.