Ceiling fan size calculator: what size ceiling fan do I need for my room?
44 in blade span
180 sq ft, ENERGY STAR row 144 to 225 sq ft · 8 ft ceiling: standard mount, its 3 to 5 in downrod · for a 12 × 15 ft room
Run your own numbers
Enter it the way you measured it: 4.5, 4 1/2,
3/8 or 10' 6".
44 in blade span
180 sq ft, ENERGY STAR row 144 to 225 sq ft · 8 ft ceiling: standard mount, its 3 to 5 in downrod
Source: ENERGY STAR, Ceiling Fan Basics: suggested fan size by room size (American Lighting Association, 2003) and mounting height (U.S. EPA), read November 7, 2026. Read the source
A 12 by 15 foot room, 180 square feet, takes a ceiling fan with a 44 in blade span by the ENERGY STAR chart (144 to 225 square feet), hung at least 7 feet above the floor and 18 inches from the walls.
A worked example
A 13 ft 9 in × 17 ft 4 in living room with an 11 ft ceiling needs 50 to 54 in blade span. 238.3 sq ft is in the 225 to 400 row, 50 to 54 in. At 11 ft, the fan hangs 24 to 36 in below the ceiling to sit 8 to 9 ft above the floor.
What size ceiling fan for a 12x12 room?
144 sq ft sits on two rows of the ENERGY STAR chart: 36 to 42 in (76 to 144 sq ft) and 44 in (144 to 225 sq ft). A 10 × 12 room, 120 sq ft, takes 36 to 42 in.
How high should a ceiling fan hang?
At least 7 ft above the floor and 18 in from the walls, and 8 to 9 ft up where the ceiling allows, says ENERGY STAR. On a 10 ft ceiling that is 12 to 24 in down from the ceiling; under 8 ft, a hugger mount.
What else it is called
Also searched as ceiling fan size by room size, a ceiling fan size chart, a ceiling fan size calculator or what size ceiling fan for a 10x12 room. Blade spans run from 29 to 54 inches, ENERGY STAR says, the most popular being the 52 inch model.
Fan size by room size
| Room | Area | Blade span |
|---|---|---|
| 8 × 8 ft | 64 sq ft | 29 to 36 in |
| 10 × 10 ft | 100 sq ft | 36 to 42 in |
| 10 × 12 ft | 120 sq ft | 36 to 42 in |
| 12 × 12 ft | 144 sq ft | 36 to 42 in or 44 in |
| 12 × 14 ft | 168 sq ft | 44 in |
| 12 × 15 ft | 180 sq ft | 44 in |
| 14 × 16 ft | 224 sq ft | 44 in |
| 15 × 15 ft | 225 sq ft | 44 in or 50 to 54 in |
| 16 × 20 ft | 320 sq ft | 50 to 54 in |
| 20 × 20 ft | 400 sq ft | 50 to 54 in |
ENERGY STAR, Ceiling Fan Basics (American Lighting Association, 2003): up to 75 sq ft, 29 to 36 in; 76 to 144 sq ft, 36 to 42 in; 144 to 225 sq ft, 44 in; 225 to 400 sq ft, 50 to 54 in. 144 and 225 sq ft are on two rows. Mount at least 7 ft above the floor and 18 in from the walls, 8 to 9 ft up where the ceiling allows.
Where the numbers come from
- ENERGY STAR, Ceiling Fan Basics, suggested fan size: up to 75 sq ft, 29 to 36 in; 76 to 144 sq ft, 36 to 42 in; 144 to 225 sq ft, 44 in; 225 to 400 sq ft, 50 to 54 in (American Lighting Association, 2003). Read November 7, 2026. ENERGY STAR guide
- ENERGY STAR mounting: “at least 7 feet above the floor and 18 inches from the walls. If ceiling height allows, install the fan 8 - 9 feet above the floor for optimal airflow.” “Standard mounts come with a 3 – 5 inch downrod.” “Downrods can be purchased from 6 inches (9 ft ceiling) to 120 inches (20 ft ceiling).” “Hugger fans are ideal for rooms that have ceilings under 8 feet.” ENERGY STAR guide
- Where the chart leaves it open, this page decides and says so: a room of exactly 144 or 225 sq ft sits on two rows and gets both, between 75 and 76 sq ft it takes the 76 to 144 row, and the drop from the ceiling is the ceiling height less 8 to 9 ft.
The chart stops at 400 sq ft, a 20 × 20 ft room, and so does this calculator. Under 8 ft a hugger fan sits flush, and ENERGY STAR notes it moves less air than a regular fan because its blades are closer to the ceiling.
By Javier Miralles · Last updated . How this site is made.
Other materials
Embed this calculator
Free to use on your own site. Copy the code and keep the credit line.