Find the right ceiling fan blade span for a room’s size and the downrod length for your ceiling height, with clearance and placement tips.
About this tool
Find the right ceiling fan blade span and mounting height for a room.
How to use Ceiling Fan Size Calculator
- Enter the room length and width.
- Enter the ceiling height.
- Read the recommended blade span and mounting.
Worked example
A 14 × 12 ft bedroom with a 9 ft ceiling suits a 44–50 in fan on a 6 in downrod.
How high should the blades be?
Ideally 8–9 ft above the floor and never below 7 ft.
What if the room is very large?
Rooms over 400 sq ft often work better with two fans.
Explore Home Calculators · More practical guides