Free Ceiling Fan Tools
Quick, free tools for the questions people ask before buying a ceiling fan.
Our tools run in your browser, need no sign-up and show the rules they use, so you can check the result yourself.
- Ceiling fan size calculator: enter your room’s length and width (or square footage) and ceiling height to get the recommended blade span, a target airflow range in CFM and the downrod length that puts the blades at the right height.
Want the background first? Read our ceiling fan size guide or learn which way your ceiling fan should spin in summer and winter.
In this section
Free tool
Ceiling Fan Size Calculator
Enter your room size and ceiling height to get the blade span, mount type and downrod length to look for.
Free calculator