Free Ceiling Fan Calculators
Four specialized tools for ceiling fan planning. Each calculator handles a specific part of the selection process: downrod sizing, airflow requirements, motor efficiency, and multi-fan placement.
Enter your ceiling height and get the exact downrod length needed to put fan blades at the ideal 8 to 9 foot height. Includes slope correction for vaulted ceilings and standard rod size output.
Find the minimum and recommended CFM airflow for your room. Accounts for room type, ceiling height, and air changes per hour. Includes CFM-per-watt efficiency benchmarks.
Compare AC vs DC motor operating costs side by side. Enter wattage, usage hours, and your electricity rate to see annual savings, 10-year totals, and the DC motor payback period.
For rooms over 400 square feet, open-concept layouts, and L-shaped spaces. Calculates how many fans you need and where to place them for even airflow coverage.
The main ceiling fan size calculator — which gives blade span, mount type, downrod length, CFM range, and safety warnings from your room dimensions — is on the home page.
Open main calculatorThe guides cover CFM, motor types, mounting, and installation in detail.