Home

What Size Ceiling Fan Do You Need?

Built by Kevin Glover · @gloverbuilds · Verified formula

Calculate the right ceiling fan diameter and CFM for your room size. Avoid buying one that is too small.

📅 Updated April 2026 ✅ Formula verified 📖 4 min read 🆓 Free · No sign-up

In this article

Ceiling Fan Sizing Guide
Fan Height and Mount Type

Empfehlung

Unter 10 m²: 90-105 cm. 10-18: 105-120. 18-28: 120-140. Ueber 28: 140+ oder zwei. Spart 15-25% Klimakosten.

In Deutschland

Nach den heissen Sommern 2018-2023 stark nachgefragt. CasaFan, Westinghouse sind beliebt.

⚡ CalcWolf Insight

The most energy-efficient cooling strategy: ceiling fan + thermostat raised 4°F. The fan costs 1/50th what the AC costs to run. A family using fans to raise their thermostat from 72°F to 76°F saves $200-400 per cooling season. Fans cool people, not rooms — turn them off when you leave.

Frequently asked questions

Fuer 16 m²?▾

120-130 cm. Groesser + niedrige Stufe = leiser.

Spart es wirklich?▾

15-25% Klimakosten. 2-5 €/Monat vs. 50-150 € fuer AC.

✓ Math logic verified against primary sources → See our verification process

Kevin Glover · @gloverbuilds

Founder, CalcWolf · GLVTS · Blickr

All formulas sourced from primary references — IRS publications, peer-reviewed research, and official standards. Results are tested against independent reference calculators before publishing. Rates and brackets updated when official sources change. Editorial policy →