120 sq ft bedroom
- Falls in 76–144 band → 36–42 inch fan recommended
construction calculator
Pick the right ceiling fan blade span based on room size.
Typical sizing guides: up to 75 sq ft → 29–36", 76–144 → 36–42", 144–225 → 44–50", 225–400 → 50–54", 400+ → 60"+.
We map your room size to a min/max fan size range using these reference bands.
Size bands (sq ft → fan span): Up to 75: 29–36" 76–144: 36–42" 145–225: 44–50" 226–400: 50–54" 400+: 60"+
Find the right ceiling fan size by entering room square footage to get a recommended blade span range.
Use the suggested range and adjust for ceiling height, openness, and airflow needs.
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Dehumidifier Size Calculator
Estimate the pints-per-day capacity needed based on room size and moisture level.
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Lighting Lumens Calculator
Estimate total lumens needed for a room based on square footage and room type.
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Drainage Slope Calculator
Convert rise/run to slope % and inches-per-foot for driveways, patios, and yard drainage.
Sizing guide only. Airflow also depends on CFM, blade pitch, and mounting height. Verify manufacturer recommendations before purchase.