Humidifier Sizing Calculator
Calculate the humidifier capacity needed to raise humidity from current to target level in a given room volume.
How to Use the Humidifier Sizing Calculator
- Enter the room volume in m³.
- Enter the target humidity percentage.
- Enter the current humidity percentage.
- Click Calculate for required daily output.
Use Cases
- •Selecting a whole-house humidifier.
- •Portable humidifier capacity check.
- •Office or studio humidity control.
- •Winter dry air comfort improvement.
Formula
Water needed = volume × 1.2 kg/m³ × RH_delta × 0.017 kg/kg. Daily = result × 24 hrs.
Frequently Asked Questions
What humidity level is comfortable?
Relative humidity of 40–60% is generally considered comfortable and healthy indoors.
Why does room volume matter?
Larger rooms hold more air and require more water vapour to raise humidity to the target level.
Can humidity be too high?
Yes — above 60% RH encourages mould growth and dust mite proliferation.