Tools
Dew Point Calculator
The dew point is the temperature at which air, at that humidity, starts to leave water. If glass or a wall is colder, condensation appears; if the surface stays wet for long, mould has a favourable condition. Enter temperature and relative humidity: the Magnus formula gives an estimate, not a certificate.
Surface mould-risk estimate
Compare estimated surface relative humidity with the conventional 80% threshold in EN ISO 13788.
Dehumidifier sizing estimate
Estimate litres/day from volume, how damp the space feels, and indoor laundry. Not a laboratory rating.
Dehumidifier running cost
kWh and euros from watts, hours and the unit price on your own bill. No invented tariffs.
Guided damp diagnosis
A short question path on where the problem appears, when, and whether it climbs from the floor. A working hypothesis, not a survey.
Home humidity log
Record temperature and relative humidity for two weeks. Dew point is calculated each day. Data stays on your device.