Dew Point Calculator
Calculate dew point, relative humidity, vapor pressure and comfort category using Magnus weather formulas.
Enter any two known values and choose what to solve for. Inputs are clamped to practical weather ranges.
Hit Calculate to see the comfort zone
Fog/condensation context appears here
Metrics appear after calculation
Your explanation appears here
Relative humidity changes with temperature, while dew point directly reflects actual moisture in the air.
Your plan appears after calculation
Simulate how changing air temperature or humidity changes the dew point.
Calculate your baseline first
This tool uses a Magnus formula approximation to convert between air temperature, relative humidity and dew point. It runs entirely in your browser and is suitable for everyday weather and indoor comfort estimates.
A dew point around 33–55°F is usually comfortable for many people. Above the low 60s °F, air often feels muggy; above the mid 60s °F, it can feel oppressive, especially with heat.
Relative humidity is a percentage of saturation at the current temperature. Cold air can show high RH while holding little actual moisture, so dew point and absolute humidity often explain comfort better.
Results are estimates generated locally in your browser using standard dew point approximations. They are for informational purposes only, not a substitute for calibrated meteorological instruments, industrial safety procedures, building-envelope analysis, or medical guidance. VisionVix accepts no liability for decisions based on this output.
