Calculate relative humidity, dew point, absolute humidity, vapor pressure, humidity ratio, moisture level, and comfort from temperature and humidity inputs. Use this humidity calculator for weather, gardening, greenhouses, houseplants, livestock areas, home comfort, condensation checks, and outdoor planning.
Humidity from temperature:
Enter air temperature and relative humidity to calculate dew point, absolute humidity, vapor pressure, and comfort level.
Humidity from dew point:
Enter air temperature and dew point to estimate relative humidity.
Comfort / moisture level:
The calculator compares relative humidity and dew point to common comfort ranges.
Condensation risk:
Enter a surface temperature to estimate whether moisture may condense on windows, walls, pipes, glass, plants, or stored items.
A humidity calculator helps understand moisture conditions beyond a simple percentage, including dew point, vapor pressure, absolute humidity, and condensation risk.
It can be useful for weather comfort, indoor humidity, greenhouses, gardening, plant care, barns, basements, storage areas, mold prevention, camping, and outdoor work planning.
Your result shows relative humidity, dew point, absolute humidity, actual vapor pressure, saturation vapor pressure, humidity ratio, moisture comfort level, condensation risk, and estimated water vapor in the selected room or space.
Relative humidity is the amount of moisture in the air compared with the maximum amount the air can hold at that temperature.
Many indoor spaces feel comfortable around 30% to 60% relative humidity, though comfort varies by temperature and personal preference.
Dew point is the temperature at which air becomes saturated. Higher dew point usually means the air contains more moisture.
Condensation can happen when a surface temperature is at or below the dew point of the surrounding air.