calc of dew point temperature, wet bulb temperature

Example preset

preset

Inputs

temperature

Relative humidity RH (%)

Atmospheric pressure (optional)

Wind speed (optional)

Calculation result

Dew point temperature (Td)

—

Wet bulb temperature (Tw)

—

Sensible temperature (AT)

—

Heat index (HI)	—
Wind Chill	—
saturated water vapor pressure es	—
water vapor pressure e	—
Absolute humidity AH	—
Humidex (reference)	—
Mixing ratio w	—
specific humidity q	—

RH sensitivity chart (temperature fixed)

—

Calculation assumptions/application conditions

We calculate dew point with the Magnus approximation and switch coefficients by the sign of T.
We calculate wet bulb temperature with the Stull (2011) approximation and show a warning outside its recommended range.
The tool uses corrected sea-level pressure (MSL) at the selected point. If you need local pressure, enter it manually.
Heat index and wind chill show N/A outside their valid conditions.
These outputs are approximate reference values. Do not use them for safety-critical or medical decisions.

FAQ

What is dew point temperature?

This is the approximate temperature at which condensation begins when the air cools with a constant amount of water vapor.

Is wet bulb temperature an exact calculation?

No. The tool uses the fast Stull approximation. If your case is outside the recommended range, it still shows a reference value with a warning.

Why is the heat index and wind chill set to N/A?

Each metric has valid conditions. When your inputs fall outside those conditions, the tool shows N/A to avoid misleading output.

Can I leave the barometric pressure and wind speed blank?

Yes. Indicators that need missing inputs show N/A, while other indicators still calculate normally.

Why are the numbers a little different from other sites?

Differences occur due to differences in approximation formulas, preconditions, and rounding methods. Please use this as a reference value for learning and rough calculations.

How to use Dew point temperature, wet bulb temperature, sensible temperature calculation effectively

What this calculator does

This page is for estimating outcomes by changing inputs in one controlled workflow. The model keeps your focus on variables, not output shape. Start with stable assumptions, then test sensitivity by changing one key input at a time to observe directional impact.

Input meaning and unit policy

Each input has an expected unit and a typical range. For reliable interpretation, check whether you are using the same unit system, period, and base assumptions across all runs. Unit mismatch is the most common source of unexpected drift in numeric results.

Use-case sequence

A practical sequence is: first run with defaults, then create a baseline log, then run one alternative scenario, and finally compare only the changed output metric. This sequence reduces cognitive load and prevents false pattern recognition in early experiments.

Common mistakes to avoid

Avoid changing too many variables at once, mixing incompatible data sources, and interpreting a one-time output without checking robustness. A single contradictory input can flip conclusions, so keep each experiment minimal and document assumptions as part of your note.

Interpretation guidance

Review both magnitude and direction. Direction tells you whether a strategy moves outcomes in the desired direction, while magnitude helps you judge practicality. If both agree, you can proceed; if not, rebuild the baseline and verify constraints before deciding.

Operational checkpoint 1

Record the exact values and intent before you finalize any comparison. Confirm the unit system, date context, and business constraints. Compare outputs side by side and check whether differences are explained by one changed variable or by hidden assumptions. This checkpoint often reveals the single factor that changed everything.