Home
Back
Approximate RH Formula:
| From: | To: |
The approximate relative humidity formula provides a quick estimation of humidity levels based on temperature and dew point measurements. It's a simplified calculation useful for general purposes.
The calculator uses the approximate RH formula:
Where:
Explanation: This formula provides a linear approximation of relative humidity based on the temperature-dew point depression. For every 1°C difference between temperature and dew point, relative humidity decreases by approximately 5%.
Details: Humidity estimation is important for weather forecasting, indoor climate control, agricultural planning, and various industrial processes. While this formula provides an approximation, it's useful for quick assessments.
Tips: Enter temperature and dew point values in Celsius. Ensure temperature is greater than or equal to dew point for valid results. The calculator will provide an estimated relative humidity percentage between 0-100%.
Q1: How accurate is this approximation?
A: This is a simplified formula that provides reasonable estimates for typical conditions but may not be precise for all atmospheric conditions.
Q2: What are typical RH values?
A: Comfortable indoor RH is typically 30-50%. Below 30% may feel dry, above 60% can feel humid and promote mold growth.
Q3: When is this approximation most accurate?
A: The formula works best when temperature and dew point are relatively close (small depression) and in moderate temperature ranges.
Q4: Are there limitations to this formula?
A: Yes, this is a linear approximation and doesn't account for all atmospheric variables. For precise measurements, use psychrometric charts or digital hygrometers.
Q5: Can this be used for scientific purposes?
A: For scientific or meteorological applications, more complex formulas or direct measurements with calibrated instruments are recommended.