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Specific Humidity Calculator
Calculate specific humidity from vapour pressure and air pressure.
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Specific humidity
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Calculate specific humidity from vapour pressure and air pressure.
Specific Humidity Estimator
Enter your numbers below for an instant estimate.
0
💡 Tip: q = 0.622e / (p – 0.378e).
How It Works
Key concepts behind this calculator
1
Enter Values
Fill in each field with your own numbers.
2
Calculate
Results update as you change the inputs.
3
Review
Read the breakdown and the explanation.
4
Adjust
Change values to compare scenarios.
Quick Reference Guide
Specific Quick Guide
Typical values for reference.
| e hPa | p hPa | Spare | g/kg |
|---|---|---|---|
| 6 | 1013 | – | 3.69 |
| 12 | 1013 | – | 7.40 |
| 20 | 1013 | – | 12.37 |
| 30 | 1013 | – | 18.63 |
| Rule of Thumb | Check inputs | Use as a guide | Round sensibly |
Common Questions
Specific Humidity Calculator FAQ
Answers to common questions about this calculator.
Mass ratio.
It gives a quick estimate of specific humidity from the values you enter.
No. It is a planning estimate, so check important figures with a professional or official source.
Yes. Edit any field and the result updates when you calculate.