Grams per cubic meter to vapor pressure
Type a value in g/m³ to get it in hPa instantly.
63.02hPa
That's 2× as humid as tropical air — nothing on our list beats it. A 50 m³ room at that level holds about 2,500 mL of water.
What it means
How much water is in the air?
Saturation values come from the Magnus formula, accurate to about 0.1% between −40 and 50 °C.
The math
How to convert g/m³ to hPa
Relative humidity is a percentage of saturation, and saturation depends steeply on temperature: g/m³ = RH% × saturation(T) ÷ 100. The figures below use the temperature selected above.
Example: 50 g/m³ = 63.0249 hPa.
The table below is for air at 0 °C, freezing.
Every unit
Your humidity in every unit
Tables
g/m³ to hPa conversion table
| g/m³ | hPa |
|---|---|
| 1 g/m³ | 1.2605 hPa |
| 2 g/m³ | 2.521 hPa |
| 5 g/m³ | 6.30249 hPa |
| 8 g/m³ | 10.084 hPa |
| 10 g/m³ | 12.605 hPa |
| 15 g/m³ | 18.9075 hPa |
| 17 g/m³ | 21.4285 hPa |
| 20 g/m³ | 25.21 hPa |
| 25 g/m³ | 31.5125 hPa |
| 30 g/m³ | 37.815 hPa |
| 50 g/m³ | 63.0249 hPa |
hPa to g/m³ conversion table
| hPa | g/m³ |
|---|---|
| 1 hPa | 0.793337 g/m³ |
| 2 hPa | 1.58667 g/m³ |
| 5 hPa | 3.96668 g/m³ |
| 8 hPa | 6.3467 g/m³ |
| 10 hPa | 7.93337 g/m³ |
| 15 hPa | 11.9001 g/m³ |
| 17 hPa | 13.4867 g/m³ |
| 20 hPa | 15.8667 g/m³ |
| 25 hPa | 19.8334 g/m³ |
| 30 hPa | 23.8001 g/m³ |
| 50 hPa | 39.6668 g/m³ |
Quick answers
Quick answers
- How many hPa is 1 g/m³?
- 1 g/m³ is 1.2605 hPa.
- How many hPa is 10 g/m³?
- 10 g/m³ is 12.605 hPa.
- How many hPa is 50 g/m³?
- 50 g/m³ is 63.0249 hPa.
The units
About these units
Grams per cubic meter (g/m³)
Absolute humidity: the actual water in the air.
Vapor pressure (hPa)
The pressure the water vapor alone exerts.
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