Grams per cubic meter to relative humidity
Type a value in g/m³ to get it in %RH instantly.
1,031.167%RH
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.
Convert the other way: %RH to g/m³
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 %RH
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 = 1,031.17 %RH.
The table below is for air at 0 °C, freezing.
Every unit
Your humidity in every unit
Tables
g/m³ to %RH conversion table
| g/m³ | %RH |
|---|---|
| 1 g/m³ | 20.6233 %RH |
| 2 g/m³ | 41.2467 %RH |
| 5 g/m³ | 103.117 %RH |
| 8 g/m³ | 164.987 %RH |
| 10 g/m³ | 206.233 %RH |
| 15 g/m³ | 309.35 %RH |
| 17 g/m³ | 350.597 %RH |
| 20 g/m³ | 412.467 %RH |
| 25 g/m³ | 515.583 %RH |
| 30 g/m³ | 618.7 %RH |
| 50 g/m³ | 1,031.17 %RH |
%RH to g/m³ conversion table
| %RH | g/m³ |
|---|---|
| 1 %RH | 0.0484888 g/m³ |
| 2 %RH | 0.0969775 g/m³ |
| 5 %RH | 0.242444 g/m³ |
| 8 %RH | 0.38791 g/m³ |
| 10 %RH | 0.484888 g/m³ |
| 15 %RH | 0.727331 g/m³ |
| 17 %RH | 0.824309 g/m³ |
| 20 %RH | 0.969775 g/m³ |
| 25 %RH | 1.21222 g/m³ |
| 30 %RH | 1.45466 g/m³ |
| 50 %RH | 2.42444 g/m³ |
Quick answers
Quick answers
- How many %RH is 1 g/m³?
- 1 g/m³ is 20.6233 %RH.
- How many %RH is 10 g/m³?
- 10 g/m³ is 206.233 %RH.
- How many %RH is 50 g/m³?
- 50 g/m³ is 1,031.17 %RH.
The units
About these units
Grams per cubic meter (g/m³)
Absolute humidity: the actual water in the air.
Relative humidity (%RH)
A percentage of what this air could hold at its temperature.
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