Gigatonnes of CO₂ to parts per million
Type a value in GtCO₂ to get it in ppm instantly.
35.98ppm
Nothing on our list is smaller: the last ice age is 5.1× higher.
Convert the other way: ppm to GtCO₂
What it means
How much CO₂ is that?
Whole-atmosphere totals: 1 ppm = 2.124 GtC = 7.78 GtCO₂. About half of each year’s emissions stays in the air; oceans and land take the rest.
The math
How to convert GtCO₂ to ppm
To convert gigatonnes of CO₂ to parts per million, multiply by 0.128493.
Example: 280 GtCO₂ × 0.128493 = 35.9779 ppm.
In the other direction, 1 ppm = 7.78255 GtCO₂.
Every unit
That CO₂ in every unit
Tables
GtCO₂ to ppm conversion table
| GtCO₂ | ppm |
|---|---|
| 1 GtCO₂ | 0.128493 ppm |
| 2 GtCO₂ | 0.256985 ppm |
| 5 GtCO₂ | 0.642463 ppm |
| 10 GtCO₂ | 1.28493 ppm |
| 50 GtCO₂ | 6.42463 ppm |
| 100 GtCO₂ | 12.8493 ppm |
| 185 GtCO₂ | 23.7711 ppm |
| 280 GtCO₂ | 35.9779 ppm |
| 315 GtCO₂ | 40.4752 ppm |
| 350 GtCO₂ | 44.9724 ppm |
| 400 GtCO₂ | 51.3971 ppm |
| 424 GtCO₂ | 54.4809 ppm |
| 450 GtCO₂ | 57.8217 ppm |
| 500 GtCO₂ | 64.2463 ppm |
| 560 GtCO₂ | 71.9559 ppm |
ppm to GtCO₂ conversion table
| ppm | GtCO₂ |
|---|---|
| 1 ppm | 7.78255 GtCO₂ |
| 2 ppm | 15.5651 GtCO₂ |
| 5 ppm | 38.9127 GtCO₂ |
| 10 ppm | 77.8255 GtCO₂ |
| 50 ppm | 389.127 GtCO₂ |
| 100 ppm | 778.255 GtCO₂ |
| 185 ppm | 1,439.77 GtCO₂ |
| 280 ppm | 2,179.11 GtCO₂ |
| 315 ppm | 2,451.5 GtCO₂ |
| 350 ppm | 2,723.89 GtCO₂ |
| 400 ppm | 3,113.02 GtCO₂ |
| 424 ppm | 3,299.8 GtCO₂ |
| 450 ppm | 3,502.15 GtCO₂ |
| 500 ppm | 3,891.27 GtCO₂ |
| 560 ppm | 4,358.23 GtCO₂ |
Quick answers
Quick answers
- How many ppm is 1 GtCO₂?
- 1 GtCO₂ is 0.128493 ppm.
- How many ppm is 10 GtCO₂?
- 10 GtCO₂ is 1.28493 ppm.
- How many ppm is 280 GtCO₂?
- 280 GtCO₂ is 35.9779 ppm.
The units
About these units
Gigatonnes of CO₂ (GtCO₂)
Billions of tonnes of carbon dioxide.
Parts per million (ppm)
Mixing ratio in the atmosphere.
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