Trees store carbon as they grow, but rates vary widely with species, age and climate.
How to use the Tree Carbon Calculator
- Number of trees
- CO₂ absorbed per tree per year
- Years
Results update as you type, and every field accepts the units shown in its menu.
How it works
Multiply the number of trees by the yearly uptake per tree and the number of years.
Inputs explained
| Field | What to enter |
|---|---|
| Number of trees | A number |
| CO₂ absorbed per tree per year | In kg |
| Years | A number |
What each result means
- CO₂ per year = [Number of trees]×[CO₂ absorbed per tree per year]
- Total CO₂ absorbed = [Number of trees]×[CO₂ absorbed per tree per year]×[Years]
Example values
How the main result changes when Number of trees changes and everything else stays at the example values above:
| Number of trees | Total CO₂ absorbed (t) |
|---|---|
| 25 | 10.5 |
| 37.5 | 15.8 |
| 50 | 21 |
| 62.5 | 26.3 |
| 75 | 31.5 |
| 100 | 42 |
Formula
CO₂ = trees × rate per tree × yearsWorked example
Inputs — Number of trees: 50; CO₂ absorbed per tree per year: 21 kg; Years: 20.
Results — CO₂ per year = 1,050 kg; Total CO₂ absorbed = 21 t.
Frequently asked questions
Is 21 kg per tree accurate?
It is an often-quoted average for a mature tree; young trees absorb less.
Can trees offset my emissions?
They help, but reducing emissions directly is more reliable.
What formula does the Tree Carbon Calculator use?
CO₂ = trees × rate per tree × years.