# Tree Carbon Calculator

URL: https://speedycalculator.com/calculators/ecology/tree-co2/
Last updated: 2026-10-25

> The tree carbon calculator estimates how much CO₂ a group of trees absorbs per year and over their lifetime, using an average sequestration rate per tree that you can adjust.

## Inputs

- Number of trees
- CO₂ absorbed per tree per year (kg)
- Years

## Results

- CO₂ per year
- Total CO₂ absorbed

## Formula

```
CO₂ = trees × rate per tree × years
```

## Explanation

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

FieldWhat to enterNumber of treesA numberCO₂ absorbed per tree per yearIn kgYearsA 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 treesTotal CO₂ absorbed (t)2510.537.515.8502162.526.37531.510042

## Worked 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**.

## FAQ

**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.