A common estimate is about 20 to 50 trees to offset 1 ton of CO2, depending on tree species, climate, soil, age, and how long the trees are allowed to grow.

Quick Scoop

Different sources give slightly different numbers because trees do not all absorb carbon at the same rate. One source estimates 31 to 46 trees per ton of CO2, another says 20 to 25 mature trees over their lifetime, and another notes 50 trees growing for one year to capture 1 tonne of CO2.

Why the range varies

  • Young trees usually absorb less CO2 than mature, fast-growing trees.
  • A tree’s carbon uptake depends heavily on local conditions and species.
  • Some estimates use annual absorption, while others use lifetime sequestration.

Practical takeaway

If you want a simple rule of thumb, 40 trees per ton of CO2 is a reasonable middle estimate based on one reforestation example. That said, tree planting helps most when paired with cutting emissions first, because trees take time to grow and do not offset emissions instantly.

TL;DR

For 1 ton of CO2 , think roughly 20–50 trees , with around 40 trees often used as a practical estimate.