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Trees-to-offset calculator: how many trees balance your emissions?

Enter your yearly emissions and see how many trees it takes to take up the same CO₂ once they are mature, allowing for survival.

Free to use · nothing is stored · sources for every factor

Calculate trees to plant

Enter emissions in tonnes of CO₂e per year.

Quick answer

How many trees does it take to offset 1 tonne of CO₂?

A mature tree takes up roughly 21.8 kg of CO₂ a year (about 48 lb, Arbor Day Foundation), so about 46 mature trees take up one tonne a year. Allowing for 85% survival, that means planting about 54 trees per tonne. Young trees take up much less, and the real figure depends on species, site and age.

Common questions

How much CO₂ does one tree absorb?

A commonly used figure is about 21.8 kg (48 lb) a year for a mature tree, from the Arbor Day Foundation. It varies widely by species, climate and age.

Can planting trees make my company carbon neutral?

Trees can balance part of your remaining emissions, but they take years to mature. Reduce emissions first, then use trees and verified credits for what remains.

Why allow for survival?

Not every sapling survives. Planting extra makes sure enough trees reach maturity.

Are these trees carbon credits?

No. Carbon credits need a project under an approved methodology with independent verification.

About Grow Billion Trees

Planting and caring for trees across India

We plant, geo-tag and look after every tree for three years, for companies, NGOs and families.

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