Calculation methodology
for CO2 calculator
The Almighty Tree carbon calculator enables you to calculate carbon emissions in everyday life.
We take the emission factors for the calculation from a recognized scientific database and update them frequently.
The module "Travel" calculates carbon emissions resulting from the use of flight, public transport, and cars. For flights, the calculation model includes direct emissions from combustion. For cars, the calculation is carried out with average consumption, fuel type, and car type. For public transportation, the data is collected from CFF and an average (electric/fuel) calculation is made for the bus.
Greenhouse gas emissions resulting from the manufacture of the vehicle are not considered.
The module "Home" calculates carbon emissions to heat houses, offices and warehouses according to the number of users for individuals and globally for companies. In addition, electricity usage is taken into consideration. We use scientific data from Swiss and European sources.
The module "Consumption" calculates carbon emissions based on expenses per year, it includes paper used by companies and food diet for individuals as carbon emissions vary according to people’s diet.
An essential benefit of trees is that they sequester carbon "removal and longterm storage of carbon dioxide (CO2) from our atmosphere".
Almighty Tree estimates that the trees planted sequester CO2 at an average of 260 kg over a tree’s lifetime. We take into consideration the survival rate, the discrepancy between CO2 absorption and tree types as well different lifetime. Thus, a lower average is calculated and selected.
Example of carbon sequestration in tree
The rate of carbon sequestration relies upon the development qualities of the tree species, the thickness of its wood, the area's conditions for development and the plant phase of the tree.
Determine the total (green) weight of the tree
Depending on the tree species,2 a simple algorithm can be applied to weigh any tree species as below
W = Above–ground weight of the tree in pounds
D = Diameter of the trunk in inches
H = Height of the tree in feet
Determine the weight of carbon in the tree
The average carbon content is generally 50% of the tree’s total volume.3 Therefore, in determining the weight of carbon in the tree, multiply the dry weight of the tree by 50%.
Determine the weight of carbon dioxide sequestered in the tree
Chemical composition of CO2 means and that composed of one molecule of Carbon and 2 molecules of Oxygen. The atomic weight of Carbon is 12.001115. The atomic weight of Oxygen is 15.9994. In line with the documentaries of4,5 the weight of CO2 in trees is determined by the ratio of CO2 is C+2*O=43.999915 to C is 43.999915/12.001115=3.6663 therefore, to determine the weight of carbon dioxide sequestered in the tree, multiply the weight of carbon in the tree by 3.6663.
Northeast, maple–beech–birch forests

25 year old forest: 12,000lbs of carbon/25 = 480 lbs of C per acre per year x 44/12 =1,760lbs of CO2per acre per year

120 year old forest: 128,000lbs of carbon/120 = 1,066 lbs of C per year per acre x 44/12 =3,909lbs of CO2 per acre per year

25 year old forest: 1,760lbs of CO2 per acre per year/700 trees = average of 2.52lbs of CO2 per tree per year (rounded to 3 lbs)

120 year old forest: 3,909lbs of CO2 per year per acre = average of 5.58lbs of CO2 per tree per year
Northeast, white and red pine forests

25 year old forest: 67,000 lbs of carbon/25 = 2,680 lbs of C per acre per year x 44/12 = 9,826 lbs of CO2 per acre per year / 700 = average of 14 lbs of CO2 per year per tree (rounded to 15 lbs)

120 year old forest: 246,000 lbs of carbon/120 = 2,050 lbs of C per acre per year x 44/12 = 7,516 lbs of CO2 per acre per year / 700 = average of 11.7 lbs of CO2 per year per tree.
Sources:

Toochi EC. Carbon sequestration: how much can forestry sequester CO2?. Forest Res Eng Int J. 2018;2(3):148150. DOI: 10.15406/freij.2018.02.00040

Sampson N, Hair D. Forests and Global Change: Forest management opportunities for mitigating carbon emissions. USA: American Forests; 1996.