Calculating Carbon Purchases

Here’s an example calculation of how we use your gas purchases to buy carbon credits:
  
      Step
      Example
      Source
      
      Gas Purchased
      $63.80
      Credit card charge (via Plaid)
      
      Dollars per gallon
      $3.19
      Current average in state of residence or purchase

American Automobile Association (AAA)

      Est. Gallons
      20 gal
      = $63.80 gas purchase / ($3.19/gallon)
Credit card charge/dollars per gallon
      
      Total Emissions (CO2e)
      178 kg
      = 20 gallons * 8.887 kg/gallon
U.S. Environmental Protection Agency avg. of 8.9 kg CO2/gallon of gasoline
      
      Carbon credit price
      $0.02/kg CO2 removed or avoided
      Pricing based on our project portfolio
(this example is equal to $20/ton)
      
      Carbon credit total
      $3.56
      = 178 kg * $0.02/kg
(purchased by OffsetC on your behalf)
      
      Administrative fee
      $0.36
      10% of carbon credit purchase
      
      Credit card fee
      $0.40
      = $0.30 + 0.029*($3.56)
Flat $0.30/transaction + 2.9% of carbon credit purchase (from Stripe)
      
      Total
      $4.32
      = $3.56 + $0.36 + $0.40
      
      Total % gas purchase
      6.8%
      = $4.32/$63.80