These online calculators can help you estimate the impact of your green efforts:
Greenhouse Gas Equivalencies Calculator
Convert any energy savings measurements into everyday comparisons (e.g., saving 5,000 gallons of gasoline is equivalent to eliminating the energy used to run 4 homes for a year).
Carbon Footprint Calculator
Calculate your carbon footprint from flying, driving, hotel stays, events, and energy usage.
Eco Savings Calculator
Calculate the environmental impact of any printing job.