These online calculators can help you estimate the impact of your green efforts:

Bottled Water Cost Calculator
www.newdream.org/water/calculator.php
Calculate the cost savings and environmental impact of reducing individual water bottle usage.

Environmental Calculator
www.neenahpaper.com
Calculate the environmental savings associated with switching to recycled paper.

Greenhouse Gas Equivalencies Calculator
www.epa.gov/cleanenergy/energy-resources/calculator.html
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
sustainabletravelinternational.org/documents/op_carboncalcs.html
Calculate your carbon footprint from flying, driving, hotel stays, events, and energy usage.

Eco Savings Calculator
www.widgetbox.com/widget/eco-calculator
Calculate the environmental impact of any printing job.