The following calculators can help you to quantify the benefits of green products.

EnviroCalc - Environmental Benefits and Cost Savings Calculator for Purchasers  

Created by the Commonwealth of Massachusetts, EnviroCalc is a downloadable spreadsheet-based tool designed to estimate the environmental benefits of purchases of recycled-content and energy efficient products in a single tool. One of the advantages is that all the calculations are based on reporting information that is easily obtained from product suppliers. 

Energy Star Calculators

The Energy Star website contains a number of calculators created to estimate the potential savings and payback period for purchases of energy efficient products.

Environmental Benefits Calculator

The Northeast Recycling Council, Inc. (NERC) developed this Calculator as an easy-to-use means of generating estimates of the environmental benefits of a study area, based on the tonnages of materials that are source reduced, reused, recycled, landfilled, or incinerated (includes waste-to-energy). The Calculator can be used to educate the public, legislators and others about these benefits, assist state and municipal employees to better understand the impacts of their waste management programs, support market development efforts, and to increase the public's understanding of source reduction, reuse and recycling as a sustainable environmental strategy.

Electronics Environmental Benefit Calc (1.66 MB)

Assists in quantifying the benefits of environmentally sound management of electronic equipment. The Calculator estimates the environmental and economic benefits of purchasing EPEAT-registered products, in addition to improvements in equipment operation and end-of-life management practices. To learn more about its use and development, visit here.

HEV Cost Calculator Tool

This calculator, developed with the help of the US Department of Energy, allows fleets to evaluate the full costs and benefits of a hybrid electric vehicle (HEV) in comparison to a conventional vehicle. Fleets also may use the tool to determine the cost and benefits of a fleet of HEVs versus a fleet of conventional vehicles.

Paper Calculator

The paper calculator, created by the Environmental Defense Fund, shows the environmental impacts of different papers across their full lifecycle.

WaterSense 

Use this simple calculator, created by the EPA to estimate how much water you can save by installing WaterSense labeled products in your home or apartment building.

Emissions Calculator

Calculate how much pollution is caused by the energy used in your home or business. Just enter your monthly energy bill and answer a few questions, and the calculator displays emissions information including greenhouse gases, smog-forming gases and toxic materials.

Emissions Reductions Calculator

Enter your estimated annual electricity and natural gas savings and answer a few questions about your building, and the calculator will display the emissions prevented by your actions and the annual savings that result.