Environmental Calculators
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The calculators provided on this page help you identify problems and solutions, and as a result your organization’s ability to compete.

  • This worksheet will calculate the amount of money you spend on fuel for your commute, how much each passenger should contribute to the fuel cost, and how much money you save by ridesharing.
  • This downloadable calculator estimates the environmental benefits of improving the purchasing, use and disposal of computer products; specifically computer desktops, liquid crystal display (LCD) and cathode ray tube (CRT) monitors and computer notebooks/laptops. The calculator also calculates the benefits of mobile phone reuse and recycling, and of recycling mixed loads of electronic equipment.
  • The energy and cost calculators allow companies to enter their own input values (e.g., utility rates, hours of use, etc.) to estimate energy and cost savings for energy-efficient products for lighting, commercial and industrial equipment, equipment for food service, and office equipment.
  • This worksheet will convert the entered quantity from the chosen units into carbon dioxide equivalent (CO2e) emissions.
  • EPA's National Stormwater Calculator (SWC) is a desktop application that estimates the annual amount of rainwater and frequency of runoff from a specific site anywhere in the United States. It is designed to be used by anyone interested in reducing runoff from a property.
  • EPA’s stormwater regulations allow NPDES permitting authorities to waive NPDES permitting requirements for stormwater discharges from small construction sites (disturbing less than 5 acres) if the value of the rainfall erosivity factor (“R” in the Revised Universal Soil Loss Equation or RUSLE) is less than 5 during the period of construction activity.
  • If you are the owner or operator of a Spill Prevention, Control, and Countermeasure (SPCC) qualified facility, you need to ensure that you have adequate secondary containment to prevent oil spills from reaching navigable water. Use this link to access example and blank worksheets to calculate secondary containment capacity.
  • This series of worksheets will convert the entered quantity from the chosen units to other common units of mass, length, area, volume, pressure, and temperature.
  • WARM can help solid waste planners and organizations track and voluntarily report greenhouse gas (GHG) emissions reductions and energy savings from several different waste management practices. Use this worksheet to describe the baseline and alternative municipal solid waste (MSW) management scenarios that you want to compare.