Environmental Calculators

Air Quality Index (AQI) Calculator

Calculate the Air Quality Index from pollutant concentrations using EPA breakpoints. Supports PM2.5, PM10, ozone, CO, SO2, and NO2 with category labels and health guidance.

Energy Star Savings Calculator

Estimate annual energy and cost savings from Energy Star appliances versus standard models. Enter appliance type and count to see savings over time.

Green Building Energy Calculator

Estimate annual energy savings and payback periods from common green building upgrades. Enter home size and current energy bill to compare LED lighting, insulation, and more.

Land Use Calculator

Convert land area between acres, hectares, square miles, and square kilometers. Estimate agricultural yield, carbon sequestration, and solar power potential for any land area.

Methane Emissions Calculator — Livestock

Estimate annual methane emissions from livestock using IPCC Tier 1 emission factors. Converts to CO2-equivalent using both 20-year and 100-year global warming potentials.

Sustainability Score Calculator

Score your lifestyle sustainability across diet, transportation, home energy, and consumption. Get a personal score out of 100 and an estimated annual CO2 footprint in tonnes.

Vegan vs Omnivore Carbon Footprint

Compare the annual carbon footprint of vegan, vegetarian, and omnivore diets. Based on kg CO2e per kg of food with servings per week inputs for each food category.

Zero Waste Calculator — Diversion Rate

Calculate your household waste diversion rate from landfill. Enter weekly waste by category and see how much is recycled, composted, or landfilled with CO2 savings.

LED Lighting Upgrade Savings Calculator

Calculate LED savings from current bulb type, count, and usage hours. Returns annual savings, payback period, and 10-year ROI from switching to LED.

Phantom Load (Standby Power) Cost Calculator

Calculate the annual cost of standby power from TVs, chargers, and gaming consoles. Find how much your electronics cost while turned off or in standby mode.

OSHA Noise Dose and TWA Calculator

Calculate noise exposure dose and TWA using OSHA standards. Returns permissible exposure time at any sound level and hearing protection requirements.

Tree Carbon Sequestration Calculator

Estimate carbon sequestered by trees from species, size, and age. Calculate CO2 offset, carbon credits, and the environmental value of trees and forests.

Composting CO2 Savings Calculator

Calculate how much CO2 and methane you prevent by composting food and garden waste. Compare landfill versus composting greenhouse gas emissions per year.

Lifetime Plastic Bag Impact Calculator

Calculate how many plastic bags you use per year and over your lifetime, and the environmental cost in oil, CO2, and landfill waste.

Travel Carbon Footprint Calculator

Calculate CO2 emissions for any trip by mode of transport. Compare flying, driving, train, and bus per passenger. Flights typically emit 10x more than rail.

Electric Vehicle vs Gas Car Savings Calculator

Compare total ownership cost and CO2 emissions of an EV versus a gas car over 1 to 10 years. Factors in fuel, electricity, maintenance, and price difference.

Food Carbon Footprint Calculator

Calculate CO2 emissions from your weekly diet by food type and frequency. Compare beef, chicken, fish, dairy, and vegetables with annual footprint.

Home Carbon Footprint Calculator

Calculate your home's annual CO2 emissions from electricity, gas heating, and car use. Enter monthly usage to see your carbon footprint in tons per year.

Personal Water Footprint Calculator

Calculate your daily water footprint from showers, laundry, diet, and household habits. Compare your usage to the 80-100 gallon US daily average per person.

Recycling Environmental Impact Calculator

Calculate CO2 and energy saved by recycling paper, plastic, glass, aluminum, and steel. See your annual environmental impact in pounds and kilowatt hours.

Tree Planting Carbon Offset Calculator

Calculate how many trees to plant to offset your annual CO2 emissions. Select tree species and growth rate for a targeted, accurate carbon offset result.

Ecological Footprint Calculator

Calculate how many Earths we would need if everyone lived like you. Estimate your ecological footprint based on your daily habits.

Heat Pump Savings Calculator

Calculate how much you can save by switching to a heat pump. Compare costs vs gas furnace, oil, or electric resistance heating.

Solar Panel Payback Calculator

Calculate how many years until solar panels pay for themselves. Enter system cost, energy production, and electricity rate.

Wind Turbine Noise Calculator

Estimate wind turbine noise in decibels at any distance. Uses the inverse square law to model sound attenuation for planning and compliance checks.

Wind Turbine Power Output Calculator

Calculate wind turbine power using P = ½ρAv³ from blade diameter, wind speed, and air density. Returns kilowatts and annual energy generation estimate.

CO2 Emissions per Mile/km Calculator

Calculate CO2 emissions per mile or kilometer by vehicle type and fuel type. Understand your carbon footprint from driving.

CO2 in Room Calculator

Estimate CO2 levels in a room based on volume, occupants, and ventilation rate. Check if your indoor air quality is healthy.

Solar Panel Output Calculator

Calculate how much electricity your solar panels will produce per day, month, and year. Enter panel wattage, sun hours, and efficiency.