Energy & Environment

Estimate solar panel system cost, payback period, and 25-year savings with federal tax credit and state incentives.

Calculate your monthly electricity bill by adding appliances and their usage. Find your biggest energy consumers.

Estimate your annual carbon footprint from driving, electricity, flights, and diet. Compare to the US average.

Calculate generator wattage needed based on appliances. Accounts for starting watts on motor loads.

Calculate energy cost for individual appliances. Compare with efficient alternatives to find savings.

Calculate the right HVAC system size (BTU and tonnage) for your home based on square footage and climate.

Compare water heater types (gas, electric, tankless, heat pump) by purchase price and 10-year operating cost.

Calculate rainwater collection potential from your roof. See water bill savings and barrels needed.

Calculate cords of firewood needed for heating season by home size and insulation quality.

Calculate batteries needed for solar backup from daily usage and backup hours needed.

Calculate heat pump size and savings vs gas furnace, electric, or oil heating.

Calculate household daily water usage and monthly cost from habits and household size.

Estimate monthly electric bill from home size, climate, and heating type.

Calculate monthly natural gas bill from therms used and rate.

Calculate propane heating and usage costs with tank size recommendations.

Estimate savings from upgrading to a smart thermostat with payback period.

Calculate monthly water and sewer bill from usage and rates.

Estimate trash and recycling service cost by container and frequency.