Calculators

Estimate monthly heating cost based on home size, heating usage, energy price, insulation quality, and local climate severity.

Estimate the recommended radiator heat output for a room in watts based on room dimensions, insulation quality, and window type.

Estimate the recommended mini split capacity in BTUs based on room size, ceiling height, insulation quality, climate zone, and sun exposure.

Estimate recommended heat pump capacity based on home size, insulation quality, climate severity, ceiling height, and window efficiency.

Estimate recommended furnace output in BTU/hr based on home size, ceiling height, climate severity, insulation quality, and home age.

Estimate the cooling capacity needed for a room in BTUs per hour based on room size, ceiling height, sun exposure, number of occupants, and appliance heat load.

Estimate the recommended air conditioner capacity based on room size, ceiling height, sun exposure, climate, and occupancy. Result is shown in BTU/hour.

Estimate recommended HVAC cooling capacity based on home size, ceiling height, climate, insulation quality, and sun exposure. Result is shown in tons of cooling capacity.

Estimate monthly cooling cost based on air conditioner power draw, daily usage, electricity rate, cooling system efficiency, and climate intensity.

Estimate building heat loss in watts using floor area, insulation level, indoor-outdoor temperature difference, ceiling height, and air tightness. This simplified calculator applies area-based transmission loss with adjustments for building volume and infiltration.

Estimate the annual solar energy production for a residential solar panel system based on system size, average peak sun hours, panel efficiency factor, shading, and performance ratio.

Estimate a home’s annual carbon footprint based on electricity use, natural gas use, household size, home size, and heating fuel type. The result is an estimated annual total in metric tons of CO2e.

Estimate how long a battery backup system can power your devices based on battery size, battery voltage, inverter efficiency, and total load.

Estimate the recommended generator size in kilowatts for a whole-house backup generator based on home size, central air load, major electric appliances, and desired safety margin.

Estimate the recommended home generator size in kilowatts based on running load, starting surge load, reserve capacity, voltage, and fuel type.

Estimate the recommended solar battery capacity based on daily energy use, desired backup duration, depth of discharge, system voltage, and battery chemistry.

Estimate the scale size of the Solar System model by calculating the compressed distance from the Sun to Neptune based on a chosen Sun diameter and unit conversion.

Estimate your annual and first-year savings from installing a home solar system based on electricity usage, utility rates, available sunlight, system offset, and installation cost after incentives.

Estimate how many solar panels are needed based on monthly electricity usage, average daily sun hours, panel wattage, and system loss factor.

Estimate a household’s total daily water use based on residents, shower habits, toilet flushing, laundry loads, and dishwasher cycles.

Estimate your home’s monthly electricity cost based on usage, local utility rate, home size, climate impact, and heating system efficiency.

Estimate a monthly water bill based on water usage, sewer charges, fixed service fees, meter size, and stormwater fees.

Estimate monthly natural gas usage and cost based on appliance input, daily usage, billing days, gas energy content, and utility rate.

Estimate a monthly gas bill based on usage, unit rate, daily standing charge, billing days, and VAT.

Estimate monthly household electricity usage in kilowatt-hours based on average daily use of lighting and electronics, refrigerator consumption, air conditioning runtime, and the number of days in the month.

Estimate the electricity cost of running a household appliance based on power usage, hours of use, usage frequency, electricity rate, and time period.

Estimate a monthly electricity bill based on energy usage, billing days, base service charge, delivery charge, and taxes/fees.

Estimate electricity cost based on appliance power, daily usage, number of days, electricity rate, and quantity of devices.

Estimate monthly household electricity usage based on home size, occupancy, HVAC efficiency, daily appliance use, and climate zone.

Estimate the total cost to install or replace baseboards based on room perimeter, material type, baseboard height, labor complexity, and number of outside corners.