Biomass Energy Calculator
Calculate the energy output from burning biomass fuels. Enter mass, heat value, and boiler efficiency to estimate usable thermal energy in kWh or BTU.
Free Renewable Calculators
8 toolsGeothermal, biomass, hydro, CHP, and renewable energy calculators. Browse our free renewable tools below — no sign-up required.
CHP Efficiency Calculator
Calculate the overall efficiency of a Combined Heat and Power (cogeneration) system. Compare CHP thermal plus electrical efficiency to separate generation.
Geothermal Heat Pump Savings Calculator
Calculate annual savings from a geothermal heat pump vs conventional HVAC. Compare operating costs for heating and cooling with ground-source heat pumps.
Geothermal Installation ROI Calculator
Calculate the return on investment and payback period for a geothermal heat pump installation. Factor in incentives, energy savings, and system lifespan.
Grid Parity Calculator
Determine when a renewable energy source reaches grid parity. Compare the levelized cost of renewable energy (LCOE) to retail electricity rates.
Micro-Hydro Power Output Calculator
Calculate the power output of a micro-hydro system from water flow rate, head height, and turbine efficiency. Plan small-scale hydroelectric installations.
REC Value Calculator
Calculate the cost of Renewable Energy Certificates (RECs) to offset your electricity with renewable energy. Estimate your green energy premium.
Renewable Energy Percentage Calculator
Calculate what percentage of your energy comes from renewable sources. Track your renewable energy mix and progress toward sustainability goals.