Energy and renewables
Simple payback period
Calculates helper payback period from user-provided investment cost and annual savings.
Related calculators
Energy cost from kWh and price
Calculates energy cost from energy in kWh and price per kWh.
Energy savings
Simple estimate calculator for energy savings as baseline energy minus new energy.
Energy savings percent
Simple estimate calculator for percent energy savings relative to baseline energy.
Simple LCOE
Simple estimate calculator for unit energy cost from total lifetime cost and lifetime energy.
CO2 emission from energy
Simple estimate calculator for CO2 emission from energy and a user-provided emission factor.
Hydro power from head and flow
Simple estimate calculator for hydro power from density, gravity, flow rate, head, and efficiency.