Something I would like is a tool where I could enter my costs for electricity, natural gas, and efficiency of my boiler and a new heat pump I'm considering. I'

Something I would like is a tool where I could enter my costs for electricity, natural gas, and efficiency of my boiler and a new heat pump I'm considering. I'd like to see if I'm really saving energy (and money) doing this. And how long the payback period is for buying new equipment.