Energy & Electrical
Energy & Electrical Calculators
Estimate electricity use, charging cost, battery runtime, current, and efficiency savings.
5 tools
Battery Runtime Calculator
Estimate ideal and adjusted battery runtime from capacity, voltage, load, efficiency, and usable depth.
EV Charging Cost Calculator
Estimate energy drawn, per-charge cost, monthly charging cost, and cost per mile for an EV.
Electricity Cost Calculator
Estimate appliance energy use and daily, monthly, and annual electricity cost.
LED Savings Calculator
Compare old and LED lighting energy cost, annual savings, and simple payback period.
Watts to Amps Calculator
Convert watts to amps for DC, single-phase AC, or three-phase AC with voltage and power factor.
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How to use this collection
Choose the calculator that matches the decision you are making. Each tool explains its assumptions and keeps the primary calculation separate from any commercial recommendation.