Calculators Blog About Contact

60 free micro-calculators for batteries, solar, EV charging, and home power. Instant answers—no account required.

Categories

Convert
Battery
Power
Solar
EV Charging
Appliances
Battery Sizing
Cost
Backup

Company

About
Blog
Contact

Legal

Privacy Policy
Terms of Service

© 2026 WattQuick. All calculators are estimates—for planning only, not professional engineering advice.

All calculators

Appliance

Appliance Monthly Energy

Convert appliance watts and daily use into monthly kWh.

Power drawW

Hours per dayhrs

Monthly energy use

Enter watts and hours per day

Share this calculator

About Appliance Monthly Energy

Monthly kWh formula

Monthly kWh = (watts × hours per day × 30) ÷ 1000. Adjust the 30-day factor if you prefer 365÷12 for an average month.

Stack your loads

Run this for each major appliance and sum the results to estimate household consumption before sizing solar or batteries.

Related calculators

More tools in this category and beyond

Appliance
Appliance Daily Cost
Open
Solar
Solar Daily Yield
Open
Solar
Solar Panel Size
Open
Appliance
Energy Consumption Calculator
Open