Guide
Best energy monitors for appliance electricity use
Energy monitors are the fastest way to move from an estimate to a real number. They are especially useful for always-on appliances, cooling devices, fridges, wine coolers, chargers, and gaming setups.
Short answer
If you want to validate calculator estimates before buying or replacing anything, start here. A plug-in monitor is often the best first purchase because it tells you whether the appliance is actually expensive enough to deserve further action.