What does that appliance actually cost to run?

Not a guess. Not a hidden average. Enter watts, time and your own electricity rate — get kWh and money, per day, per month and per year.

✓ Your rate, not ours✓ Duty-cycle for fridges & heaters✓ US $ / UK £✓ No sign-up, no API

Electricity cost calculator

Watts is power — how fast energy is used. Kilowatt-hours is energy — how much is used.

Quick preset — tap one, then adjust watts if yours differs

Power (watts)

Hours per day

Duty cycle % % of time at full power

Days per week

Your electricity rate per kWh — check your bill

Currency

Per day—Enter values above

Per month—30-day equivalent

Per year—Based on days/week

What this excludes: taxes, fixed / daily standing charges, and tiered or time-of-use tariffs — unless your rate already includes them. Nameplate watts are maxima; cycling appliances use less.

Start with the appliance you actually own

🧊 Refrigerator

Use EnergyGuide kWh/year ÷ 12 — not nameplate watts × 24 hours.

Fridge cost per month →

🔥 Space heater

1,500W ≈ 27¢/hour before duty. The thermostat slider changes everything.

Heater cost →

👕 Laundry

Cold vs hot wash is the lever. Heat-pump vs vented dryer, UK vs US kept separate.

Laundry cost per load →

Cost per use — the check most sites skip

A $35 item used 500 times is $0.07/use. A $120 item used 2,000 times is $0.06/use — only if both lifetimes hold. Always test the range. Read the cost-per-use guide →