Standby power cost
Calculate the annual energy use (kWh) and cost of electronics left on standby 24/7.
Open calculatorLED bulb swap savings
Energy saved (kWh) = (old bulb watts − LED watts) × operating hours / 1,000. Multiplies by your kWh rate to show financial savings.
W
W
Money saved
47 zł
Energy saved
52 kWh
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Match brightness in lumens (lm): replacing a classic 60 W incandescent bulb requires an LED producing roughly 800 lumens (typically 7–9 W).
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Educational estimate only. Not medical, tax, legal or financial advice.