Home Office Electricity Cost Calculator

Running a home office adds to your electricity bill. But by how much? Most people underestimate this cost — and most also overestimate it. The actual number depends on your equipment wattage, hours of use, and your local electricity rate. This calculator gives you a precise monthly and annual figure based on your actual setup.

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Find out exactly how much your home office setup costs to run per month.

Desktop / Laptop Wattage (W)

Monitor(s) Wattage (W)

Desk Lamp / Lighting (W)

Other Devices (webcam, speakers, etc.) (W)

Hours Per Day

Days Per Month

Electricity Rate ($/kWh) — Canadian avg is ~$0.14

Total Wattage

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Monthly Cost

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Annual Cost

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For reference: a typical laptop uses 20-60W, a desktop tower 150-400W (gaming PCs can hit 600W+), and a 27″ monitor 25-50W. Energy-efficient LED desk lamps use 5-12W. The biggest electricity hog in most home offices is not the computer — it is the monitor. Going from a 32″ 4K display (80W) to a 27″ 1440p (35W) saves about $7/month in electricity at Canadian rates.