How much does it cost to run a 65 W work laptop? Remote work power math

How this is calculated

65 W is the typical USB-C / Thunderbolt charger rating for ultrabooks like the 13" MacBook Air, Dell XPS 13, ThinkPad X1, and similar. Actual draw is almost always lower: 10-25 W in normal office work, briefly up to 40-55 W when compiling, transcoding, or running a Teams call with battery saver turned off. A 30 W TDP Mac silicon chip can spend entire workdays averaging 8-12 W, making these machines roughly 5× more efficient than an equivalent gaming PC used for the same tasks.

Verdict

The arithmetic: 65 W at 60% utilization for 8 hours daily at $0.18/kWh consumes 114 kWh annually and costs $20.50 ($1.71 monthly), about the electricity of four laundry loads. The 65 W figure is the typical USB-C / Thunderbolt charger rating for ultrabooks like the 13-inch MacBook Air, Dell XPS 13, and ThinkPad X1, but actual draw sits far below it: 10-25 W in normal office work with brief spikes to 40-55 W during compiles, transcoding, or a heavy Teams call. Apple M-series silicon routinely averages 8-12 W across an entire workday thanks to an 8-15 W TDP, which is why these machines are roughly 5x more efficient than an equivalent-utility gaming PC. The cross-class comparison is the real takeaway: the gap versus a 500 W desktop on the same schedule is ~$130/year, which compounds to ~$390 over a 3-year deployment and is non-trivial for remote workers paying their own electricity.