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MicroBT WhatsMiner M66

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Is the WhatsMiner M66 profitable?

The MicroBT WhatsMiner M66 mines Bitcoin on the SHA-256 algorithm at 280 TH/s, drawing 5,572 W (19.9 J/TH). At $0.08 per kWh it earns about $10.52 a day but spends $10.70 on power, so it loses $0.18 a day. It only makes money if your power costs less than about $0.079 per kWh.

That puts it #230 of 522 on daily profit across every miner we track, and #117 of 262 SHA-256 miners on efficiency. It isn’t in stock with us at the moment. It’s an air-cooled unit, released in November 2023.

Profit at different electricity prices

Same machine, same day, different power bill. Find the row closest to what you pay.

Power pricePower / dayProfit / dayProfit / month
$0.03$4.01$6.50$195
$0.05$6.69$3.83$115
$0.06$8.02$2.49$75
$0.08$10.70-$0.18-$5
$0.10$13.37-$2.86-$86
$0.12$16.05-$5.53-$166
$0.15$20.06-$9.54-$286

Figures updated 16:26 UTC, 25 September 2026, using today’s network difficulty and coin prices. Estimates, not financial advice.