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MicroBT Whatsminer M21s (56 TH/s)
Outdated · MicroBT · Air-cooled · SHA-256
The MicroBT Whatsminer M21s (56 TH/s) is a air-cooled SHA-256 bitcoin ASIC miner from MicroBT released in Dec 2018. It runs at 56 TH/s while drawing 3,360 W, an efficiency of 60 J/TH. It is more than five years old and no longer competitive; the figures below are kept for reference.
More on this machine: MicroBT Whatsminer M21s profitability history
MicroBT Whatsminer M21s profitability
As of Sep 21, 2026, hosted in Argentina at 6.0¢/kWh with 98.7% uptime. Bitcoin $87,031.
| Period | Bitcoin mined | Revenue | Electricity | Profit |
|---|---|---|---|---|
| Daily | 0.000026 BTC | $2.30 | $5.01 | -$2.71 |
| Weekly | 0.000185 BTC | $16.13 | $35.10 | -$18.97 |
| Monthly | 0.000805 BTC | $70.09 | $152.53 | -$82.45 |
| Yearly | 0.009663 BTC | $840.95 | $1,830.21 | -$989.26 |
Electricity per bitcoin mined: $189,410.
Where to host the MicroBT Whatsminer M21s
| Site | Cooling | Rate | Uptime | Cost per BTC | Profit per month | All-in per unit | Year 1 return |
|---|---|---|---|---|---|---|---|
| UAE | Immersion | 6.0¢ | 99.3% | $189,410 | -$83 | — | — |
| Nigeria | Air-cooled | 3.9¢ | 73.6% | $123,117 | -$22 | — | — |
| Argentina | Air-cooled | 6.0¢ | 98.7% | $189,410 | -$82 | — | — |
MicroBT Whatsminer M21s specifications
| Specification | Value |
|---|---|
| Manufacturer | MicroBT |
| Model | MicroBT Whatsminer M21s |
| Release date | Dec 2018 |
| Algorithm | SHA-256 |
| Hashrate | 56 TH/s |
| Power consumption | 3360 W |
| Efficiency | 60 J/TH |
| Cooling | Air-cooled |
| Weight | 12.5 kg (approx.) |
MicroBT Whatsminer M21s FAQ
Can I buy the MicroBT Whatsminer M21s?
The MicroBT Whatsminer M21s is outdated. Newer models make bitcoin far more cheaply.
Is the MicroBT Whatsminer M21s (56 TH/s) profitable?
As of Sep 21, 2026, hosted in Argentina at 6.0¢/kWh, the MicroBT Whatsminer M21s (56 TH/s) is calculated to lose $2.71 daily, $82.45 monthly and $989.26 yearly after electricity, at a bitcoin price of $87,031. It always changes with bitcoin's price and network difficulty.
What does it cost to mine one bitcoin with the MicroBT Whatsminer M21s?
Electricity to mine one bitcoin with the MicroBT Whatsminer M21s costs about $189,410 in Argentina, and $189,410 in UAE and $123,117 in Nigeria. Bitcoin trades at $87,031, so every coin it mines is made above the price of buying one.
What is the hashrate and power consumption of the MicroBT Whatsminer M21s?
The MicroBT Whatsminer M21s produces 56 TH/s of SHA-256 hashrate and consumes 3,360 W, giving an efficiency of 60 J/TH.
What are the dimensions and weight of the MicroBT Whatsminer M21s?
The MicroBT Whatsminer M21s measures about n/a and weighs around 12.5 kg.
Is the MicroBT Whatsminer M21s air-cooled or hydro-cooled?
The MicroBT Whatsminer M21s is air-cooled with fans. In the UAE we run air-cooled machines in immersion tanks instead, which keeps them cool in desert heat.
Where can the MicroBT Whatsminer M21s be hosted?
We can host the MicroBT Whatsminer M21s in UAE (6.0¢/kWh, 99.3% uptime, immersion), Nigeria (3.9¢/kWh, 73.6% uptime) and Argentina (6.0¢/kWh, 98.7% uptime). The bitcoin it mines goes straight to your own wallet.
When was the MicroBT Whatsminer M21s released?
MicroBT announced the MicroBT Whatsminer M21s in Dec 2018.