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MicroBT Whatsminer M21 (31 TH/s)
Outdated · MicroBT · Air-cooled · SHA-256
The MicroBT Whatsminer M21 (31 TH/s) is a air-cooled SHA-256 bitcoin ASIC miner from MicroBT released in Mar 2019. It runs at 31 TH/s while drawing 1,860 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 M21 price history · MicroBT Whatsminer M21 profitability history
MicroBT Whatsminer M21 profitability
As of Nov 2, 2026, hosted in Nigeria at 4.5¢/kWh with 73.6% uptime. Bitcoin $77,903.
| Period | Bitcoin mined | Revenue | Electricity | Profit |
|---|---|---|---|---|
| Daily | 0.000010 BTC | $0.76 | $1.55 | -$0.79 |
| Weekly | 0.000068 BTC | $5.30 | $10.87 | -$5.56 |
| Monthly | 0.000296 BTC | $23.05 | $47.22 | -$24.18 |
| Yearly | 0.003550 BTC | $276.53 | $566.63 | -$290.10 |
Electricity per bitcoin mined: $159,628.
MicroBT Whatsminer M21 price history
From $1,407 in Jun 2019 to $101 in Dec 2023 (-93%).
| Month | Price per unit | Price per TH |
|---|---|---|
| Jun 2019 | $1,496 | $48.25 |
| Jul 2019 | $1,331 | $42.92 |
| Aug 2019 | $1,384 | $44.65 |
| Sep 2019 | $812 | $26.20 |
| Oct 2019 | $744 | $24.01 |
| Nov 2019 | $702 | $22.66 |
| Dec 2019 | $761 | $24.55 |
| Jan 2020 | $568 | $18.33 |
| Feb 2020 | $537 | $17.33 |
| Mar 2020 | $493 | $15.91 |
| Apr 2020 | $561 | $18.11 |
| May 2020 | $518 | $16.70 |
| Jun 2020 | $624 | $20.13 |
| Jul 2020 | $594 | $19.16 |
| Aug 2020 | $549 | $17.70 |
| Sep 2020 | $612 | $19.75 |
| Oct 2020 | $737 | $23.77 |
| Nov 2020 | $1,275 | $41.12 |
| Dec 2020 | $1,723 | $55.59 |
| Jan 2021 | $2,081 | $67.14 |
| Feb 2021 | $2,764 | $89.17 |
| Mar 2021 | $2,952 | $95.23 |
| Apr 2021 | $1,955 | $63.08 |
| May 2021 | $1,386 | $44.72 |
| Jun 2021 | $1,536 | $49.54 |
| Jul 2021 | $2,043 | $65.89 |
| Aug 2021 | $2,026 | $65.35 |
| Sep 2021 | $2,119 | $68.34 |
| Oct 2021 | $2,338 | $75.41 |
| Nov 2021 | $2,359 | $76.10 |
| Dec 2021 | $1,822 | $58.79 |
| Jan 2022 | $1,822 | $58.77 |
| Feb 2022 | $1,550 | $49.99 |
| Mar 2022 | $1,422 | $45.87 |
| Apr 2022 | $1,145 | $36.92 |
| May 2022 | $722 | $23.29 |
| Jun 2022 | $648 | $20.90 |
| Jul 2022 | $623 | $20.10 |
| Aug 2022 | $619 | $19.98 |
| Sep 2022 | $515 | $16.60 |
| Oct 2022 | $367 | $11.83 |
| Nov 2022 | $313 | $10.09 |
| Dec 2022 | $282 | $9.09 |
| Jan 2023 | $297 | $9.57 |
| Feb 2023 | $277 | $8.93 |
| Mar 2023 | $272 | $8.78 |
| Apr 2023 | $283 | $9.13 |
| May 2023 | $249 | $8.02 |
| Jun 2023 | $256 | $8.25 |
| Jul 2023 | $252 | $8.12 |
| Aug 2023 | $162 | $5.22 |
| Sep 2023 | $139 | $4.49 |
| Oct 2023 | $133 | $4.28 |
| Nov 2023 | $107 | $3.45 |
| Dec 2023 | $101 | $3.26 |
Where to host the MicroBT Whatsminer M21
| Site | Cooling | Rate | Uptime | Cost per BTC | Profit per month | All-in per unit | Year 1 return |
|---|---|---|---|---|---|---|---|
| UAE | Immersion | 6.5¢ | 99.3% | $230,574 | -$61 | — | — |
| Nigeria | Air-cooled | 4.5¢ | 73.6% | $159,628 | -$24 | — | — |
| Argentina | Air-cooled | 6.5¢ | 98.7% | $230,574 | -$61 | — | — |
MicroBT Whatsminer M21 specifications
| Specification | Value |
|---|---|
| Manufacturer | MicroBT |
| Model | MicroBT Whatsminer M21 |
| Release date | Jun 2019 |
| Algorithm | SHA-256 |
| Hashrate | 31 TH/s |
| Power consumption | 1860 W |
| Efficiency | 60 J/TH |
| Cooling | Air-cooled |
| Weight | 7.1 kg (approx.) |
MicroBT Whatsminer M21 FAQ
Can I buy the MicroBT Whatsminer M21?
The MicroBT Whatsminer M21 is outdated. Newer models make bitcoin far more cheaply.
Is the MicroBT Whatsminer M21 (31 TH/s) profitable?
As of Nov 2, 2026, hosted in Nigeria at 4.5¢/kWh, the MicroBT Whatsminer M21 (31 TH/s) is calculated to lose $0.79 daily, $24.18 monthly and $290.10 yearly after electricity, at a bitcoin price of $77,903. It always changes with bitcoin's price and network difficulty.
What does it cost to mine one bitcoin with the MicroBT Whatsminer M21?
Electricity to mine one bitcoin with the MicroBT Whatsminer M21 costs about $159,628 in Nigeria, and $230,574 in UAE and $230,574 in Argentina. Bitcoin trades at $77,903, so every coin it mines is made above the price of buying one.
What is the hashrate and power consumption of the MicroBT Whatsminer M21?
The MicroBT Whatsminer M21 produces 31 TH/s of SHA-256 hashrate and consumes 1,860 W, giving an efficiency of 60 J/TH.
What are the dimensions and weight of the MicroBT Whatsminer M21?
The MicroBT Whatsminer M21 measures about n/a and weighs around 7.1 kg.
Is the MicroBT Whatsminer M21 air-cooled or hydro-cooled?
The MicroBT Whatsminer M21 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 M21 be hosted?
We can host the MicroBT Whatsminer M21 in UAE (6.5¢/kWh, 99.3% uptime, immersion), Nigeria (4.5¢/kWh, 73.6% uptime) and Argentina (6.5¢/kWh, 98.7% uptime). The bitcoin it mines goes straight to your own wallet.
How has the price of the MicroBT Whatsminer M21 changed?
The MicroBT Whatsminer M21 sold for $1,407 in Jun 2019 and $101 as of Dec 2023, down 93%. Over that time it ranged from $101 to $2,989.
When was the MicroBT Whatsminer M21 released?
MicroBT announced the MicroBT Whatsminer M21 in Mar 2019.