MicroBT Whatsminer M21
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MicroBTSHA-256BTC
Whatsminer M21
31 TH/s1,860 WAir-cooled
Profit / day
-$2.65/day
after power at $0.08/kWh
Efficiency
60.00J/TH
Availability
Not stockedWe don’t carry this model. Ask and we’ll try to source one.—
Profitability · SHA-256 · BTC
Is the Whatsminer M21 profitable?
Not at $0.08 per kWh. The MicroBT Whatsminer M21 mines Bitcoin on the SHA-256 algorithm at 31 TH/s, drawing 1,860 W (60.0 J/TH). At $0.08 per kWh it earns about $0.93 a day but spends $3.57 on power, so it loses $2.65 a day.
It’s #213 of 269 SHA-256 miners on efficiency. It isn’t in stock with us at the moment. It’s an air-cooled unit, released in August 2019.
- Break-even power price
- $0.021/kWh
- Daily profit rank
- #379of 533
It only makes money below this.
Across every miner we track.
Whatsminer M21 specifications
Other coins it can mine
Mine instead
BitcoinBTCRanked on
$0.930.0000123 BTC
–
0.0000035%
$31.0B
−2.0%
QuaiQUAI
$1.11153.21 QUAI
+19%
0.04%
$90kLow liquidity
+14.8%
eCashXEC
$1.02180,573 XEC
+10%
0.07%
$2.7M
−6.5%
Bitcoin CashBCH
$0.900.00380 BCH
−2%
0.00091%
$140.1M
−13.9%
DigiByte (SHA-256)DGB
$0.66218.37 DGB
−29%
0.08%
$2.3M
−4.1%
Paid on top
Fractal BitcoinFB
+<$0.010.000157 FB
+<1%
0.0000037%
$2.4M
−19.0%Volatile
NamecoinNMC
+<$0.010.0000133 NMC
+<1%
0.0000037%
$0Illiquid
+0.4%
ElastosELA
+<$0.010.0000133 ELA
+<1%
0.0000037%
$311k
−38.1%Highly volatile
HathorHTR
+<$0.010.00120 HTR
+<1%
0.0000037%
$69kLow liquidity
−17.1%Volatile
Max potential profitUnlikely
-$2.65/day
-$2.65 BTC profit + <$0.01 paid on top
How it compares · SHA-256 miners
| Miner | Rank | Efficiency | Profit / day |
|---|---|---|---|
| Bitmain Antminer S23 Hyd 3U (1.16 PH) | #1 | 9.5 J/TH | $13.48 |
| Bitdeer SealMiner A4 Ultra Hydro | #2 | 9.4 J/TH | $10.38 |
| Bitmain Antminer S23e Hyd U2H (865T) | #3 | 10.0 J/TH | $9.22 |
| Bitmain Antminer S23e Hyd 2U (865Th) | #4 | 10.0 J/TH | $9.22 |
| MicroBT Whatsminer M21This miner | #184 | 60.0 J/TH | -$2.65 |
| MicroBT Whatsminer M30SNewer model | #228 | 38.0 J/TH | -$3.71 |
| MicroBT Whatsminer M20SEarlier model | #245 | 49.4 J/TH | -$4.42 |
| Innosilicon T3 50T | #246 | 62.0 J/TH | -$4.46 |
| Innosilicon T3+ 57T | #251 | 57.9 J/TH | -$4.63 |
| MicroBT Whatsminer M21S | #254 | 60.0 J/TH | -$4.78 |
More from MicroBT
| Miner | Profit / day |
|---|---|
| MicroBT WhatsMiner M7AS+SHA-256 | $3.52 |
| MicroBT WhatsMiner M7DSSHA-256 | $2.64 |
| MicroBT WhatsMiner M73S+SHA-256 | $2.30 |
| MicroBT WhatsMiner M79SSHA-256 | $1.91 |
| MicroBT WhatsMiner M76S+SHA-256 | $1.66 |
Figures updated 00:01 UTC, 10 November 2026, using today’s network difficulty and coin prices. Estimates, not financial advice.