Bitmain Antminer S21 Pro
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BitmainSHA-256BTC
Antminer S21 Pro (245T)
245 TH/s3,675 WAir-cooled
Profit / day
$0.26/day
after power at $0.08/kWh
Efficiency
15.00J/TH
Availability
Priced 1 Oct 2026Ships nowIn stock$3,110.63$12.70/TH
Brand new, 12-month warrantyEverything includedNo setup fees
1
Profitability · SHA-256 · BTC
Is the Antminer S21 Pro profitable?
Yes. The Bitmain Antminer S21 Pro (245T) mines Bitcoin on the SHA-256 algorithm at 245 TH/s, drawing 3,675 W (15.0 J/TH). At $0.08 per kWh it earns about $7.32 a day, spends $7.06 of that on power, and keeps $0.26. That’s around $8 a month, or $95 a year.
It’s #52 of 269 SHA-256 miners on efficiency. It’s an air-cooled unit, released in November 2025.
- Break-even power price
- $0.083/kWh
- Pays for itself in
- ~33.3years
- Daily profit rank
- #85of 533
It makes money below this.
At $3,111, if today’s numbers held, so treat this as a rough guide.
Across every miner we track.
Antminer S21 Pro specifications
Other coins it can mine
Mine instead
BitcoinBTCRanked on
$7.320.0000972 BTC
–
0.000028%
$31.0B
−2.0%
QuaiQUAI
$8.691,209 QUAI
+19%
0.32%
$91kLow liquidity
+14.7%
DigiByte (SHA-256)DGB
$8.082,656 DGB
+10%
0.93%
$2.3M
−3.3%
eCashXEC
$8.051,419,919 XEC
+10%
0.56%
$1.6M
−6.2%
Bitcoin SVBSV
$7.310.450 BSV
<1%
0.10%
$6.6M
−2.4%
Bitcoin CashBCH
$7.210.0302 BCH
−1%
0.0074%
$175.1M
−13.7%
Paid on top
Fractal BitcoinFB
+<$0.010.00126 FB
+<1%
0.000029%
$2.4M
−16.8%Volatile
NamecoinNMC
+<$0.010.000105 NMC
+<1%
0.000029%
$0Illiquid
+0.4%
ElastosELA
+<$0.010.000105 ELA
+<1%
0.000029%
$307k
−43.0%Highly volatile
HathorHTR
+<$0.010.00946 HTR
+<1%
0.000029%
$71kLow liquidity
−17.7%Volatile
Max potential profitUnlikely
+$0.26/day
$0.26 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 |
| Bitmain Antminer S23 Hyd (563TH)Newer model | #6 | 9.5 J/TH | $6.54 |
| Bitmain Antminer S21+ Hyd (395T) | #39 | 15.0 J/TH | $0.42 |
| Bitmain Antminer S21+ Hyd (358T) | #40 | 15.0 J/TH | $0.38 |
| Bitmain Antminer S21 Pro (245T)This miner | #43 | 15.0 J/TH | $0.26 |
| Bitmain Antminer S21 Pro (234T) | #44 | 15.0 J/TH | $0.25 |
| Bitmain Antminer S21e Hyd (310T)Earlier model | #118 | 17.0 J/TH | -$0.86 |
More from Bitmain
| Miner | Profit / day |
|---|---|
| Bitmain Antminer Z15 Pro (860K)Equihash | $125.48 |
| Bitmain Antminer Z15 Pro (840K)Equihash | $122.43 |
| Bitmain Antminer Z15K (565kh)Equihash | $81.17 |
| Bitmain Antminer Z15KEquihash | $75.09 |
| Bitmain Antminer Z15Equihash | $60.99 |
Figures updated 00:01 UTC, 10 November 2026, using today’s network difficulty and coin prices. Estimates, not financial advice.