Bitmain Antminer S21 Pro
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BitmainSHA-256BTC
Antminer S21 Pro (234T)
234 TH/s3,510 WAir-cooled
Profit / day
$2.39/day
after power at $0.08/kWh
Efficiency
15.00J/TH
Availability
Priced 1 Oct 2026Ships nowIn stock$2,942.03$12.57/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 (234T) mines Bitcoin on the SHA-256 algorithm at 234 TH/s, drawing 3,510 W (15.0 J/TH). At $0.08 per kWh it earns about $9.13 a day, spends $6.74 of that on power, and keeps $2.39. That’s around $72 a month, or $872 a year.
It’s #53 of 269 SHA-256 miners on efficiency. It’s an air-cooled unit, released in July 2024.
- Break-even power price
- $0.108/kWh
- Pays for itself in
- ~3.4years
- Daily profit rank
- #93of 533
It makes money below this.
At $2,942, if today’s numbers held, so treat this as a rough guide.
Across every miner we track.
Other coins it can mine
Mine instead
BitcoinBTCRanked on
$9.130.000108 BTC
–
0.000025%
$29.0B
+0.9%
QuaiQUAI
$11.691,055 QUAI
+28%
0.15%
$167k
+6.1%
eCashXEC
$10.521,309,542 XEC
+15%
0.48%
$3.3M
−11.8%
Bitcoin SVBSV
$9.350.472 BSV
+2%
0.10%
$5.5M
−8.0%
Bitcoin CashBCH
$8.690.0279 BCH
−5%
0.0064%
$155.8M
−6.8%
DigiByte (SHA-256)DGB
$8.191,921 DGB
−10%
0.67%
$2.2M
−3.9%
Paid on top
Fractal BitcoinFB
+<$0.010.00106 FB
+<1%
0.000026%
$327k
−2.5%
NamecoinNMC
+<$0.010.000112 NMC
+<1%
0.000026%
$1Illiquid
+0.4%
HathorHTR
+<$0.010.0100 HTR
+<1%
0.000026%
$113k
+103.9%Highly volatile
ElastosELA
+<$0.010.000112 ELA
+<1%
0.000026%
$164k
+3.7%
Max potential profitUnlikely
+$2.39/day
$2.39 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 | $24.09 |
| Bitdeer SealMiner A4 Ultra Hydro | #2 | 9.4 J/TH | $18.48 |
| Bitmain Antminer S23e Hyd U2H (865T) | #3 | 10.0 J/TH | $17.13 |
| Bitmain Antminer S23e Hyd 2U (865Th) | #4 | 10.0 J/TH | $17.13 |
| Bitmain Antminer S21+ Hyd (395T) | #38 | 15.0 J/TH | $4.03 |
| Bitmain Antminer S21+ Hyd (358T) | #40 | 15.0 J/TH | $3.65 |
| Bitmain Antminer S21 Pro (245T) | #58 | 15.0 J/TH | $2.50 |
| Bitmain Antminer S21 Pro (234T)This miner | #59 | 15.0 J/TH | $2.39 |
| Bitmain Antminer S19j XP (151Th)Earlier model | #144 | 21.5 J/TH | -$0.34 |
| Bitmain Antminer S19 Pro++Newer model | #161 | 26.0 J/TH | -$1.36 |
More from Bitmain
| Miner | Profit / day |
|---|---|
| Bitmain Antminer Z15 Pro (860K)Equihash | $48.00 |
| Bitmain Antminer Z15 Pro (840K)Equihash | $46.76 |
| Bitmain Antminer X9 (1M)RandomX | $33.98 |
| Bitmain Antminer Z15K (565kh)Equihash | $30.27 |
| Bitmain Antminer Z15KEquihash | $27.79 |
Figures updated 14:03 UTC, 3 October 2026, using today’s network difficulty and coin prices. Estimates, not financial advice.