Bitmain Antminer S21+
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BitmainSHA-256BTC
Antminer S21+ (225Th)
225 TH/s3,712 WAir-cooled
Profit / day
$1.65/day
after power at $0.08/kWh
Efficiency
16.50J/TH
Availability
Priced 1 Oct 2026Ships nowIn stock$2,507.77$11.15/TH
Brand new, 12-month warrantyEverything includedNo setup fees
1
Profitability · SHA-256 · BTC
Is the Antminer S21+ profitable?
Yes. The Bitmain Antminer S21+ (225Th) mines Bitcoin on the SHA-256 algorithm at 225 TH/s, drawing 3,712 W (16.5 J/TH). At $0.08 per kWh it earns about $8.78 a day, spends $7.13 of that on power, and keeps $1.65. That’s around $49 a month, or $602 a year.
It’s #68 of 269 SHA-256 miners on efficiency. It’s an air-cooled unit, released in June 2025.
- Break-even power price
- $0.099/kWh
- Pays for itself in
- ~4.2years
- Daily profit rank
- #114of 533
It makes money below this.
At $2,508, 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
$8.780.000103 BTC
–
0.000024%
$29.0B
+0.9%
QuaiQUAI
$10.67963.83 QUAI
+22%
0.11%
$163k
+6.3%
eCashXEC
$10.171,261,832 XEC
+16%
0.47%
$4.2M
−12.1%
Bitcoin CashBCH
$8.350.0268 BCH
−5%
0.0061%
$158.4M
−7.8%
DigiByte (SHA-256)DGB
$4.541,069 DGB
−48%
0.37%
$2.2M
−4.6%
Paid on top
Fractal BitcoinFB
+<$0.010.000971 FB
+<1%
0.000024%
$328k
−2.7%
NamecoinNMC
+<$0.010.000107 NMC
+<1%
0.000024%
$1Illiquid
+0.4%
HathorHTR
+<$0.010.00964 HTR
+<1%
0.000024%
$111k
+100.7%Highly volatile
ElastosELA
+<$0.010.000107 ELA
+<1%
0.000024%
$167k
+5.0%
Max potential profitUnlikely
+$1.65/day
$1.65 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 | $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 XP+ Hyd (500Th)Newer model | #13 | 11.0 J/TH | $8.94 |
| MicroBT WhatsMiner M61S+ 16.5W (244T) | #66 | 16.5 J/TH | $1.79 |
| Bitmain Antminer S21+ (235T) | #67 | 16.5 J/TH | $1.72 |
| Bitmain Antminer S21+ (225Th)This miner | #69 | 16.5 J/TH | $1.65 |
| Bitmain Antminer S21+ (216Th) | #72 | 16.5 J/TH | $1.58 |
| Bitmain Antminer S19 XP+ Hyd (293T)Earlier model | #90 | 19.0 J/TH | $0.74 |
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.