Bitmain Antminer S21+
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BitmainSHA-256BTC
Antminer S21+ (235T)
235 TH/s3,877 WAir-cooled
Profit / day
-$0.43/day
after power at $0.08/kWh
Efficiency
16.50J/TH
Availability
Priced 1 Oct 2026Ships nowIn stock$2,624.14$11.17/TH
Brand new, 12-month warrantyEverything includedNo setup fees
1
Profitability · SHA-256 · BTC
Is the Antminer S21+ profitable?
Not at $0.08 per kWh. The Bitmain Antminer S21+ (235T) mines Bitcoin on the SHA-256 algorithm at 235 TH/s, drawing 3,877 W (16.5 J/TH). At $0.08 per kWh it earns about $7.02 a day but spends $7.44 on power, so it loses $0.43 a day.
It’s #69 of 269 SHA-256 miners on efficiency. It’s an air-cooled unit, released in June 2024.
- Break-even power price
- $0.075/kWh
- Daily profit rank
- #208of 533
It only makes money below this.
Across every miner we track.
Antminer S21+ specifications
Other coins it can mine
Mine instead
BitcoinBTCRanked on
$7.020.0000933 BTC
–
0.000027%
$31.0B
−2.0%
QuaiQUAI
$8.361,158 QUAI
+19%
0.30%
$90kLow liquidity
+14.8%
eCashXEC
$7.681,362,438 XEC
+10%
0.54%
$2.7M
−6.5%
Bitcoin CashBCH
$6.850.0288 BCH
−2%
0.0069%
$140.1M
−13.9%
DigiByte (SHA-256)DGB
$4.971,647 DGB
−29%
0.58%
$2.3M
−4.1%
Paid on top
Fractal BitcoinFB
+<$0.010.00119 FB
+<1%
0.000028%
$2.4M
−19.0%Volatile
NamecoinNMC
+<$0.010.000101 NMC
+<1%
0.000028%
$0Illiquid
+0.4%
ElastosELA
+<$0.010.000101 ELA
+<1%
0.000028%
$311k
−38.1%Highly volatile
HathorHTR
+<$0.010.00907 HTR
+<1%
0.000028%
$69kLow liquidity
−17.1%Volatile
Max potential profitUnlikely
-$0.43/day
-$0.43 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 S21+ (216Th) | #97 | 16.5 J/TH | -$0.39 |
| Bitmain Antminer S21+ (225Th) | #98 | 16.5 J/TH | -$0.41 |
| Bitmain Antminer S21+ (235T)This miner | #101 | 16.5 J/TH | -$0.43 |
| MicroBT WhatsMiner M61S+ 16.5W (244T) | #103 | 16.5 J/TH | -$0.44 |
| Bitmain Antminer S19j XP (151Th)Newer model | #147 | 21.5 J/TH | -$1.73 |
| Bitmain Antminer S19K Pro (120T)Earlier model | #205 | 29.0 J/TH | -$3.10 |
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.