Antminer S21 Pro profitability
The S21 Pro sits between the S21 and the S21 XP: 234 TH/s at 3,510 W, or 15 J/TH. It draws almost the same power as a plain S21 but hashes 17% more.
- Hashrate: 234 TH/s
- Power: 3,510 W
- Efficiency: 15 J/TH
- Source: Bitmain spec sheet, accessed October 21, 2026.
Daily profit by power price
At the hashprice below, one Antminer S21 Pro grosses about $8.91 a day. At $0.05/kWh it nets about $4.69 a day, and it breaks even at about $0.106/kWh.
| Power price | Revenue / day | Power / day | Profit / day | Profit / 30 days |
|---|---|---|---|---|
| $0.03 | $8.91 | $2.53 | $6.38 | $191 |
| $0.04 | $8.91 | $3.37 | $5.54 | $166 |
| $0.05 | $8.91 | $4.21 | $4.69 | $141 |
| $0.06 | $8.91 | $5.05 | $3.85 | $116 |
| $0.07 | $8.91 | $5.90 | $3.01 | $90 |
| $0.08 | $8.91 | $6.74 | $2.17 | $65 |
| $0.09 | $8.91 | $7.58 | $1.32 | $40 |
| $0.10 | $8.91 | $8.42 | $0.48 | $14 |
Hashprice $0.0381 per TH/s per day, computed October 21, 2026 at 20:50 UTC from the mempool.space API: BTC $84,647, difficulty 140.58 T, average reward 3.1420 BTC per block over the last 144 blocks. Revenue is gross: no pool fee, downtime, hosting markup or hardware cost. Assumes the machine runs at spec 24 hours a day (our assumption). Figures update when the site is rebuilt.
Open the ASIC calculator
Wondering whether the same kilowatts would earn more renting GPUs? Try the mine vs AI per-kW calculator. Other models: Antminer S21 XP · Antminer S21 · Antminer S19 XP · Antminer S19k Pro, or see all ASICs.