Antminer S21 XP profitability
The S21 XP is the most efficient air-cooled Antminer on this list at 13.5 J/TH, pushing 270 TH/s from 3,645 W. That efficiency is why it keeps a margin at power prices where older machines are underwater.
- Hashrate: 270 TH/s
- Power: 3,645 W
- Efficiency: 13.5 J/TH
- Source: Bitmain spec sheet, accessed October 21, 2026.
Daily profit by power price
At the hashprice below, one Antminer S21 XP grosses about $10.28 a day. At $0.05/kWh it nets about $5.91 a day, and it breaks even at about $0.118/kWh.
| Power price | Revenue / day | Power / day | Profit / day | Profit / 30 days |
|---|---|---|---|---|
| $0.03 | $10.28 | $2.62 | $7.66 | $230 |
| $0.04 | $10.28 | $3.50 | $6.78 | $203 |
| $0.05 | $10.28 | $4.37 | $5.91 | $177 |
| $0.06 | $10.28 | $5.25 | $5.03 | $151 |
| $0.07 | $10.28 | $6.12 | $4.16 | $125 |
| $0.08 | $10.28 | $7.00 | $3.28 | $99 |
| $0.09 | $10.28 | $7.87 | $2.41 | $72 |
| $0.10 | $10.28 | $8.75 | $1.53 | $46 |
Hashprice $0.0381 per TH/s per day, computed October 21, 2026 at 19:27 UTC from the mempool.space API: BTC $84,714, difficulty 140.58 T, average reward 3.1415 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 Pro · Antminer S21 · Antminer S19 XP · Antminer S19k Pro, or see all ASICs.