Bitmain 234 TH/s · 3510 W · 15.0 J/TH · released 2024. BTC price and network hashrate pulled live, electricity at four rates.
Collected 22/10/2026. Sources: Binance (BTCUSDT), mempool.space (hashrate), EIA Monthly Energy Review table 9.8 for the US residential rate. Pool fees and hosting fees are not deducted: this is the ceiling.
234 TH/s for 3510 W: the S21 Pro is the most efficient air-cooled miner most buyers can actually order, at 15 J/TH. Bitmain rates it at 234 TH/s typical, plus or minus 3%, and asks for a 4000 W power supply, so the circuit has to be sized above what the miner draws.
| Manufacturer | Bitmain |
| Hashrate | 234 TH/s |
| Power on wall | 3,510 W |
| Efficiency | 15.0 J/TH |
| Energy per day | 84.2 kWh |
| Released | 2024 |
| Noise | 75 dB |
Specification as published by the manufacturer: Bitmain, S21 Pro specification sheet. Rated figures carry a tolerance of a few percent on real units.
| Model | J/TH | kWh/day | Gross/day | Net at $0.07 |
|---|---|---|---|---|
| Antminer S21 Pro | 15.0 | 84 | $8.35 | +$2.45 |
| Antminer S21 | 17.5 | 84 | $7.13 | +$1.25 |
| Whatsminer M60S | 18.5 | 83 | $6.63 | +$0.85 |
| Avalon A1466 | 21.5 | 78 | $5.35 | -$0.08 |
| Antminer S19 Pro | 29.5 | 78 | $3.92 | -$1.54 |
| Antminer S19j Pro | 29.5 | 74 | $3.71 | -$1.44 |
| Antminer S19 | 34.0 | 78 | $3.39 | -$2.07 |
Same network, same day, same formula: only the efficiency in joules per terahash changes the bill. Sorted from the most to the least efficient.
Fifteen joules per terahash buys roughly 17% more output than an S21 for the same power. It does not buy a profitable home setup: at the US residential average the daily bill is still larger than the coins mined.
Keep this number: $0.0991/kWh. Above it, one Antminer S21 Pro burns more electricity than the bitcoin it produces, at the current network hashrate. Compare it with your real tariff, taxes and delivery included.
Gross output = (234 TH/s ÷ network hashrate) × 450 BTC a day × bitcoin price. Power = 3510 W × 24 h. Nothing else: no promised BTC rise, no hidden yield. The network mines 144 blocks a day at 3.125 BTC since April 2024.
Two things this cannot predict: difficulty keeps rising (same machine, less output every month) and the BTC price can fall. A worn unit also hashes below its rated figure.
Buying a machine is the visible cost, but the tariff decides the outcome. The alternative is to have the machine run where the kWh is billed at a professional rate: no room, no noise, no upfront hardware.
Referral code to enter by hand before any purchase: CALCULMINAGE, terms and method on the bonus page.
The calculator accepts any hashrate, any efficiency in W/TH and any tariff. The hashrate tiers answer the same question by power level, and the country pages compare residential rates across Europe.
Nothing here is investment advice. Mining is an asset, not a guaranteed yield: difficulty rises, the BTC price can fall, hardware wears out. Commit only what you can lose entirely.