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| Daily | Monthly | Yearly | |
|---|---|---|---|
 Income
|
$11.63 | $348.97 | $4,245.78 |
 Electricity
|
-$6.44 | -$193.32 | -$2,352.06 |
 Profit
|
$5.19 | $155.65 | $1,893.72 |
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Contact UsCalculate Antminer S21+ Hydro profitability, daily earnings, electricity costs and ROI. Compare Bitcoin mining revenue and estimate long-term returns before investing.
Antminer S21+ Hydro is manufactured by Bitmain which operates under the SHA-256 algorithm with a maximum hashrate of 319Th/s and power consumption of 4785W.
| Manufacturer | Bitmain |
|---|---|
| Model | Antminer S21+ Hyd |
| Size w/o | 339 X 173 X 207mm |
| Size with | 570 X 316 X 430mm |
| Weight Net | 13800g |
| Noise level | 50db |
| Voltage | 380-415V |
| Coolant Flow, L/min | 8.0~10.0 |
| Coolant pressure, bar | ≤3.5 |
| Coolant PH value | Antifreeze: 7.0~9.0 Prue water: 6.5~7.5 Deionized water：8.5~9.5 |
| Working coolant | Antifreeze/ Pure water/Deionized water |
| Power | 4785W |
| Interface | Ethernet |
| Storage Temp. | -20-70 |
| Temperature | 20 - 50 °C |
| Humidity | 10 - 90 % |
| Warranty | 365 Days |
The Bitmain Antminer S21+ Hydro profitability calculator helps miners estimate potential earnings based on hashrate, electricity costs and current Bitcoin mining conditions. With a maximum hashrate of 358TH/s and SHA-256 algorithm support, the Antminer S21+ Hydro is designed for miners seeking efficient Bitcoin mining performance. Daily profit, monthly revenue and annual earnings can vary depending on network difficulty, Bitcoin price and operational expenses.
Before purchasing any ASIC miner, evaluating profitability is essential for understanding return on investment. The Antminer S21+ Hydro ROI calculator provides insight into electricity consumption, mining rewards and overall operating costs. By reviewing estimated revenue and expenses, miners can determine whether this hydro-cooled Bitcoin miner aligns with their mining goals and profitability expectations.
The Bitmain Antminer S21+ Hydro runs the SHA-256 algorithm at 358 TH/s while drawing 5,370 W from the wall. Those two numbers combine into an efficiency of 15.0 J/TH, and efficiency is the figure that matters most when electricity is your main running cost. The fewer joules the machine spends per terahash, the more of its revenue survives the power bill.
This is a hydro model, so it uses liquid cooling and is meant for a water cooled installation rather than a standard air cooled setup. The unit weighs 13.8 kg. Together, hashrate, power draw and efficiency set the baseline for the earnings shown in the calculator above.
At 5,370 W the S21+ Hydro consumes about 128.9 kWh of electricity per day. If you pay $0.05 per kWh, running it costs $6.45 a day. At $0.10 per kWh the same machine costs $12.89 a day, so your power rate alone can move daily profit by several dollars.
Revenue is the other half of the equation, and it changes with Bitcoin network conditions such as price and difficulty. Enter your own electricity rate in the calculator above to see current earnings, running cost and net profit for your exact situation.
Bitmain announced the S21+ Hydro on 10 November 2024 and shipped it at the end of March 2025, so this is recent hardware rather than an aging model. Its 15.0 J/TH efficiency is the number to judge it by, because efficiency decides how well a miner keeps earning as network difficulty rises.
Before deciding, study the earnings history chart on this page. It shows how daily earnings for this model have moved in recent months, which gives a more honest picture than a single day snapshot. If the trend looks healthy at your electricity rate and you can support a hydro installation, the S21+ Hydro is a reasonable candidate.
The S21+ Hydro draws 5,370 W. Multiply that by 24 hours and divide by 1,000 and you get about 128.9 kWh per day. At $0.05 per kWh that is $6.45 in daily power cost, and at $0.10 per kWh it is $12.89.
It runs at 15.0 J/TH, which means it spends 15 joules of energy for every terahash of SHA-256 work. Efficiency is the main spec to compare between miners, because it decides how much of your mining revenue is left after paying for electricity.
The S21+ Hydro mines Bitcoin. It is built for the SHA-256 algorithm, and the live calculator on this page shows its current Bitcoin earnings at the electricity rate you enter.
Divide the price shown on this page by the daily profit the live calculator reports at your electricity rate. The result shifts as Bitcoin network conditions change, so treat it as a moving estimate rather than a fixed date, and sanity check it against the earnings history chart.
The Bitmain Antminer S21+ Hydro Bitcoin Miner draws around 5370 W at the wall, which works out to roughly 128.9 kWh of electricity per day. A load of that size needs a stable, dedicated power supply and a circuit sized appropriately for continuous operation, so the electrical setup should be planned by someone qualified to handle it. Because the unit is hydro cooled, the installation also includes a water cooling loop, meaning both the electrical circuit and the water infrastructure need to be in place before the miner goes online.
For most homes, no. The S21+ Hydro pulls 5370 W continuously, which is far beyond what a typical household circuit is set up to handle, and as a hydro cooled unit it requires a water cooling loop as part of the installation. That combination suits mining racks and purpose built spaces rather than living areas. At 13.8 kg the machine itself is not hard to move, but the supporting infrastructure is the real constraint. Home friendly mining usually means low wattage air cooled units, while high wattage air cooled machines already demand serious airflow and dedicated wiring, and hydro models like this one add the water loop on top of that.
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