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Antminer S21 Pro ASIC Profitability Calculator

Calculate daily profit, monthly profit, electricity cost, net mining earnings and estimated break-even for a pre-filled Antminer S21 Pro setup.
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Pre-filled calculator

Edit hashrate, power, electricity and pool fee
Antminer S21 Pro
Daily profit$6.98
Monthly profit$212.76
Electricity cost$8.10
Net profit$6.98
Estimated break-even~22.56 months

Antminer S21 Pro Overview

Antminer S21 Pro
Manufacturer
Bitmain
Algorithm
SHA-256
Target use
Hosting / Industrial
Release year
2024
Positioning
High-efficiency flagship

The Antminer S21 Pro is a SHA-256 ASIC miner designed for high-efficiency Bitcoin mining. It is positioned for hosted and industrial operations where electricity rates, uptime and cooling have a direct impact on net profitability.

Technical Specifications

Hashrate270 TH/s
Power Consumption3531 W
Efficiency15.1 J/TH
AlgorithmSHA-256
Noise level75 dB
CoolingAir

Profitability Breakdown

At the current electricity rate, this ASIC spends $8.10 per day on power and leaves $6.98 net. It becomes unprofitable when electricity rises above roughly $0.06/kWh under the current assumptions.

ElectricityDaily Profit
$0.04/TH/day+$4.28
$0.06/TH/day$-1.12
$0.08/TH/day$-6.52

How Electricity Price Affects Antminer S21 Pro Profitability

Antminer S21 Pro breaks even at about $0.06/kWh in this model. Below that point, hosted or industrial power rates can support positive net mining earnings; above it, home mining becomes much harder to justify.

Open Electricity & Energy

Home Mining vs Hosting for Antminer S21 Pro

Home

  • Higher residential electricity rates
  • Noise and ventilation constraints
  • Self-managed maintenance
  • Limited scalability

Hosting

  • Industrial electricity rates
  • No home noise exposure
  • Managed maintenance
  • Easier fleet scaling

ROI and Payback Period

Hardware price$4,800.00
Monthly profit$212.76
Payback period~22.56 months

ROI depends on hardware price, BTC price, network difficulty, pool fee and electricity rate. A realistic payback period requires stable uptime and power pricing below the break-even threshold.

Pros & Cons of Antminer S21 Pro

Pros

  • Strong energy efficiency for SHA-256 mining
  • Reliable flagship hardware class
  • Good resale value in active ASIC markets

Cons

  • High initial hardware cost
  • Requires dedicated power capacity
  • Noise and cooling make home mining difficult

Alternatives to Antminer S21 Pro

Antminer S19 XPLower upfront cost with weaker efficiency and tighter margins.Whatsminer M60SComparable modern SHA-256 miner with different pricing and availability.

Related Tools & Pages

Continue from the calculator into ROI, electricity, infrastructure and hardware research.

ASIC Profitability Calculator FAQ

ASIC profitability questions

Antminer S21 Pro can be profitable when electricity rates stay below the calculated break-even level and uptime is stable. Profitability still depends on BTC price, network difficulty and pool fees.
With the current inputs, break-even electricity is around $0.06/kWh. Lower power rates create a healthier margin.
Antminer S21 Pro is usually better suited to hosting or industrial sites because power draw, heat and noise are difficult to manage at home.
With the current calculator inputs, the estimated payback is 22.56 months. This changes as BTC price, difficulty and electricity rates move.
Hosting can improve profitability when it provides lower electricity rates, stable uptime, cooling and managed maintenance compared with home mining.