How to Calculate Profitability of Antminer S21+: A Practical Guide for Cryptocurrency Miners
The Antminer S21+ has emerged as a game-changer in the Bitcoin mining industry, offering unparalleled performance and efficiency. As a flagship model from Bitmain, it represents the pinnacle of SHA256 algorithm mining technology. However, investing in such high-performance hardware requires careful consideration of its profitability potential. This article will guide you through the process of calculating the profitability of the Antminer S21+, while highlighting its key features and advantages that make it a standout choice for miners.
Introducing the Antminer S21+
The Antminer S21+ is designed to meet the demands of modern cryptocurrency mining, delivering an impressive 216 TH/s hashrate. This level of performance makes it one of the most powerful ASIC miners available today, capable of mining Bitcoin (BTC) and Bitcoin Cash (BCH) with exceptional efficiency. Its compact design (400 x 195 x 290mm) makes it versatile enough for both large-scale mining farms and smaller, home-based operations.
One of the standout features of the S21+ is its advanced thermal management system, which includes a quad-fan cooling mechanism. This ensures optimal operating temperatures (0-45°C) while maintaining noise levels at a manageable 76dB. Additionally, its humidity tolerance of 10-90% and storage temperature range of -20° to 70°C make it highly adaptable to various environmental conditions.
Powering this miner requires an industrial-grade 380-415V power supply, reflecting its professional-grade architecture. The inclusion of an Ethernet interface facilitates seamless integration with modern mining infrastructure, enabling remote monitoring and control.
Key Advantages of the Antminer S21+
Before diving into profitability calculations, it’s essential to understand the features that set the Antminer S21+ apart:
- High Hashrate and Efficiency: With a 216 TH/s hashrate, the S21+ delivers exceptional mining power, allowing miners to solve more blocks and earn more rewards. Its power efficiency ensures that energy costs are minimized, maximizing ROI.
- Advanced Cooling System: The quad-fan cooling system not only maintains optimal temperatures but also extends the lifespan of the hardware by preventing overheating.
- Modular Design: The miner’s modular construction simplifies maintenance and component replacement, reducing downtime and operational costs.
- Global Warranty and Support: Backed by a 365-day warranty from Bitmain, the S21+ offers peace of mind with comprehensive after-sales service and technical assistance.
- Environmental Adaptability: Whether you’re operating in a hot, cold, or humid environment, the S21+ is built to perform reliably.
These advantages make the Antminer S21+ a top choice for miners looking to optimize their operations and maximize returns.
Calculating Profitability of the Antminer S21+
To determine whether the Antminer S21+ is a profitable investment, you’ll need to consider several factors:
1. Hashrate and Mining Rewards
The S21+ boasts a hashrate of 216 TH/s, meaning it can perform 216 trillion hashes per second. This directly impacts your ability to solve blocks and earn Bitcoin rewards. Higher hashrates increase your chances of successfully mining a block, especially when competing against other miners.
2. Power Consumption and Electricity Costs
Power efficiency is a critical factor in mining profitability. The S21+ operates at a power consumption of approximately 3600W. To calculate daily energy costs, use the following formula:
` Daily Energy Cost = Power Consumption (kW) × Electricity Rate ($/kWh) × 24 hours `
For example, if your electricity rate is $0.10/kWh:
` Daily Energy Cost = 3.6 kW × $0.10 × 24 = $8.64 per day `
3. Mining Pool Fees
Most miners join mining pools to increase their chances of earning consistent rewards. Pool fees typically range from 1% to 3% of your earnings. Be sure to account for these fees in your calculations.
4. Bitcoin Price and Network Difficulty
Bitcoin’s price and network difficulty are volatile factors that significantly impact profitability. Higher Bitcoin prices increase the value of your mined coins, while increased network difficulty reduces the likelihood of solving blocks. Use up-to-date data from reliable sources like CoinMarketCap or MiningPoolStats for accurate calculations.
5. Hardware and Maintenance Costs
While the S21+ is designed for durability, occasional maintenance and repairs may be necessary. Factor in the initial purchase price of the miner and any ongoing maintenance costs when assessing profitability.
Step-by-Step Profitability Calculation
Let’s walk through a practical example to calculate the profitability of the Antminer S21+:
- Determine Daily Revenue:
Use a mining calculator or the following formula:
` Daily Revenue = (Hashrate / Network Difficulty) × Block Reward × (1 – Pool Fee) `
Suppose the current network difficulty is 50 trillion, the block reward is 6.25 BTC, and the pool fee is 2%:
` Daily Revenue = (216 TH/s / 50 trillion) × 6.25 BTC × 0.98 = 0.026 BTC/day `
- Convert BTC to Fiat Currency:
If the current Bitcoin price is $30,000:
` Daily Revenue in USD = 0.026 BTC × $30,000 = $780 `
- Subtract Daily Costs:
Using the earlier energy cost example ($8.64/day):

` Daily Profit = $780 – $8.64 = $771.36 `
- Calculate Monthly and Annual Profit:
` Monthly Profit = $771.36 × 30 = $23,140.80 Annual Profit = $771.36 × 365 = $281,546.40 `
- Consider Initial Investment:
If the S21+ costs $5,000, your break-even point would be approximately 6.5 days.
Maximizing Profitability with the Antminer S21+
To further enhance your ROI, consider these strategies:
- Optimize Energy Costs: Leverage renewable energy sources or relocate to regions with lower electricity rates.
- Join Efficient Mining Pools: Choose pools with low fees and high uptime.
- Monitor Market Trends: Stay informed about Bitcoin price fluctuations and network difficulty changes.
- Scale Your Operations: Deploy multiple S21+ units to benefit from economies of scale.
Conclusion
The Antminer S21+ is a powerhouse miner that combines cutting-edge technology with practical features to deliver exceptional performance. By carefully calculating its profitability and optimizing your mining setup, you can maximize your returns and stay competitive in the ever-evolving cryptocurrency landscape.

Whether you’re a seasoned mining operator or a newcomer to the industry, the S21+ offers the tools you need to succeed. With its high hashrate, advanced cooling system, and global warranty, it’s an investment that promises both reliability and profitability.
Ready to take your mining operation to the next level? The Antminer S21+ might just be the key to unlocking your full potential.