Antminer S21 Pro
Bitmain - Antminer S21 Pro (245Th)
Description
Antminer S21 Pro (245Th) is an ASIC miner designed for SHA-256 algorithm, specifically targeting BTC. It delivers a maximum hashrate of 245 TH/S while consuming 3675W of power, resulting in an energy efficiency of 15.000 J/Th.
Specifications
Merchant Offers
Circlehash LLC
Swisshash
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Profit Analysis
Profitability Method, Data & Risk Notes
Estimated daily coins = miner hashrate / network hashrate × expected blocks per day × (block subsidy + estimated transaction fees).
Daily electricity cost = miner power in kW × 24 × electricity rate.
Estimated net profit = mining revenue - electricity cost - pool fees - hosting fees - service fees; ROI days = miner price / estimated daily net profit.
Profitability estimates are informational only and are not investment advice. Coin price, network difficulty, pool fees, uptime, electricity price, hosting contracts, maintenance, logistics and regulatory changes can all affect actual returns.
Frequently Asked Questions
Miner Specifications
Antminer S21 Pro uses SHA-256 algorithm with standard hashrate of 245TH/s.
Antminer S21 Pro is manufactured by Bitmain.
Antminer S21 Pro has a rated power consumption of 3675W.
Antminer S21 Pro consumes approximately 88.20kWh per day.
Antminer S21 Pro has a power efficiency of 15.00J/TH/s, which is High Efficiency.
Profit Analysis
Based on data updated May 13, 2026, Antminer S21 Pro profitability is estimated from miner hashrate, selected electricity cost, pool fees, uptime, network difficulty, block subsidy, transaction fees, and current coin price. Actual results may vary.
Antminer S21 Pro daily BTC output is variable. It changes with miner hashrate, network difficulty/hashrate, block subsidy 3.125 BTC until the next Bitcoin halving, transaction fees, pool fees, uptime, and block time.
Electricity cost is usually the largest operating expense. Daily electricity cost equals miner power in kW × 24 × electricity rate, so lower kWh pricing can materially improve net profit and ROI.
Antminer S21 Pro uses SHA-256 algorithm, primarily mining BTC. • Profit Analysis: BTC • Other SHA-256 coins: BCH, BSV, etc.
Hosting Services
Hosting services provide professional data center environment, stable power supply, 24/7 monitoring, technical maintenance support, eliminating personal operation worries and ensuring stable miner operation.
Currently 2 hosting locations are available, with electricity rates ranging from $0.050-$0.150/kWh. Consider electricity cost, uptime, service fees and other factors comprehensively.
Different merchants have different service fee policies. Some charge monthly management fees, others charge based on revenue percentage. Please check detailed quotes from each merchant.
Investment Risk
ROI days for Antminer S21 Pro are calculated as miner purchase price divided by estimated daily net profit. Net profit equals mining revenue minus electricity cost, pool fees, hosting fees, and service fees.
Main risks include: price volatility, network difficulty increase, miner depreciation, electricity rate increase, policy changes, etc. Please fully understand and assess these risks before investing.
Recommendations: diversify investments, choose stable hosting providers, monitor market dynamics, plan investment cycles reasonably, maintain adequate cash flow and other strategies to reduce risks.