Bitmain Antminer S21+ Profitability Calculator

Antminer S21+ Profitability Overview

The Bitmain Antminer S21+ profitability calculator helps miners estimate potential earnings based on hashrate, electricity rates and current Bitcoin mining conditions. Designed for SHA-256 mining, the Antminer S21+ delivers strong performance while maintaining energy efficiency for Bitcoin mining operations. Daily profits, monthly revenue and annual earnings may vary depending on Bitcoin market prices, network difficulty and overall mining competition.

Understanding profitability before investing in mining hardware is essential for maximizing return on investment. The Antminer S21+ ROI analysis provides valuable insight into electricity consumption, operating expenses and estimated mining rewards. By comparing projected revenue with power costs, miners can evaluate long-term earning potential and determine whether the Antminer S21+ aligns with their mining objectives. Monitoring profitability regularly can help optimize mining performance and improve strategic decision-making as market conditions evolve.

Antminer S21+ Specifications That Affect Profitability

The Bitmain Antminer S21+ runs the SHA-256 algorithm at 216 TH/s while drawing 3564 W from the wall. That works out to an efficiency of 16.5 J/TH, and efficiency is the figure that matters most for long term profitability, because it tells you how much electricity each terahash of work consumes.

The unit is air cooled and weighs 22.9 kg, so plan for a well ventilated space and a shelf or rack that can hold it. Steady airflow helps the machine run at its rated speed, which is what the earnings estimates in the calculator above assume.

How Electricity Cost Changes Antminer S21+ Earnings

At 3564 W, the S21+ consumes about 85.5 kWh of electricity every day. If you pay $0.05 per kWh, that is $4.28 per day in power costs. At $0.10 per kWh the daily cost doubles to $8.55. Your electricity rate is the one input you control, so it often decides whether this miner is profitable for you.

Revenue is the other half of the equation, and it moves with the Bitcoin network. Difficulty and the Bitcoin price change over time, so enter your own rate in the calculator above to see current daily, monthly and yearly estimates instead of relying on a fixed number.

Is the Antminer S21+ Still Worth Buying?

Bitmain announced the Antminer S21+ in October 2024 and launched it in February 2025, so it belongs to the current generation of Bitcoin miners. Its 16.5 J/TH efficiency should keep it competitive longer than older, less efficient hardware as network difficulty rises.

Before you buy, look at the earnings history chart on this page. It shows how daily earnings for the S21+ have trended through recent network changes, which gives a more honest picture than any single day of results. Combine that trend with your own electricity rate in the calculator to judge whether the machine fits your operation.