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Mining profitability
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Bitmain Antminer S21 Plus (235 TH/s)
Antminer S21 Plus Profit Calculator delivers accurate real-time pro…fitability insights powered by live network data. Discover how much your Antminer S21 Plus can earn using our advanced ASIC miner calculator. We use current mining reward data, network difficulty, block rewards, and market prices while automatically factoring in your electricity costs to give you a clear and detailed overview of potential daily, monthly, and yearly returns. This powerful Antminer S21 Plus Mining Profit Calculator helps you evaluate profitability across different scenarios, adjust power settings, electricity rates, and hardware configurations so you can make informed decisions about your mining hardware investment. Stay ahead with continuously updated data for the best Antminer S21 Plus Mining Profitability.
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Antminer S21 Plus Profit Calculator delivers accurate real-time profitability insights powered by live network data. Discover how much your Antminer S21 Plus can earn using our advanced ASIC miner calculator. We use current mining reward data, network difficulty, block… rewards, and market prices while automatically factoring in your electricity costs to give you a clear and detailed overview of potential daily, monthly, and yearly returns. This powerful Antminer S21 Plus Mining Profit Calculator helps you evaluate profitability across different scenarios, adjust power settings, electricity rates, and hardware configurations so you can make informed decisions about your mining hardware investment. Stay ahead with continuously updated data for the best Antminer S21 Plus Mining Profitability.
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Released: January 2025
Manufacturer
Realtime Mining Profit
$1.72/day
235TH/s
Hashrate
3875.5W
Power
Profitability Analysis
Live Data
Here you can see a detailed analysis of miner profitability, updated in real-time.
Current BTC Price
$81,238.00
| Period | Income | Expense | Profit |
|---|---|---|---|
|
Daily
|
$9.16 | $7.44 |
$1.72
|
|
Monthly
|
$274.82 | $223.23 |
$51.59
|
|
Yearly
|
$3,343.65 | $2,715.95 |
$627.70
|
No Offer available
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Overview
Bitmain Antminer S21 Plus (235TH/s) — Hardware Overview
Learn more about this ASIC miner, including its specifications, performance, energy consumption, and profitability.
The Bitmain Antminer S21+ (235Th) presents itself as a purpose-built instrument for the SHA-256 mines, delivering a raw hashrate of 235 terahashes per… second while drawing roughly 3,877 watts and achieving an energy efficiency near 16.5 joules per terahash; its advanced firmware permits dynamic frequency scaling to adapt performance to power stability, and its robust industrial-grade construction and compact, user-friendly form factor make it suited to continuous 24/7 operation in diverse mining installations. Four high-speed fans and a refined air-cooling architecture keep operating temperatures in check and sustain consistent output, while a noise footprint around 75 decibels is to be expected from equipment of this capacity; the miner’s reliability and component quality support professional-scale deployments, and integration is eased by straightforward setup and management features. For operators seeking to project returns, a crypto-miner profit calculator can estimate potential earnings and electricity costs on daily, monthly, and yearly horizons based on chosen electricity rates and operational scenarios, helping to plan capacity, assess efficiency and weigh runtime trade-offs; in the quiet of a server room the S21+ hums like an apparatus engaged in an intellectual converse with an indifferent void, each hash a terse phrase in a dialogue between relentless computation and the yawning, pragmatic silence of power and profit.
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The Bitmain Antminer S21+ (235Th) presents itself as a purpose-built instrument for the SHA-256 mines, delivering a raw hashrate of 235 terahashes per second while drawing roughly 3,877 watts and achieving an energy efficiency near 16.5 joules per terahash; its advanced firmware permits dynamic frequency scaling to adapt performance to power stability, and its robust industrial-grade construction and compact, user-friendly form factor make it suited to continuous 24/7 operation in diverse mining installations. Four high-speed fans and a refined air-cooling architecture keep operating temperatures in check and sustain consistent output, while a noise footprint around 75 decibels is to be expected from equipment of this capacity; the miner’s reliability and component quality support professi…onal-scale deployments, and integration is eased by straightforward setup and management features. For operators seeking to project returns, a crypto-miner profit calculator can estimate potential earnings and electricity costs on daily, monthly, and yearly horizons based on chosen electricity rates and operational scenarios, helping to plan capacity, assess efficiency and weigh runtime trade-offs; in the quiet of a server room the S21+ hums like an apparatus engaged in an intellectual converse with an indifferent void, each hash a terse phrase in a dialogue between relentless computation and the yawning, pragmatic silence of power and profit.
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Discover Which Coins This Miner Can Mine
Explore the cryptocurrencies that can be mined using Bitmain Antminer S21 Plus (235TH/s), including detailed profitability.
Currency Converter
Calculate the mineable coins to any currency.
Rate is for reference only. Updated just now.
| Coin | Income/Day | Profit/Day |
|---|---|---|
|
$9.11
$
0.00011219
|
$1.67
$
0.00002059
|
|
|
$9.16
$
0.00011265
|
$1.72
$
0.00002115
|
|
|
$8.85
$
0.03552770
|
$1.41
$
0.00564553
|
|
|
$3.11
$
9.02
|
$-4.33
$
-12.57789007
|
Historical Mining Performance
Bitmain Antminer S21 Plus (235TH/s) performance trends over weekly, monthly, and yearly timeframes.
Historical Profitability
View the historical income and profit trends for this miner.
Where to Buy?
Explore current market availability, trusted suppliers and the latest pricing and stock for this ASIC miner. V…erified vendors are clearly marked with a green checkmark. Verified Vendor means we have reviewed the company registration and verified their control over at least one company asset, along with other eligibility criteria. Regardless, offers are provided by third-party sellers, we assume no liability. In case of serious issues, please contact us so we can review their eligibility to be listed on our pages.
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Explore current market availability, trusted suppliers and the latest pricing and stock for this ASIC miner. Verified vendors are clearly marked with a green checkmark. Verified Vendor means we have reviewed the company registration and verified their control… over at least one company asset, along with other eligibility criteria. Regardless, offers are provided by third-party sellers, we assume no liability. In case of serious issues, please contact us so we can review their eligibility to be listed on our pages.
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No Offers Available
There are currently no offers for this miner. Please check back later.
SHA-256 Miner Generations
Evolution of cryptocurrency mining hardware throughout the years, with the current generation highlighted for reference.
Gen 1
33 miners
Generation 1
33 miners
Gen 2
33 miners
Generation 2
33 miners
Gen 3
33 miners
Generation 3
33 miners
Gen 4
34 miners
Generation 4
34 miners
Gen 5
34 miners
Generation 5
34 miners
Gen 6
34 miners
Generation 6
34 miners
Gen 7
34 miners
Generation 7
34 miners
Gen 8
34 miners
Generation 8
34 minersGeneration 1
33 minersGeneration 2
33 minersGeneration 3
33 minersGeneration 4
34 minersGeneration 5
34 minersGeneration 6
34 minersGeneration 7
34 minersGeneration 8
34 miners
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Deep dive
Bitmain Antminer S21 Plus — In Detail
Bitmain Antminer S21 Plus (235TH/s) — a closer look at the hardware and how it performs.
The Antminer S21+ (235Th) arrives not as a toy but as a surgical instrument for SHA-256 mining, precise and unforgiving. It delivers 235 terahashes pe…r second while drawing roughly 3,877 watts, yielding about 16.5 joules per terahash. At its core sits a 5 nm ASIC with proprietary chip optimizations that push hashing efficiency and cut waste heat. Firmware adds dynamic frequency scaling, which dials performance to match power stability or temperature limits. The chassis supports immersion cooling to dramatically lower junction temperatures and prolong component life in dense deployments. When air cooling is used, a refined architecture with four high-speed fans maintains steady thermal conditions. Industrial-grade components and a compact rack-friendly footprint make true 24/7 operation feasible. Expect a noise level near 75 dB, so plan acoustic isolation if humans work nearby. Remote management hooks into an AI-driven monitoring platform that provides real-time diagnostics, automated tuning, and fleet scheduling. Operators must design robust power distribution and targeted airflow because sustained hashing concentrates electrical and thermal stress. Regular firmware updates and preventive maintenance are non-negotiable to preserve efficiency and avoid abrupt failures. In short, the S21+ rewards those who treat deployment like clinical care: balance power, cooling, and service rhythm, and the machine will deliver steady throughput; neglect any of those, and the margins-and the hardware-suffer.
Read more Read less
The Antminer S21+ (235Th) arrives not as a toy but as a surgical instrument for SHA-256 mining, precise and unforgiving. It delivers 235 terahashes per second while drawing roughly 3,877 watts, yielding about 16.5 joules per terahash. At its core sits a 5 nm ASIC with proprietary chip optimizations that push hashing efficiency and cut waste heat. Firmware adds dynamic frequency scaling, which dials performance to match power stability or temperature limits. The chassis supports immersion cooling to dramatically lower junction temperatures and prolong component life in dense deployments. When air cooling is used, a refined architecture with four high-speed fans maintains steady thermal conditions. Industrial-grade components and a compact rack-friendly footprint make true 24/7 operation fea…sible. Expect a noise level near 75 dB, so plan acoustic isolation if humans work nearby. Remote management hooks into an AI-driven monitoring platform that provides real-time diagnostics, automated tuning, and fleet scheduling. Operators must design robust power distribution and targeted airflow because sustained hashing concentrates electrical and thermal stress. Regular firmware updates and preventive maintenance are non-negotiable to preserve efficiency and avoid abrupt failures. In short, the S21+ rewards those who treat deployment like clinical care: balance power, cooling, and service rhythm, and the machine will deliver steady throughput; neglect any of those, and the margins-and the hardware-suffer.
Read more Read less
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Full spec sheet
Technical Specifications
Bitmain Antminer S21 Plus (235Th) — full hardware specifications and mining capabilities.
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Basic Information
Brand
Bitmain
Model
Antminer S21 Plus
Release Date
January 2025
Algorithm
SHA-256
Performance
Hashrate
235 TH/s
Power Consumption
3875.5W
Noise Level
75db
Voltage
100-240V
Physical Dimensions
Size
400 * 195 * 290
Weight
15100gkg
Interface
Ethernet
Humidity
5 - 90 %
Temperature
5 - 35 °C
Cooling
Air
Mineable Cryptocurrencies
BTC
Bitcoin
BCH
Bitcoin Cash
FB
Fractal Bitcoin
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The algorithm
Algorithm Information: SHA-256
SHA-256 — what this algorithm is and how it works.
SHA-256 is a cryptographic hash function. Bitcoin relies on it for proof-of-work consensus. This algorithm processes input data of any length and produces a fixed hash value, ensuring security and integrity in the mining process.
Crypto Mining Pools
Connect to the most reliable mining pools and maximize your crypto mining efficiency with optimized uptime and profitability.
User Reviews
See what users are saying about this miner.
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Answers
Bitmain
Frequently Asked Questions
Everything you need to know about the Bitmain Antminer S21 Plus (235Th)
The efficiency of the Bitmain Antminer S21 Plus 235TH/s is 16.49 J/TH with a hashrate of 235TH/s and power consumption of 3875.5W.
The Bitmain Antminer S21 Plus 235TH/s consumes $7.44 daily, $223.23 monthly, and $2,715.95 yearly in electricity costs.
The Bitmain Antminer S21 Plus 235TH/s uses 3875.5W of electricity.
The Antminer S21 Plus is manufactured by Bitmain.
The Bitmain Antminer S21 Plus has a hashrate of 235TH/s using the SHA-256 algorithm.
The Bitmain Antminer S21 Plus 235TH/s can mine the following cryptocurrencies:
NiceHash (BTC)
Bitcoin (BTC)
Bitcoin Cash (BCH)
Fractal Bitcoin (FB)
NiceHash (BTC)
Bitcoin (BTC)
Bitcoin Cash (BCH)
Fractal Bitcoin (FB)
As of September 19, 2026 with an electricity cost of $0.08 the Bitmain Antminer S21 Plus 235TH/s generates $1.72 daily, $51.59 monthly, and $627.70 yearly.
This makes the Bitmain Antminer S21 Plus 235TH/s a profitable choice for mining.
This makes the Bitmain Antminer S21 Plus 235TH/s a profitable choice for mining.
Based on our real-time ASIC mining profit calculation, the Bitmain Antminer S21 Plus is currently most profitable mining Bitcoin at your electricity rate of $0.080/kWh. This can change as coin prices and network difficulty shift, so check the Mineable Coins table above for the latest ranking.
This ASIC mining profit calculation for the Bitmain Antminer S21 Plus uses live cryptocurrency prices, current network difficulty, and block rewards for every supported coin, combined with your custom electricity rate. Figures update automatically as network conditions change, so the profitability shown reflects current conditions rather than a static estimate.
NiceHash is a hashpower marketplace, not a traditional mining pool — instead of mining a coin directly, you sell your Bitmain Antminer S21 Plus hashrate to buyers and get paid in Bitcoin. Compare the NiceHash row against direct-mining rows in the Mineable Coins table above: whichever shows the higher Profit/Day at your electricity rate is currently the better option for this specific miner.
This miner is not currently listed by any of our verified vendors. You can still use the profitability figures on this page to plan ahead for when new listings appear.
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