Sign upTrial Mining
Trial Mining
SHA-256

Antminer S21
Profitability Calculator

Real-time mining profit for Antminer S21. Adjust electricity cost and pool fee to see your exact daily earnings.

200 TH/sHashrate
3500WPower
17.5 J/THEfficiency

Configure Your Miner

Adjust parameters to match your setup

ASIC ModelAntminer S21

Earnings Estimate

Based on current BTC price ~$120,000

Monthly Net Profit+$157.60
Daily Revenue$11.17
Daily Electricity−$6.00
Daily Net+$5.17
Break-even electricity$0.06/TH/day
Payback period~2.1 years
Electricity as % of revenue 54%
Get Hosting from $0.04/kWh

Overview

Antminer S21
ManufacturerBitmain
AlgorithmSHA-256
Target UseHosting / Industrial
Release Year2024
PositioningCurrent-generation efficiency

The Antminer S21 is a current-generation Bitmain SHA-256 miner rated around 200 TH/s at 17.5 J/TH. It is designed for professional mining setups where efficiency, uptime, and predictable hosting economics matter.

Technical Specifications

Hashrate200 TH/s
Power Consumption3500 W
Efficiency17.5 J/TH
AlgorithmSHA-256
Noise Level75 dB
CoolingAir
Dimensions400 × 195 × 290 mm
Weight15.4 kg

Profitability Breakdown

At $0.03/kWh, electricity consumes $6.00/day, leaving $5.17 net. Break-even at $0.06/kWh.

$0.02/TH/day
+$7.17
$0.03/TH/day
+$5.17
$0.04/TH/day
+$3.17
$0.05/TH/day
+$1.17
$0.06/TH/day
$-0.83

How Electricity Price Affects Antminer S21

Break-even electricity price$0.06/TH/day

Antminer S21 efficiency of 17.5 J/TH means this model keeps a healthier margin than older S19 units, but still benefits strongly from industrial hosting rates.

Electricity rateStatus
Below $0.05/kWhProfitable
$0.05 – $0.06/kWhMarginal
Above $0.06/kWhUnprofitable
Learn about electricity costs for mining

Home Mining vs Hosting for Antminer S21

Home Mining
  • High electricity rates
  • 75 dB noise
  • Self-managed maintenance
  • Limited scalability
  • DIY cooling required
  • Full hardware control
ECOS HostingRecommended
  • Industrial rates $0.04–0.06/kWh
  • Zero noise concerns
  • Managed 24/7
  • Scale from 1 to 1000+ units
  • Professional cooling
  • Higher net profit margin

ROI and Payback Period

ROI calculator
Hardware Price$3,900
Monthly Profit $157.60
Break-even~2.1 years

ROI depends on BTC price and network difficulty. The full ROI Calculator lets you model bear-market and bull-market scenarios side by side.

Open ROI Calculator

Pros & Cons of Antminer S21

Pros
  • Modern efficiency
  • Strong hashrate per unit
  • Good hosting fit
  • Better margin than older SHA-256 ASICs
Cons
  • Higher upfront cost
  • Requires managed power and cooling
  • Less efficient than S21 Pro

Alternatives to Antminer S21

Antminer S21 Pro

Antminer S21 Pro

270 TH/s15.1 J/TH

Higher-end S21 model with stronger efficiency.

View calculator
Whatsminer M60S

Whatsminer M60S

186 TH/s18.5 J/TH

MicroBT alternative with competitive pricing.

View calculator

Related Tools & Pages

Everything you need to make an informed mining decision

ASIC Profitability Calculator ROI Calculator Electricity & Energy Guide Mining Infrastructure Buy Mining Hardware

Frequently Asked Questions

Frequently Asked Questions

Have more questions about mining profitability?
At $0.06/kWh, Antminer S21 currently generates ~$157.60/month net. Profitability depends on BTC price, difficulty, and your electricity rate. Use the calculator above to model your exact setup.
Antminer S21 breaks even at $0.06/kWh at current BTC prices. Industrial hosting rates ($0.04–0.06/kWh) provide the healthiest margins.
Antminer S21 runs at 75 dB and draws 3500W. Home mining requires low residential electricity rates and proper ventilation. Professional hosting is usually more cost-effective.
At current settings the estimated payback is ~2.1 years. Lower electricity costs and higher BTC prices shorten this significantly. ECOS hosting at $0.04/kWh can reduce payback by 20–40%.
Yes. Industrial hosting rates ($0.04–0.06/kWh) can increase net monthly profit by 30–60% compared to average residential rates. ECOS offers managed hosting with transparent pricing and 24/7 monitoring.