Antminer S21 Profitability — Bitcoin Mining
200 TH/s at 3,500 W (approx. manufacturer spec) · 17.5 J/TH · subsidy-only math against live network hashrate
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loading live data…
Hashrate
200 TH/s
approx. spec — see table
Wall power
3,500 W
at the wall, approx. spec
Efficiency
17.5 J/TH
energy per unit of hash — lower is better
Algorithm
SHA-256
Bitcoin
Bitcoin hashprice
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USD per TH/s per day, subsidy only
Revenue at spec
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USD/day, before pool fee & power
Break-even electricity
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$/kWh where this rig stops paying
Network hashrate
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BTC, live
Antminer S21 Calculator
check your bill — US residential average is ≈$0.16; hosted rates often $0.06–0.08
Revenue
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USD per day, subsidy only
Electricity
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USD per day at your rate
Profit / day
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revenue minus electricity
Profit / 30 days
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at today's numbers
Break-even electricity
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$/kWh where profit crosses zero
Power cost share
electricity as % of revenue — past 100% the machine is a heater
Sats stacked / day
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what your pool balance grows by, price aside
Efficiency at your inputs
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J/TH from the hashrate and watts in play
Payback (hardware cost)
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at today's numbers, flat difficulty — network growth extends this; treat as a floor, not a forecast
Live network hashrate and prices, subsidy only, transaction fees excluded (slightly conservative). Excludes cooling; payback assumes flat difficulty. Inputs are saved in your browser. Not financial advice.
Is the Antminer S21 profitable?
Bitmain's mainstream current-generation SHA256 unit: 200 TH/s at 3,500 W (approx. manufacturer spec; the family also ships lower bins around 188–195 TH), 17.5 J/TH. The S21 family is the post-2024-halving baseline — this page tracks what the spec earns at live Bitcoin network conditions, subsidy only, fees excluded.
The only honest answer is a live one: revenue moves with the Bitcoin price and network hashrate every day. The fleet baseline: when hosting quotes are priced “per S21”, this page is the sanity check that the quote survives your all-in rate. The break-even electricity figure is the line — pay less per kWh than that and the machine earns, pay more and it burns.
Specs & physical reality
| Spec | Value |
|---|---|
| Factory bin — 200 TH/s | 200 TH/s · 3,500 W · 17.5 J/TH |
| Input power | 200–240 V dedicated circuit |
| Current draw | ≈15.2 A at 230 V |
| Heat output | ≈11,942 BTU/hr (3,500 W — all of it becomes room heat) |
| Noise | ≈75 dB (manufacturer claim) — server-fan loud, not for living spaces |
| Warranty | 365-day manufacturer term is typical, from ship date — confirm in writing; used units carry none |
| Spec source | Bitmain — approx. manufacturer figures; real units vary by bin, firmware and temperature |
FAQ
- What does the revenue figure include?
- Block subsidy only — 144 blocks/day × 3.125 BTC at the live price, scaled by this rig's share of live network hashrate, after your pool fee and uptime. Transaction fees are excluded, so it is slightly conservative.
- What does the revenue figure exclude?
- Transaction fees, cooling power, and future difficulty growth — the payback figure assumes today's difficulty holds, which historically it does not. Treat payback as a floor.
Source: mempool.space (BTC hashrate), CoinGecko (price) — will be cross-checked against BasinTwo's own nodes as they reach tip. Specs are approx. manufacturer figures. Updated every 60s in your browser.