The Antminer S21 family is the backbone of Bitcoin mining in 2026, but "the S21" is no longer one machine — it's a whole range running from a $1,200 value unit to a $9,500 hydro monster. Prices in Europe swing with efficiency, batch availability, VAT and the Bitcoin price, so it pays to know exactly what each model does before you buy. This guide breaks down every current S21 variant, what it costs in Europe right now, and which one actually makes sense for your setup.
Antminer S21 price in Europe 2026: quick comparison
Here's the current line-up we stock, with verified specs and our European pricing. Efficiency (joules per terahash) is the number that matters most in 2026 — the lower it is, the more Bitcoin you keep per kWh.
| Model | Hashrate | Efficiency | Cooling | Price (from) |
|---|---|---|---|---|
| S21 Pro (245T) | 245 TH/s | ~15 J/TH | Air | $1,223 |
| S21+ (235T) | 235 TH/s | ~16.5 J/TH | Air | $1,899 |
| S21 XP (270T) | 270 TH/s | 13.5 J/TH | Air | $2,360 |
| S21 XP Hyd (~495T) | ~495 TH/s | ~12 J/TH | Hydro | $8,415 |
| S21 XP+ Hyd (500T) | 500 TH/s | 11 J/TH | Hydro | $9,500 |
Prices are indicative and move with batch availability and the BTC price. Browse live stock on the miners page.
The full S21 family explained
Bitmain has spun the S21 into a ladder of models. The original S21 (200 TH/s, 17.5 J/TH) launched in early 2024. Since then the range has grown in two directions — cheaper value bins and more efficient flagships:
- S21 Pro — 234–245 TH/s at roughly 15 J/TH. The value-efficiency sweet spot of the air-cooled range.
- S21+ — 235 TH/s at about 16.5 J/TH. A higher-output air unit, slightly less efficient than the Pro.
- S21 XP — 270 TH/s at a verified 13.5 J/TH (Bitmain's official spec). The most efficient air-cooled S21.
- S21 Hydro / XP Hyd / XP+ Hyd — liquid-cooled units from 335 TH/s up to 500 TH/s, reaching 11–12 J/TH. Built for farms with a water loop and three-phase power.
One naming note: some retailers list an "S21j XP Hyd" — the real Bitmain product in that band is the S21 XP Hyd at ~473 TH/s and 12 J/TH. Whatever the label, the spec band to care about is 473–500 TH/s at 11–12 J/TH.
Antminer S21 XP: specs, hashrate and 13.5 J/TH efficiency
The S21 XP is the model most home and hosted miners should look at first. Per Bitmain's official spec sheet it delivers 270 TH/s on SHA-256, draws 3,645 W at the wall, and lands at 13.5 J/TH — roughly 23% more efficient than the original S21 while producing 35% more hashrate. At about 87.5 kWh per day, that efficiency is the difference between a profit and a loss when the Bitcoin price dips.
S21 Pro vs S21+ vs S21 XP
For air-cooled buyers this is the real decision. The S21 Pro is the cheapest way onto a modern, reasonably efficient machine. The S21+ pushes similar hashrate at slightly worse efficiency. The S21 XP costs more up front but earns more and survives low-margin periods better. If the Pro and XP prices ever sit close, the XP is the smarter long-term buy; if you're optimising purely for upfront cost, the Pro wins.
Antminer S21 prices in Europe — what you'll actually pay in 2026
European street prices in 2026 typically run around €1,150–1,900 for an S21 Pro, €1,750–2,200 for an S21+, €2,200–3,800 for the air-cooled S21 XP, and €6,800–9,800 for the hydro XP models. Four things move that number: efficiency (lower J/TH commands a premium), batch timing (in-stock EU warehouse vs pre-order from Asia), VAT (19–27% across the EU, often shown separately for business buyers), and the Bitcoin price, which drives ASIC demand and resale value. Buying from EU-warehoused stock costs a little more than a China pre-order but ships in days and avoids customs headaches.
Is the Antminer S21 profitable in 2026?
Mid-June 2026 conditions are tight: Bitcoin is trading around $64,000–66,000, network difficulty just dropped about 10%, and hashprice sits near $0.033 per TH per day. On those numbers an S21 XP earns roughly $8.90/day gross. Here's the net picture at two electricity prices (estimates — figures move daily):
| Model | Gross/day | Net/day @ $0.02 (hosted) | Net/day @ $0.10 (home) |
|---|---|---|---|
| S21 XP (270T) | $8.91 | ≈ +$7.16 | ≈ +$0.16 |
| S21 Pro (245T) | $8.09 | ≈ +$6.33 | ≈ −$0.73 |
| S21+ (235T) | $7.76 | ≈ +$5.90 | ≈ −$1.54 |
The lesson is blunt: at typical home electricity (~$0.10/kWh) only the efficient XP stays in the black, and barely. At hosted/industrial power (~$0.02/kWh) all three print a solid profit. In 2026, cheap power isn't a nice-to-have — it's the whole game. For the deeper numbers on a single model, see our full S21 XP review.
Air vs hydro: which S21 should you buy?
Air-cooled S21s (S21, Pro, S21+, XP) use fans, plug into standard power, and are the realistic choice for home or small setups. Hydro models (S21 XP Hyd, XP+ Hyd) push up to 500 TH/s at 11–12 J/TH and run quieter — but they need a water-cooling loop and three-phase power, so they only make sense inside a farm or hosting facility.
Rule of thumb: home miner → S21 XP. Value or hosted buyer → S21 Pro. Industrial farm → XP+ Hyd.
Don't have $0.02/kWh power at home?
Host your S21 in our low-cost facilities from $0.018/kWh and skip the noise, heat and electricity bills. We rack it, run it, and you keep 100% of the Bitcoin it mines.
Where to buy and host in the UK and Europe
We ship every S21 variant across the UK and Europe and can host it for you in cheap-energy locations from Paraguay to the Nordics. Compare the range on the miners page, or read our 2026 Bitcoin miner buyer's guide if you're still deciding between brands.