MicroBT
WhatsMiner M70S 248T
AvailableNew
- Hashrate
- 248TH/s
- Power
- 3,348W
- Efficiency
- 13.5J/TH
- Air-cooled
- SHA-256
$3,062.80$12.35/TH
Picture of the model. The unit you receive may differ in appearance.
Bitmain Antminer S21 XP 270 TH/s Bitcoin Miner
The Antminer S21 XP is an air-cooled Bitcoin miner from Bitmain, rated at 270 TH/s and 3,645 W (13.5 J/TH). It runs on 220–277 V single-phase power.
- Hashrate
- 270TH/s
- Power
- 3,645W
- Efficiency
- 13.5J/TH
- Cooling
- Air-cooled
- Coins
- BTC, BCH, BSV
- Input voltage
- 220–277 V
Retail price
$2,944.05
per unit · $10.90 per TH/s
- 1–4 units$2,944.05
- 5+ unitsVolume pricing available
View volume pricingVolume pricing
| 1–4 units | $2,944.05 |
|---|---|
| 5–19 units | Volume pricing on request |
| 20–99 units | Request Quote |
| 100+ units | Contact Mining Sales |
- Ships in
- 5–10 business days
$2,944.05Free standard shipping. Excludes duties and taxes
- Manufacturer
- Bitmain
- Model
- S21 XP
- Algorithm
- SHA-256
- Condition
- New
Product overview
The Antminer S21 XP is an air-cooled Bitcoin miner from Bitmain, rated at 270 TH/s and 3,645 W (13.5 J/TH). It runs on 220–277 V single-phase power.
Condition: New.
270 TH/s
Rated hashrate
13.5 J/TH
Energy per terahash
Air-cooled
Cooling method
3,645 W
Power draw at the wall
Technical specifications
Specifications as published by the manufacturer · last verified October 1, 2026 · Bitmain documentation
Fields the manufacturer does not publish are left out rather than estimated.
Performance
| Hashrate | 270 TH/s (±3%) |
|---|---|
| Power consumption | 3,645 W (±5%) |
| Efficiency | 13.5 J/TH |
| Algorithm | SHA-256 |
| Supported coins | BTC, BCH, BSV |
Power & electrical
| Input voltage | 220–277 V AC |
|---|---|
| Electrical phase | Single-phase |
| Input frequency | 50-60 Hz |
| Maximum input current | 20 A |
Cooling
| Cooling type | Air-cooled |
|---|---|
| Noise level | 76 dB |
Physical & environment
| Dimensions (L × W × H) | 450 × 219 × 293 mm |
|---|---|
| Net weight | 18.7 kg |
| Packaged dimensions | 630 × 350 × 430 mm |
| Gross weight | 21.5 kg |
| Operating temperature | -20–45 °C |
| Storage temperature | -20–70 °C |
| Operating humidity (non-condensing) | 10–90 % RH |
| Maximum altitude | 2,000 m |
Connectivity
| Network interface | RJ45 Ethernet 10/100M |
|---|
General
| Manufacturer warranty | 365 days from the shipping date |
|---|
Mining economics
Estimate output and operating cost for the Antminer S21 XP at your own power price. Results are calculations from the inputs shown, not a forecast.
Estimated results (per miner, at $0.06/kWh)
- Est. revenue / day
- $9.58
- 0.00011886 BTC mined / day
- Electricity cost / day
- $5.25
- 87.5 kWh × $0.06
- Operating result / day
- $4.34
- Revenue less electricity
- Revenue / 30 days
- $287.55
- Electricity / 30 days
- $157.46
- Operating result / 30 days
- $130.08
- Energy / day
- 87.5 kWh
- Energy / 30 days
- 2,624 kWh
- Break-even electricity
- $0.110/kWh
Estimates only. Not financial advice. Results vary with network difficulty, pool fees, uptime, market conditions, the Bitcoin price and the cost of electricity. They are calculated from the inputs shown at constant difficulty and price, and leave out the cost of the hardware, cooling, downtime, taxes and depreciation.
Network data as of 2026-10-28 13:00 UTC · price: mempool.space · difficulty: mempool.space · block reward 3.1391 BTC
Electricity cost by power price
Daily and 30-day electricity cost of Antminer S21 XP at 3,645 W, with the estimated revenue beside it.
| Electricity price | Electricity / day | Electricity / 30 days | Est. revenue / day | Est. net / day |
|---|---|---|---|---|
| $0.03/kWh | $2.62 | $78.73 | $9.58 | $6.96 |
| $0.05/kWh | $4.37 | $131.22 | $9.58 | $5.21 |
| $0.06/kWhselected | $5.25 | $157.46 | $9.58 | $4.34 |
| $0.07/kWh | $6.12 | $183.71 | $9.58 | $3.46 |
| $0.10/kWh | $8.75 | $262.44 | $9.58 | $0.84 |
| $0.12/kWh | $10.50 | $314.93 | $9.58 | -$0.91 |
| $0.15/kWh | $13.12 | $393.66 | $9.58 | -$3.54 |
| $0.20/kWh | $17.50 | $524.88 | $9.58 | -$7.91 |
Compare miners
How the Antminer S21 XP compares with the closest alternatives by cooling type and efficiency.
| Model | Hashrate | Power | Efficiency | Cooling | Price | $/TH | Side by side |
|---|---|---|---|---|---|---|---|
| Antminer S21 XP (this miner) | 270 TH/s | 3,645 W | 13.5 J/TH | Air-cooled | $2,944.05 | $10.90 | |
| WhatsMiner M70S 248T | 248 TH/s | 3,348 W | 13.5 J/TH | Air-cooled | $3,062.80 | $12.35 | Side by side |
| Touch 1.6T | 1.6 TH/s | 22 W | 13.8 J/TH | Air-cooled | $474.05 | $296.28 | Side by side |
| Avalon A16 282T | 282 TH/s | 3,900 W | 13.8 J/TH | Air-cooled | $4,416.55 | $15.66 | Side by side |
| Whatsminer M70 240T | 240 TH/s | 3,140 W | 13.1 J/TH | Air-cooled | $2,554.55 | $10.64 | Side by side |
Written comparisons: S21 Pro 234T vs S21 XP, S23 vs S21 XP, S21 XP vs A3 Pro Air, S21 XP vs S21+
Shipping
Standard shipping is free to every destination we ship to. If you need it faster, choose express shipping at checkout and we quote it before you pay. Import duties, taxes and customs clearance are set by the destination country and are the importer's responsibility unless your quotation states otherwise.
- Package dimensions
- 630 × 350 × 430 mm
- Gross weight
- 21.5 kg
Documentation
Links open the manufacturer's own documentation on the manufacturer's website.
Antminer S21 XP questions
How much electricity does the Antminer S21 XP use?
The Antminer S21 XP draws 3,645 W at the wall (±5%). Running continuously that is about 87.5 kWh per day and 2,624 kWh per 30 days. Multiply by your electricity price to get the running cost, or use the calculator.
What is the hashrate and efficiency of the Antminer S21 XP?
Rated hashrate is 270 TH/s (±3%) at 13.5 J/TH. Lower J/TH means less energy per unit of hashrate. See Understanding J/TH.
What voltage does the Antminer S21 XP need?
Input voltage is 220–277 V AC, single-phase at 50-60 Hz. It cannot run on a 110–120 V household circuit. Confirm your supply, breaker and cabling with a qualified electrician before ordering. See Bitcoin miner power requirements.
How is the Antminer S21 XP cooled?
The Antminer S21 XP is air-cooled with built-in fans. It needs a steady supply of cool intake air and a path to exhaust hot air. Rated noise is 76 dB. Compare options in Air vs hydro Bitcoin miners.
How loud is the Antminer S21 XP?
The manufacturer rates it at 76 dB. That is industrial-level noise and unsuitable for a living space without a dedicated, sound-treated enclosure.
Can I order the Antminer S21 XP in bulk?
Yes. Orders are handled by quantity: small quantities through checkout when a price is published, and larger quantities by quotation with pricing, batch and logistics confirmed by sales. Request a wholesale quote.
Similar miners
The closest alternatives by cooling type and efficiency.
Bitaxe
Touch 1.6T
AvailableNew- Hashrate
- 1.6TH/s
- Power
- 22W
- Efficiency
- 13.8J/TH
- Air-cooled
- SHA-256
$474.05$296.28/TH
Canaan
Avalon A16 282T
AvailableNew- Hashrate
- 282TH/s
- Power
- 3,900W
- Efficiency
- 13.8J/TH
- Air-cooled
- SHA-256
$4,416.55$15.66/TH
MicroBT
Whatsminer M70 240T
AvailableNew- Hashrate
- 240TH/s
- Power
- 3,140W
- Efficiency
- 13.1J/TH
- Air-cooled
- SHA-256
$2,554.55$10.64/TH
Related
- Antminer S21 XP - Specs, Power, Cooling and Who It SuitsGuide
- Bitmain Antminer minersManufacturer
- Antminer S21 SeriesSeries
- Air-cooled minersCategory
- S21 XP profitability calculatorTool
- Electricity cost & break-even tableTool
- Wholesale ASIC mining equipmentBulk orders
- ASIC partsSpares
- Understanding J/THGuide
Wholesale & project supply
Need the Antminer S21 XP in volume?
Send quantity, destination and required date. Sales replies with batch availability, unit pricing and freight options for your order size.
- 20+ units
- Mixed models
- Container orders
- Project procurement
Antminer S21 XP
$2,944.05