Antminer S21 XP electricity cost
The reference 3,645.0 W load consumes 87.48 kWh per full day. At $0.08/kWh that is $7.00 per day, $209.95 per 30-day month and $2,554.42 per year. These are calculated costs, not manufacturer claims.
BITMAIN · 270 TH/S REFERENCE VARIANT
Antminer S21 XP Calculator
270 TH/s nominal specification at 25°C. Real wall power varies with temperature and firmware.
- Manufacturer hashrate
- 270 TH/s
- Manufacturer power
- 3,645.0 W
- Manufacturer efficiency
- 13.5 J/TH
- Algorithm
- SHA-256
Data last checked: 2026-09-27. Manufacturer specification source: official reference ↗. Unknown fields remain unverified.
YOUR INPUTS USD
$0.00$0.30/kWh
CALCULATED RESULTS 30-day month
- Energy / day
- 87.48 kWh
- Electricity / day
- $7.00
- Electricity / month
- $209.95
- Electricity / year
- $2,554.42
- Estimated BTC / day
- 0.00012850
- Gross revenue / day
- $10.82
- Pool fees / day
- $0.22
- Operating profit / day
- $3.60
- Operating profit / month
- $108.05
- Operating profit / year
- $1,314.64
- Break-even electricity
- $0.1212/kWh
- Break-even BTC price
- $55,573.81
- Simple hardware payback
- Enter hardware price
- Annual operating return
- Unavailable
Source: current user inputs and published formulas. Last updated: on each input change.
Assumes current network conditions remain constant. Estimates exclude taxes, financing, repairs and resale value.
Last updated: . Source: mempool.space — BTC/USD price, mempool.space — estimated network hashrate and current difficulty, mempool.space — mean fees of latest 10 confirmed blocks; subsidy derived from next height.
Profitability at this hashrate
The 270 TH/s reference contributes 270,000,000,000,000 hashes per second to the difficulty-based model. Expected BTC production requires difficulty, subsidy and estimated block fees. The calculator above displays revenue only when those values and a BTC price have a valid source.
Run a Antminer S21 XP revenue scenario →Break-even electricity
At full uptime, divide daily proceeds after pool fees by 87.48 kWh to obtain this reference’s operating tariff threshold. Each $0.01/kWh adds $0.87 per day to the electricity bill. Hardware recovery and hosting fees are separate.
Efficiency: rated and calculated
The manufacturer lists 13.50 J/TH. Dividing the reference power by hashrate gives 13.5000 J/TH. Small differences can result from nominal specification rounding; compare values at the same operating point.
Heat output
3,645.0 W corresponds to 12,437.3 BTU/hour. Nearly all electrical input ultimately becomes heat. Running power determines peak heat even when average uptime is reduced.
Cooling requirements
The reference heat load is 1.036 cooling tons. At 25°C intake and 35°C exhaust, the ideal all-air equivalent is 1,088 m³/h. This excludes pressure loss, humidity, altitude and recirculation. Hydro references require separate coolant engineering.
Operating cost beyond ASIC power
Adding an illustrative 10% facility-power allowance to this reference adds $0.70 per day at $0.08/kWh. It does not increase the 270 TH/s nominal hashrate. Hosting management, repairs and capital must be entered separately.
Add this model to a farm scenario →Methodology
Daily kWh = watts ÷ 1,000 × 24 × uptime. BTC/day uses difficulty × 2³² expected hashes per block. Heat = watts × 3.412142 BTU/hour. Assumes current network conditions remain constant.
Read formulas, limits and omitted costs →Frequently asked questions
Which Antminer S21 XP variant is used?
270 TH/s reference variant. 270 TH/s nominal specification at 25°C. Real wall power varies with temperature and firmware.
How much electricity does this Antminer S21 XP use in a day?
87.48 kWh at the reference running power and 100% uptime. Change watts or uptime in the calculator for your measured scenario.
Does a positive operating estimate recover the hardware price?
No. Operating profit excludes capital. Enter your purchase price and use simple payback; future network conditions are not guaranteed.
Interactive cooling scenario
Loading cooling inputs…
Electricity sensitivity table
Fixed reference scenario: Antminer S21 XP, 3,645.0 W, 100% uptime, 2% pool fee. Interactive inputs above do not overwrite this reference table.
| Rate / kWh | kWh / day | Electricity / day | Electricity / month | Electricity / year | Revenue / day | Profit / day | Profit / month |
|---|---|---|---|---|---|---|---|
| $0.03 | 87.48 | $2.62 | $78.73 | $957.91 | $10.82 | $7.98 | $239.27 |
| $0.04 | 87.48 | $3.50 | $104.98 | $1,277.21 | $10.82 | $7.10 | $213.03 |
| $0.05 | 87.48 | $4.37 | $131.22 | $1,596.51 | $10.82 | $6.23 | $186.78 |
| $0.06 | 87.48 | $5.25 | $157.46 | $1,915.81 | $10.82 | $5.35 | $160.54 |
| $0.07 | 87.48 | $6.12 | $183.71 | $2,235.11 | $10.82 | $4.48 | $134.30 |
| $0.08 | 87.48 | $7.00 | $209.95 | $2,554.42 | $10.82 | $3.60 | $108.05 |
| $0.09 | 87.48 | $7.87 | $236.20 | $2,873.72 | $10.82 | $2.73 | $81.81 |
| $0.10 | 87.48 | $8.75 | $262.44 | $3,193.02 | $10.82 | $1.85 | $55.56 |
| $0.12 | 87.48 | $10.50 | $314.93 | $3,831.62 | $10.82 | $0.10 | $3.08 |
| $0.15 | 87.48 | $13.12 | $393.66 | $4,789.53 | $10.82 | $-2.52 | $-75.66 |
| $0.20 | 87.48 | $17.50 | $524.88 | $6,386.04 | $10.82 | $-6.90 | $-206.88 |
Source: the cited reference power and published formulas. Manufacturer data last checked: 2026-09-27. Revenue is a dated scenario using the snapshot below, not a continuously updated quote. Assumes current network conditions remain constant.
Network snapshot last updated: 2026-09-29T12:30:05.000Z. Source: mempool.space — BTC/USD price mempool.space — estimated network hashrate and current difficulty mempool.space — mean fees of latest 10 confirmed blocks; subsidy derived from next height . Refresh the page to request a newer snapshot.
Data sources and field provenance
Data last checked: 2026-09-27. Manufacturer specification source: official reference ↗.
| Field | Value | Source | Checked |
|---|---|---|---|
| hashrate | 270 | Bitmain | 2026-09-27 |
| powerWatts | 3645 | Bitmain | 2026-09-27 |
| efficiencyJTH | 13.5 | Bitmain | 2026-09-27 |
| algorithm | SHA-256 | Bitmain | 2026-09-27 |
| releaseDate | Not verified | Unknown | Not verified |
| coolingType | air | Bitmain | 2026-09-27 |
| noiseDb | Not verified | Unknown | Not verified |
| dimensions | Not verified | Unknown | Not verified |
| weightKg | Not verified | Unknown | Not verified |
Unknown source URLs are null. Record-level references were preserved from the initial review; no new manufacturer verification date is invented. Read the source policy →
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