Antminer S21 Pro electricity cost
The reference 3,510.0 W load consumes 84.24 kWh per full day. At $0.08/kWh that is $6.74 per day, $202.18 per 30-day month and $2,459.81 per year. These are calculated costs, not manufacturer claims.
BITMAIN · 234 TH/S REFERENCE VARIANT
Antminer S21 Pro Calculator
234 TH/s reference from the multi-bin guide. The 220 and 245 TH/s variants have different power ratings.
- Manufacturer hashrate
- 234 TH/s
- Manufacturer power
- 3,510.0 W
- Manufacturer efficiency
- 15.0 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
- 84.24 kWh
- Electricity / day
- $6.74
- Electricity / month
- $202.18
- Electricity / year
- $2,459.81
- Estimated BTC / day
- 0.00011137
- Gross revenue / day
- $9.37
- Pool fees / day
- $0.19
- Operating profit / day
- $2.45
- Operating profit / month
- $73.43
- Operating profit / year
- $893.37
- Break-even electricity
- $0.1091/kWh
- Break-even BTC price
- $61,748.68
- 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 234 TH/s reference contributes 234,000,000,000,000 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 Pro revenue scenario →Break-even electricity
At full uptime, divide daily proceeds after pool fees by 84.24 kWh to obtain this reference’s operating tariff threshold. Each $0.01/kWh adds $0.84 per day to the electricity bill. Hardware recovery and hosting fees are separate.
Efficiency: rated and calculated
The manufacturer lists 15.00 J/TH. Dividing the reference power by hashrate gives 15.0000 J/TH. Small differences can result from nominal specification rounding; compare values at the same operating point.
Heat output
3,510.0 W corresponds to 11,976.6 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 0.998 cooling tons. At 25°C intake and 35°C exhaust, the ideal all-air equivalent is 1,048 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 $0.67 per day at $0.08/kWh. It does not increase the 234 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 Pro variant is used?
234 TH/s reference variant. 234 TH/s reference from the multi-bin guide. The 220 and 245 TH/s variants have different power ratings.
How much electricity does this Antminer S21 Pro use in a day?
84.24 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 Pro, 3,510.0 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 | 84.24 | $2.53 | $75.82 | $922.43 | $9.37 | $6.66 | $199.79 |
| $0.04 | 84.24 | $3.37 | $101.09 | $1,229.90 | $9.37 | $5.82 | $174.52 |
| $0.05 | 84.24 | $4.21 | $126.36 | $1,537.38 | $9.37 | $4.97 | $149.24 |
| $0.06 | 84.24 | $5.05 | $151.63 | $1,844.86 | $9.37 | $4.13 | $123.97 |
| $0.07 | 84.24 | $5.90 | $176.90 | $2,152.33 | $9.37 | $3.29 | $98.70 |
| $0.08 | 84.24 | $6.74 | $202.18 | $2,459.81 | $9.37 | $2.45 | $73.43 |
| $0.09 | 84.24 | $7.58 | $227.45 | $2,767.28 | $9.37 | $1.61 | $48.16 |
| $0.10 | 84.24 | $8.42 | $252.72 | $3,074.76 | $9.37 | $0.76 | $22.88 |
| $0.12 | 84.24 | $10.11 | $303.26 | $3,689.71 | $9.37 | $-0.92 | $-27.66 |
| $0.15 | 84.24 | $12.64 | $379.08 | $4,612.14 | $9.37 | $-3.45 | $-103.48 |
| $0.20 | 84.24 | $16.85 | $505.44 | $6,149.52 | $9.37 | $-7.66 | $-229.84 |
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 | 234 | Bitmain | 2026-09-27 |
| powerWatts | 3510 | Bitmain | 2026-09-27 |
| efficiencyJTH | 15 | 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 →
Related ASIC references
Curated comparisons
Related calculators
Electricity cost ↗
Turn wall power and your electricity tariff into daily, monthly and yearly running costs.
Mining profitability ↗
Estimate Bitcoin revenue, pool fees and operating profit using a sourced network snapshot.
ASIC ROI & payback ↗
Estimate simple hardware payback and annual operating return from your purchase price.
Mining heat output ↗
Convert ASIC electrical load into thermal output for room and facility planning.
Mining cooling ↗
Estimate the thermal load, cooling tons and ideal ventilation airflow for a group of miners.
Mixed mining farm ↗
Combine multiple ASIC models, facility overhead and hosting fees to estimate fleet energy, revenue and simple payback.