Short answer: at a household tariff, no. Not because the machines are bad, but because the kWh costs two to four times what the machine can repay. Here are the numbers, machine by machine, tariff by tariff.
Net per day, after electricity only. Green when the machine pays for its power, red when it does not.
| Model | J/TH | kWh/day | Gross | Break-even | $0.05 | $0.07 | $0.10 | $0.18 | $0.25 |
|---|---|---|---|---|---|---|---|---|---|
| Antminer S21 | 17.5 | 84.0 | $6.73 | $0.0801 | +$2.53 | +$0.85 | -$1.67 | -$8.53 | -$14.27 |
| Antminer S21 Pro | 15.0 | 84.2 | $7.87 | $0.0934 | +$3.66 | +$1.97 | -$0.55 | -$7.43 | -$13.19 |
| Whatsminer M60S | 18.5 | 82.6 | $6.26 | $0.0758 | +$2.13 | +$0.48 | -$2.00 | -$8.74 | -$14.39 |
| Avalon A1466 | 21.5 | 77.5 | $5.05 | $0.0651 | +$1.17 | -$0.38 | -$2.71 | -$9.03 | -$14.33 |
| Antminer S19 Pro | 29.5 | 78.0 | $3.70 | $0.0474 | -$0.20 | -$1.76 | -$4.10 | -$10.46 | -$15.80 |
| Antminer S19j Pro | 29.5 | 73.6 | $3.50 | $0.0475 | -$0.18 | -$1.66 | -$3.86 | -$9.87 | -$14.91 |
| Antminer S19 | 34.0 | 78.0 | $3.20 | $0.0410 | -$0.70 | -$2.26 | -$4.60 | -$10.97 | -$16.30 |
Only the S21 Pro and the S21 stay positive, and only at $0.07/kWh or below. The 2020-era S19 is already negative at $0.05/kWh: it needs 34 J/TH where the S21 needs 17.5.
Three cases survive the arithmetic, and all three start with the kWh, not the machine:
Answer honestly; a single "no" on the first two is enough to stop.
If the answer to the first question is no, the machine will not fix it. The alternative is to have the hardware run where the kWh is billed at a professional rate: no room, no noise, no upfront purchase.
See what a hosted account returns →Referral code to enter by hand before any purchase: CALCULMINAGE, terms and method on the bonus page.
Almost never at a residential tariff. A 200 TH/s machine (17.5 J/TH) producing about $6.54 a day of bitcoin needs electricity below $0.0779/kWh to break even. The US residential average is $0.1816/kWh and most European households pay $0.25/kWh or more, so the same machine loses about $8.71 a day in the US and $14.46 a day in Europe, before hardware, noise and cooling.
Below the break-even of your machine: $0.0779/kWh for an Antminer S21, $0.0909 for an S21 Pro, $0.0633 for an Avalon A1466, and $0.0398 for an S19. These thresholds move with the bitcoin price and the network hashrate, which is why the site recomputes them live. In practice a household tariff with taxes and delivery is two to four times above them.
At today's price and network hashrate: about $6.54 a day for an S21 (84 kWh, hence the bill), $7.65 for an S21 Pro, $4.91 for an Avalon A1466 and $3.11 for an S19. Those are gross figures; subtract the kWh times your tariff and you get the net. Note that a 3.5 kW machine draws 84 kWh a day, roughly three times a typical US household.
Only if the panels are already paid for and their output would otherwise be exported for almost nothing. A 3.5 kW machine needs 84 kWh a day, which is far beyond the daily output of a typical residential array; a small unit well under 1 kW is the realistic match. Mining on grid power at night, or on a battery, brings the cost back to the grid tariff.
Not at residential prices, and the margin does not improve with scale: every extra machine adds the same negative margin. Scale helps only when the kWh is cheap and the hardware is fully amortised. Most home miners who stay profitable either have a sub-$0.08/kWh supply or run the machine for its heat in winter and count the gas or electric heating they no longer pay for.
The calculator takes any hashrate, any efficiency in W/TH and any tariff and shows the break-even on the same screen. The ASIC model pages give the specification, the daily output and the threshold of each machine; the hashrate tiers answer the same question by power level; the country pages compare residential rates across Europe.
Nothing here is investment advice. Mining is an asset, not a guaranteed yield: difficulty rises, the bitcoin price can fall, hardware wears out. Commit only what you can lose entirely.