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MicroBT
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ASIC
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Sha256
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RELEASED JUN 2019
MicroBT Whatsminer M21S — ROI calculator
Profit /day
$-5.59
Income /day
$2.47
0.00002494 BTC/day
Cost $8.06 @ $0.1/kWh
Hashrate
56Th/s
Sha256
Power · Efficiency
3360.0W
60.00 j/Th
MicroBT Whatsminer M21S loses up to $5.59 a day, best on Sha256 hashpower sale. Also available: mining Sha256 at 56 Th/s ($-6.05/day). Pulling 3,360 W from the wall — at $0.10/kWh, not quite breaking even at today's rates.
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4 minutes ago
Similar miners ↓
Tap to switch · 7 sections ROI calculator 6/7
ROI calculator
ROI calculator for MicroBT Whatsminer M21S
Model payback, electricity, and first-year return for this rig.
Hardware cost
$5,000
Electricity rate
$0.10/kWh
Runtime per day
24
Pool fee
2.0%
Difficulty growth /yr
+0%
Net profit /day
$0.00
after electricity & fees
Payback period
—
—
First-year return
$0
—
Projected cumulative profit
The line crosses $0 on the day you break even. Everything above is pure profit.
Monthly P&L · 3-year horizon
Capital cost is booked in month 1. Cumulative columns include the rig purchase, so Net goes positive at true breakeven.
| Month | Earned (mo) | Cost burned (mo) | Cumulative earned | Cumulative cost | Net | % ROI |
|---|
Profit vs cost
cost 401.0%
Tap to switch · 7 sections ROI calculator 6/7
ROI calculator
ROI calculator for MicroBT Whatsminer M21S
Model payback, electricity, and first-year return for this rig.
Hardware cost
$5,000
Electricity rate
$0.10/kWh
Runtime per day
24
Pool fee
2.0%
Difficulty growth /yr
+0%
Net profit /day
$0.00
after electricity & fees
Payback period
—
—
First-year return
$0
—
Projected cumulative profit
The line crosses $0 on the day you break even. Everything above is pure profit.
Monthly P&L · 3-year horizon
Capital cost is booked in month 1. Cumulative columns include the rig purchase, so Net goes positive at true breakeven.
| Month | Earned (mo) | Cost burned (mo) | Cumulative earned | Cumulative cost | Net | % ROI |
|---|
Frequently asked
About the MicroBT Whatsminer M21S
Is the MicroBT Whatsminer M21S profitable?
As of October 2026, the MicroBT Whatsminer M21S earns $-6.05/day mining Sha256 at an electricity cost of $0.1/kWh. At this electricity rate it is not profitable.
What is the payback period for the MicroBT Whatsminer M21S?
Payback equals hardware cost divided by daily profit. The ROI calculator on this page projects payback months for the MicroBT Whatsminer M21S at $0.1/kWh — adjust the electricity rate and the hardware cost to match your scenario. Most miners aim for 12–24 month payback on new hardware.
What's the break-even electricity rate for the MicroBT Whatsminer M21S?
Break-even electricity is the rate above which the MicroBT Whatsminer M21S stops being profitable. The calculator below derives it from the rig's revenue and power draw — anything below this rate yields positive daily profit, anything above turns the rig into a net loss.
