How to Use the Mining Profitability Reality Check Calculator

A mining calculator is only as honest as the assumptions inside it.

The Orange Signal Mining Profitability Reality Check is built to make the boring variables visible: power, uptime, fees, hosting, repairs, and hashprice. Most calculators online quietly assume perfect uptime, zero fees, and no maintenance — which makes every machine look like a money printer. Ours does not.

The direct answer

Open the calculator and fill in eight inputs:

1. Hashrate (TH/s)
2. Power draw (watts)
3. Power rate ($/kWh)
4. Hashprice ($/TH/day)
5. Uptime (%)
6. Pool fees (%)
7. Hosting cost (if applicable)
8. Repair reserve

Pull today's hashprice from the Hashprice Weather Report — never use a number you saw last month. Then read the four outputs: net per day, net per month, margin, and break-even power rate. The most useful habit is to change one variable at a time and watch which one moves the number most. For most operators, that variable is power rate, not hashprice.

What each input actually means

Hashrate (TH/s). This is your machine's rated output — but use the realistic number, not the spec sheet. Older units and units running in heat often underperform their rating. Compare rated specs across models on the ASIC page before you type one in.

Power draw (watts). The wall draw, not the chip draw. A miner rated at 3,250W on the box may pull more once you account for the PSU and ambient heat. If you have a meter, use the measured figure.

Power rate ($/kWh). This is the single most important number in the whole tool. Your all-in rate includes delivery, demand charges, and taxes — not just the energy line on your bill. Home hobbyists and industrial sites can be an order of magnitude apart here, and that gap decides almost everything. We dig into why in Mining Profitability Is a Power-Rate Story.

Hashprice ($/TH/day). This is what the network pays you per unit of hashrate per day, blending block subsidy, fees, price, and difficulty into one number. It changes constantly. Always grab the current figure from the Hashprice Weather Report rather than guessing. For the full concept, see What Hashprice Is and Why Miners Obsess Over It.

Uptime (%). The fraction of the period your machine is actually hashing. More on why this is non-negotiable below.

Pool fees (%). Most pools take 1–3%. Small, but it comes off the top, so include it.

Hosting cost. If you host at a facility, enter the per-kWh or per-machine fee your contract uses, so the tool isn't double-counting power.

Repair reserve. Hardware breaks. We treat this as a planning line, not an afterthought — see the repairs section below.

How to read the outputs

The calculator gives you four numbers. Here is how an operator reads them:

• Net per day / net per month. Revenue minus all costs. If net per day is thin, a single difficulty increase or price dip can flip it negative.
• Margin. Net as a percentage of revenue. A 10% margin has almost no cushion; a 50% margin can absorb a rough month. Margin is your shock absorber.
• Break-even power rate. The killer feature: the $/kWh at which this machine earns exactly zero at today's hashprice. If your real rate is well under break-even, you have room. If it's close, you're one bad week from a loss. When price falls, that gap closes fast — see When Bitcoin's Price Drops, What Happens to Mining Margins?.

A useful drill: note your break-even power rate today, then re-run it with hashprice 20% lower. Watching break-even drop toward your actual rate shows how much margin is real and how much is borrowed from a good market.

Why uptime matters

A miner that is off is not earning. Heat, network drops, repairs, curtailment, and facility problems all show up as uptime loss — and the tool takes uptime as a straight multiplier on revenue while many of your costs (hosting, financing, rent) keep running whether the machine hashes or not.

Perfect uptime assumptions make bad deals look better than they are. If your site realistically runs at 95% rather than 100%, type 95. The difference between those two numbers over a year is real money, and it's the kind of optimism that turns a "profitable" spreadsheet into a losing operation.

Why repairs belong in the math

Repairs are not random noise. They are part of operating hardware at scale.

If a plan ignores fan failures, PSU issues, hashboard faults, and the downtime that comes with them, the profitability math becomes fantasy. A fleet running hot will see more failures, and each failure is both a repair cost and an uptime hit — it gets counted twice.

For planning, a monthly repair reserve per machine is a reasonable way to model it. When you're deciding whether a specific dead unit is worth fixing, run its expected post-repair earnings through the calculator and compare against the repair quote — that's covered in ASIC Repair vs. Replace.

Use it as a scenario tool, not a crystal ball

The number the calculator gives you is an estimate of today under your assumptions — not a forecast. Difficulty and price move, and so will your result.

The right way to use it is to build a few scenarios — a good market, a flat market, a rough market — and see whether your operation survives all three. The tool gives the number; the linked articles explain why it moves.

FAQ

Is the calculator financial advice?

No. It is an educational estimate based on the inputs you provide. It does not predict price, difficulty, or your actual results, and nothing here is financial, tax, or investment advice.

What variable should I stress test first?

Power rate and uptime. Those two can quietly destroy a mining plan. Hashprice gets the attention, but for most operators a high power rate is the bigger long-term threat because you can't change it as easily as you can change machines.

Where do I get today's hashprice number?

From the Hashprice Weather Report. It updates as the market moves. Don't reuse a figure from a screenshot or an old article — hashprice can swing meaningfully week to week.

Should repair costs be monthly or per incident?

For forward planning, a monthly reserve per machine smooths things out and is easy to model. For actual accounting, track real incidents and the downtime each one caused — that's the data that tells you whether your reserve estimate was right.

Can I use this to compare two different ASIC models?

Yes. Pull the rated hashrate and watts for each model from the ASIC page, run each through the calculator at the same power rate and hashprice, and compare net per month and break-even rate side by side. That comparison is far more honest than comparing sticker hashrate alone.

Sources

• mempool.space — live difficulty, fees, and network data
• Hashrate Index — hashprice and mining market data
• Braiins / Bitcoin mining resources — pool and miner operation references

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