Profitability methodology

Expected earnings

Your expected daily BTC mined is your share of the network’s total hashrate, multiplied by the BTC paid out per day:

expectedBtcPerDay = (yourHashrate / networkHashrate)
                    × 144 blocks/day
                    × (blockSubsidy + avgTxFeesPerBlock)
                    × (1 − poolFeeRatio)

144 is the number of Bitcoin blocks per day at the 10-minute target. Block subsidy is a protocol constant that halves on schedule (see the halving countdown); average transaction fees per block come from a live snapshot, not a guess.

Electricity cost

dailyElectricityCostUsd = (powerW / 1000) × 24 hours × electricityUsdPerKwh

Break-even electricity price

The exact $/kWh at which daily electricity cost would equal daily revenue — above it you lose money, below it you profit:

breakEvenUsdPerKwh = (dailyBtcMined × btcPriceUsd) / ((powerW / 1000) × 24)

Cost to mine 1 BTC

costToMineOneBtcUsd = totalCostUsd / minedBtc

totalCostUsd and minedBtc must cover the same period (both daily, or both monthly) — the calculator always compares like periods.

Days to ROI

daysToRoi = hardwareCostUsd / dailyProfitUsd

A flat, non-compounding projection at today’s profit rate — not a promise. If dailyProfitUsd is zero or negative, this is reported as “never,” not a nonsense number.

Advanced mode: the month-by-month projection

Advanced mode re-runs the same per-block math above for each future month, but lets difficulty and price drift according to assumptions you set — this is the whole point of Advanced mode: naive calculators assume difficulty stays flat forever, which historically overstates long-run earnings.

difficulty_m = difficulty_0 × (1 + annualDifficultyGrowth)^(m/12)
price_m      = price_0 × (1 + annualPriceGrowth)^(m/12)
subsidy_m    switches automatically at each projected halving height

profit_m = mined_m × price_m × (1 − hodlRatio)
           + Δ(HODL stack value)          // mark-to-market on BTC already held
           − electricity_m − opex_m

NPV = Σ profit_m / (1 + monthlyDiscountRate)^m − capex

Hardware and infrastructure value depreciate on a straight-line schedule you set (%/year), independent of the profit math — they affect the “fully depreciated” month shown, not the profit figures themselves.

Data sources

All four are fetched by a scheduled job and stored — the calculator itself never calls an external API while you use it, so nothing you enter is exposed to a third party, and the page loads instantly. The same snapshot backs the /api/v1/network endpoint.

Questions