Quick Answer — Is Bitcoin Mining Profitable Right Now?
Daily profit is (your share of global hashrate × block reward × 144 blocks/day × BTC price × (1 − pool fee)) − (power draw in kW × 24 hours × electricity rate). Everything else in mining economics is a variation on that one equation.
Quick reference (Antminer S21, 200 TH/s, 3,500W, 17.5 J/TH, network at 915 EH/s, BTC at $64,103, 3.125 BTC block reward, 1% pool fee):
- At $0.08/kWh (the roughly break-even 2026 rate for this hardware) → -$0.48/day (a loss)
- At $0.05/kWh → +$2.04/day (~$745/year)
- At $0.03/kWh → +$3.60/day (~$1,315/year)
The break-even electricity rate for this specific hardware and network condition works out to about $0.0743/kWh — below that rate, the S21 is profitable; above it, it loses money every single day it runs. That single number is the most useful output of this entire calculator, because it turns a wall of daily-profit noise into one comparison point against your actual power bill.