A budget for the dates you actually use
Use a move-in date, project deadline or billing period rather than assuming every month has 30 days. Both dates are included. Daily operating hours apply on every date in the period. For irregular shifts, first use the runtime calculator and divide the resulting hours by the number of calendar days.
How the result is calculated
Active kWh = watts × daily operating hours × calendar days ÷ 1,000. Idle kWh = standby watts × (24 − daily operating hours) × calendar days ÷ 1,000. Total cost = (active kWh + idle kWh) × price per kWh. Standby power is counted only outside operating hours.
Example: a workstation over September
A 250 W workstation running eight hours per day from September 1 through September 30 uses 60 kWh while active. At 5 W during the other sixteen hours, it adds 2.4 kWh. Total use is 62.4 kWh; at 0.20 per kWh, the variable electricity cost is 12.48 in your selected currency.
Use measured draw, not just the power-supply label
A 750 W power supply does not mean a computer constantly consumes 750 W. For computers and servers, use a suitable plug-in meter or metered power distribution unit. Cycling appliances need average measured consumption. A nameplate maximum can be useful for a high-use scenario, but may overstate a typical bill.
When equipment runs around the clock
A 3,500 W device operating 24 hours per day for 30 days uses 2,520 kWh. At 0.12 per kWh the energy charge is 302.40. Continuous workloads such as servers and Bitcoin mining make the electricity rate especially important. Revenue, pool fees, network conditions and hardware costs require a separate profitability calculation.
What is outside this estimate
The result includes the variable per-kWh charge only. Add standing charges, demand charges, taxes not already included in your tariff, cooling and shared infrastructure separately. For time-of-use tariffs, run separate calculations for each rate period. The currency selector changes the label, not the exchange rate.
Questions about this calculation
Does this predict my full utility bill?
No. It estimates energy charges for the entered equipment. Fixed and demand charges are excluded.
Can I include cooling?
Add the average cooling power to the equipment running power, or calculate cooling separately when its schedule differs.
Can I use this for mining equipment?
Yes, for electricity budgeting. It does not predict Bitcoin revenue or guarantee a profitable mining operation.
Method and references
The calculations use the formulas shown above. Energy units and measurement principles can be checked against Australian Government guidance on energy ratings and running costs.
Published September 11, 2026. No live tariff, exchange-rate or revenue feed is used.