Simple Mode
Use average watts, hours per day, and electricity rate for a fast estimate.
NAS Power Cost Calculator
Estimate monthly, yearly, and long-term electricity costs for a NAS, home server, or storage setup.
c/kWh. Enter your own bill rate for better accuracy.
Preset values are planning estimates. For accurate results, use measured wattage from a wall power meter.
c/kWh.
Percent of active time.
Sleep watts are estimated as 30% of idle watts.
Include network gear
Apply solar offset
Setup A
Setup B
Comparison
| Metric | Setup A | Setup B | Difference |
|---|---|---|---|
| Monthly cost | — | — | — |
| Yearly cost | — | — | — |
| 5-year cost | — | — | — |
| Yearly energy | — | — | — |
| Annual emissions | — | — | — |
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How this NAS power cost calculator works
This calculator estimates running cost from power draw, daily operating hours, electricity rate, and currency. In Simple Mode, it uses average watts and hours per day. In Advanced Mode, it calculates a weighted average from idle watts, load watts, load percentage, sleep hours, optional network gear, and optional solar offset.
Compare Mode uses the same simple formula for two setups, then shows the monthly, yearly, five-year, energy, and emissions difference side by side.
Why idle power matters for 24/7 storage
A storage setup often runs all day, even when no one is actively copying files. That means idle watts can become one of the most important long-term cost factors. A 10W difference may look small, but it compounds every hour, every day, across the whole year.
Simple Mode vs Advanced Mode
Simple Mode is best when you only know the approximate average watts. Advanced Mode is better when you know idle and load power, or when your setup sleeps for part of the day. Compare Mode is useful before buying or rebuilding a storage setup because it shows how different average power levels affect long-term cost.
Advanced Mode
Model idle/load split, sleep schedule, network gear, and solar offset.
Compare Mode
Compare two setups side by side across monthly, yearly, and 5-year costs.
What affects NAS electricity cost?
The largest factors are average power draw, local electricity rate, and daily runtime. Drive count, HDD versus SSD storage, CPU and chipset efficiency, network switches, sleep schedule, workload pattern, and solar self-consumption can all change the real cost.
Does sleep mode really save money?
Sleep mode can reduce energy use, especially when a device would otherwise sit idle for many hours. The tradeoff is availability: some storage setups need to stay awake for backups, remote access, media services, surveillance recording, or automation tasks. Use Advanced Mode to test whether sleep hours make a meaningful difference for your usage pattern.
How to compare local storage cost with cloud storage
Electricity is only one part of local storage cost. Hardware, drives, maintenance, replacement cycles, and time also matter. Cloud storage often shifts the cost into recurring capacity and bandwidth fees. This calculator focuses on electricity-only cost so you can isolate one part of the decision before comparing total ownership cost.
Disclaimer: This calculator provides planning estimates only. Electricity rates, emissions factors, workload patterns, and hardware power draw vary by region, provider, device, drive count, sleep behavior, and configuration. Enter the rate from your own electricity bill and measured wattage from a wall power meter for the most accurate result.
