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Cost & Energy Tool

Energy Cost Calculator

Work out what your equipment costs to run — enter your own electricity rate and currency, add devices, and get monthly and yearly cost. Optional solar feed-in nets the cost against your export earnings.

Updated: July 6, 2026Planning reference

Quick Answer

Enter your own rate and currency — there is no built-in default or exchange rate.

Add devices with their power draw and usage pattern. Enter your electricity rate exactly as it appears on your bill, in your own currency. The calculator multiplies consumption by your rate — nothing is converted or assumed.

Rate & Currency

Your electricity rate

Enter the all-in rate from your bill — no default is filled in, since rates vary by country and contract.

Your rate incl. taxes & grid fees — it's on your electricity bill. Typical: DE ~0.36 · EU avg ~0.29 · Business ~0.19 €/kWh

Devices

Device list

Add each device's power draw and how often it runs.

DevicePowerUnitHours/dayDays/weekAlways onkWh/yr

Planning estimate

Results depend entirely on the rate and figures you enter. This is not a bill, not live pricing and not a full solar-economics model — self-consumption ratio, battery storage and time-of-use tariffs are not modelled.

Formula / Method

How the calculator works

Each device row converts power to kW, multiplies by hours/day, days/week and 52 weeks to get kWh/year, then sums all rows. Cost is consumption × your rate — in whichever currency you selected, with no conversion. When solar is enabled, feed-in credit (exported kWh × your feed-in rate) is subtracted to give net cost.

kWh/yr = kW × h/day × d/week × 52 · Cost = kWh × rate

Inputs

Required inputs

Currency, your electricity rate (no default — enter your own), and one row per device with power, unit (W/kW), hours/day and days/week (or "Always on" for 24/7 equipment). Solar feed-in is optional: exported kWh/year and your feed-in rate.

Uses

Where this helps

Estimating server/IT running cost, comparing appliance running costs at home, budget conversations before adding equipment, and rough payback checks against a solar feed-in tariff.

FAQ

Energy cost notes

Which rate do I enter?

Your all-in rate including taxes and grid fees — the number on your electricity bill, not the wholesale/spot market price. That's the rate you actually pay per kWh consumed.

I have solar — how does feed-in work?

You're typically paid a separate, usually lower, feed-in rate for kWh you export to the grid. Net cost is import cost minus feed-in earnings. Enter your own export volume and feed-in rate — both are site- and contract-specific, so nothing is assumed.

Why no automatic currency conversion?

Because you enter your real local rate, results are exact in your own currency straight away — there's no exchange rate to fetch, maintain or get wrong. Pick your currency purely for display and formatting.

Learn More

Reference links

Project

Need help with energy cost or efficiency planning?

ITCOREOPS can support energy audits, IT running-cost reviews, PUE improvement and infrastructure documentation.

Open project formVisit ITCOREOPS →

Disclaimer

Planning-level estimate

Uses only the rate and figures you enter — not a bill, not live pricing, not a full solar-economics model. Self-consumption ratio, battery storage and dynamic/time-of-use tariffs are not modelled; see the planned Solar PV Sizing tool for PV payback. Actual costs depend on your tariff, taxes, grid fees and contract.

Workflow

Check running cost before adding equipment or comparing tariffs.

Use this calculator to estimate what a device or a whole load list costs to run per month and year, in your own currency, before committing to new equipment or a tariff change.

Use exact inputs ↑

Feedback

Found a bug or calculation issue?

Report display problems, calculation issues or suggestions for improving this calculator.

Report a bug ✉

Worked example

Inputs: Server + switch, 250 W, always on (24 h × 7 days), rate 0.30 €/kWh, EUR, no solar.

Result: 0.25 kW × 24 × 7 × 52 = 2,184 kWh/yr (≈182 kWh/mo) →655.20 €/yr (≈54.60 €/mo).