Is this the exact electricity bill?

No, it's an estimate: a kiln doesn't draw full power for the whole firing. For a more accurate picture, use the actual kWh from a meter or firing log.

How do I split costs across customers?

Divide the firing costs by the number of pieces, or by the share of the kiln someone uses. In Werkbank this happens per firing (from Werkbank plan).

Which electricity price do I enter?

The price per kWh on your energy contract, including taxes if you pass those on as well.

Firing cost calculator

You calculate firing costs like this: kiln power (kW) × firing time (hours) × electricity price (€ per kWh). Divide by the number of pieces for the cost per piece. Work it out directly below.

Calculate it yourself

Kiln power (kW)Firing time (hours)Electricity price (€ per kWh)Number of pieces in the load

Total firing cost€13.44

Cost per piece€0.67

Find your kiln's power on its rating plate, and your kWh price on your energy bill.

How the calculation works

Look up your kiln's power (in kW, on the rating plate).
Multiply by the firing time in hours and by your electricity price per kWh.
Divide by the number of pieces in the firing for the cost per piece.

In Werkbank, firing costs are calculated per firing and split across your customers (from Werkbank plan). See it in the demo

What this doesn't account for

A kiln draws more power while heating up than while holding temperature — so this is an estimate, not an exact measurement. For real accuracy, a smart plug that logs actual usage per firing helps.

Want this tracked automatically per customer?

Werkbank automatically splits the real firing cost across the loaded batches and tracks an outstanding balance per customer — no scale, no spreadsheet.

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