Unit cost calculator
Cost of a single produced unit from materials, labour and overhead.
Fill in the fields and the result will appear here automatically.
Average unit cost divides the selected batch costs by its count of usable units. Materials, labour and allocated overhead must all refer to that batch. A larger batch spreads only costs that actually remain fixed; the calculator does not assume this automatically. Material share measures sensitivity: with other costs and output unchanged, a 10% increase in material cost raises the total by 10% of that share.
How it works
Formula and logic
Cost per unit = (materials + labour + overhead) ÷ units. The materials share is materials divided by the total cost, shown as a percentage. Batch size is a positive whole count. If all three costs are zero, unit cost is zero and material share is omitted because its denominator is zero. This is an average allocated cost, not the marginal cost of one extra unit.
Example
Materials 240,000, labour 96,000 and overhead 54,000 across 1,500 units give 260 per unit. Zero total cost for 10 usable units gives unit cost 0; material share is omitted.
Fields and units
- Materials — $
- Labour — $
- Overhead — $
- Units produced — unitless
How to use
- — Enter the cost of materials for the whole run.
- — Enter the labour cost for the same run.
- — Enter the overhead allocated to the run.
- — Enter how many units the run produced.
- — When changing batch size, update materials and labour to the actual scenario; do not hold them fixed if purchases and work hours increase.
Method and limitations
- Calculation method
- Formula and logic
- Data or methodology source
- IFRS IAS 2: public overview of inventory costs and recognised losses
- Limitation
- Average cost of the selected batch in one currency without exchange. Not marginal cost or a universal recommended price.
FAQ
Which costs belong in overhead here?
Everything the run consumed without being part of the product: rent for the production floor, equipment depreciation, supervision. Company-wide costs such as marketing usually do not belong in the unit cost.
Why does the unit cost fall when the run gets bigger?
Only with suitable cost behaviour. If material and labour per unit stay constant and batch overhead stays fixed, overhead per unit falls. If overhead also grows with output or prices change, lower unit cost is not guaranteed.
Should defective units be counted in the run size?
For usable-output average cost, use usable units. Abnormal waste and defective-unit costs should not automatically be capitalised into inventory; treatment depends on the applicable accounting rules. Define the batch-cost basis first.
Is this the price I should charge?
No. Average production cost helps assess margin but is not a universal price floor or a pricing recommendation. Selling costs, taxes, demand, incremental orders and spare capacity need separate analysis.