Core formulas
The formulas to keep straight
unit cost = full batch cost / sellable unitsfull batch cost = materials + labor + packaging + overhead + wastesellable units = produced units - damaged units - test unitsselling price = unit cost / (1 - target margin - fee rate)What is the unit price formula?
The unit price formula is full batch cost divided by sellable units. Full batch cost includes materials, labor, packaging, overhead, and normal waste.
Use sellable units, not produced units. If a batch makes 120 units but only 110 can be sold, the cost must be spread across 110.
The unit-cost example was checked July 3, 2026.
Unit price example, checked July 3, 2026
| Line | Amount | Note |
|---|---|---|
| Materials | $540 | Batch materials |
| Labor | $240 | Production and packing time |
| Packaging | $80 | Unit packaging |
| Waste and damaged units | $40 | Normal production loss |
| Full batch cost | $900 | Cost numerator |
| Sellable units | 110 | Cost denominator |
| Unit cost | $8.18 | $900 / 110 |
Why should waste change unit price?
Waste changes unit price because the business paid for the wasted material and time. If the unit cost ignores damaged or test units, every sellable unit is priced too low.
In the example, dividing $900 by 120 produced units gives $7.50. Dividing by 110 sellable units gives $8.18. That $0.68 gap matters when margins are thin.
Waste should not be hidden or treated as a one-time accident when it happens regularly.
Produced vs sellable unit comparison, checked July 3, 2026
| Denominator | Unit cost | Problem |
|---|---|---|
| 120 produced units | $7.50 | Counts units that cannot sell |
| 110 sellable units | $8.18 | Prices the true sellable output |
| Difference | $0.68 | Hidden cost per unit |
How does unit cost become selling price?
Unit cost becomes selling price after you add margin and fees. If unit cost is $8.18, target margin is 40%, and the fee rate is 6.5%, the price is $8.18 divided by 53.5%, or $15.29.
The unit cost is not the price. It is the floor the price must clear before profit exists.
Use the product pricing calculator after the unit-cost step.
- Calculate unit cost from sellable units.
- Add fees and target margin.
- Check market price only after the cost floor is known.
- Recalculate when waste, labor, or packaging changes.
Decision table
Unit-price decision table, checked July 3, 2026
| Situation | Use this denominator | Why |
|---|---|---|
| All units sellable | Produced units | No waste adjustment needed |
| Some damaged units | Sellable units | Damaged units still cost money |
| Test batch | Expected sellable units | Tests are part of learning cost |
| Custom job | Units accepted by client | Rejected units reduce real yield |
Worked examples
Examples you can compare against your own numbers
Example: batch cost to unit cost
A batch costs $900 and has 110 sellable units.
| Full batch cost | $900.00 | |
|---|---|---|
| Produced units | 120 | |
| Sellable units | 110 | |
| Correct unit cost | $8.18 | |
| Incorrect produced-unit cost | $7.50 |
Takeaway: The damaged units still cost money, so the sellable units carry that cost.
Action checklist
Before you use this number in the real business
- 1Add material, labor, packaging, overhead, and waste.
- 2Count produced units.
- 3Subtract damaged, test, or unsellable units.
- 4Divide full batch cost by sellable units.
- 5Use unit cost in the selling-price formula.
Common mistakes
Mistakes that make the answer look better than reality
FAQs
Questions people ask before making the decision
How do I calculate unit price?
Add the full batch cost and divide by sellable units. Use sellable units, not produced units.
Should labor be included in unit cost?
Yes. Labor tied to making, finishing, and packing the batch belongs in unit cost.
What is the difference between unit cost and unit price?
Unit cost is what the item costs to make. Unit price is what the customer pays.
How do I handle waste?
Include normal waste in batch cost and divide by sellable units.
Can I use unit cost for services?
Yes, if the service has repeatable cost per job. Use hours and direct job costs as the cost basis.
Sources and notes
Where the assumptions come from
General cost, margin, fee, and pricing workflow used in these examples.
How FeeProofed checks formulas, examples, source notes, and calculator-backed guide content.