Rework Cost Calculator
Cost the extra labour, material and overhead spent making units good.
In short
Cost the extra labour, material and overhead spent making units good.
Formula: Rework cost = Units reworked × ((Rework hours per unit × Labour rate) + Material per unit + Overhead per unit) + Fixed rework cost
What this calculator does
Per-unit rework cost built from hours, material and overhead, multiplied by the units reworked, with any one-off cost added.
Use it to turn Currency, Units reworked, Rework labour hours per unit, Labour cost per hour, and the other shown inputs into a checked result you can compare, copy, or rerun with different assumptions.
The page shows the formula, a numeric worked example, and the assumptions that affect this professional & industry calculation.
Inputs and what they mean
- Currency
- — Amounts are shown in the currency you pick. No exchange rate is applied..
- Units reworked
- — number value.
- Rework labour hours per unit
- — number value.
- Labour cost per hour
- — number value.
- Replacement material per unit (optional)
- — Optional component. Leave at 0 to exclude it from the result..
- Overhead applied per reworked unit (optional)
- — Optional component. Leave at 0 to exclude it from the result..
- Fixed rework cost (optional)
- — Optional component. Leave at 0 to exclude it from the result. Inspection, handling or anything the rework run costs once..
How to use it
- Enter your own figures — the calculator never fills in a rate, price or benchmark for you.
- Press Calculate to see the result.
- Read the formula, variables, assumptions and source below the result before you rely on it.
Formula
Rework cost = Units reworked × ((Rework hours per unit × Labour rate) + Material per unit + Overhead per unit) + Fixed rework cost.
Inputs used: Currency, Units reworked, Rework labour hours per unit, Labour cost per hour, Replacement material per unit (optional), Overhead applied per reworked unit (optional), Fixed rework cost (optional).
Edge handling: Units reworked is required.; Units reworked cannot be negative.; Units reworked must be no more than 1000000000000.; Rework labour hours per unit is required.; Rework labour hours per unit cannot be negative..
Worked example
60 units put back through the line
- Start with Currency: USD, Units reworked: 60, Rework labour hours per unit: 0.4, Labour cost per hour: 28.50, Replacement material per unit (optional): 0, Overhead applied per reworked unit (optional): 0.
- Apply the method: Rework cost = Units reworked × ((Rework hours per unit × Labour rate) + Material per unit + Overhead per unit) + Fixed rework cost.
- Rework hours at your own labour cost, with any replacement material and overhead added.
Reading the result
The headline figure is the main answer. Any breakdown underneath shows the parts that make it up, so you can check the working and see what changes when you adjust an input.
Limitations and assumptions
- Inputs outside the supported range are rejected rather than forced into a result.
- The result depends on the values you enter for this rework cost calculator; it does not supply missing rates, rules, prices, dates, or assumptions for you.
Reference: American Society for Quality — Cost of quality — prevention, appraisal and failure costs
Last reviewed:
Common questions
Where does this formula come from?
ASQ cost of quality — scrap, rework and yield loss are internal failure costs: the cost already invested in output that cannot be sold as it is, less anything recovered. See the source link on this page.
What kind of calculation is this?
The extra labour, material and overhead spent making defective units good, plus anything the rework run costs once. Check the formula, example, and limitations on this page before using the result for a real professional & industry decision.
What are its limits?
Arithmetic over the figures entered — it cannot tell whether the costs, standards or allowances behind them are right. A target cost, an industry benchmark and the organisation's own standard are different things; only the figures entered are used. Direct rework cost only; delay, expediting and lost goodwill are not included unless entered as a fixed cost.
How do I use the Rework Cost Calculator?
Enter the required values for Currency, Units reworked, Rework labour hours per unit, Labour cost per hour, Replacement material per unit (optional), and the other fields shown. The calculator applies the formula on this page and shows the main result with any supporting breakdown so you can check the arithmetic.
What formula does the Rework Cost Calculator use?
Rework cost = Units reworked × ((Rework hours per unit × Labour rate) + Material per unit + Overhead per unit) + Fixed rework cost The visible formula section above lists the calculation path and the edge cases the page handles, so the result can be checked without relying on the form alone. Check the formula, example, and limitations on this page before using the result for a real professional & industry decision.
Can the Rework Cost Calculator be used for exact decisions?
Use it as a calculation aid, not as a substitute for checking the underlying rule, contract, policy, or professional advice that applies to your situation. When a result depends on local rules, personal details, prices, or dates, enter those values yourself and confirm them before acting.
Formula, source and verification
The extra labour, material and overhead spent making defective units good, plus anything the rework run costs once.
The question it answers: What is the scrap, the rework and the yield loss on this line actually costing us?
The formula
Rework cost = Units reworked × ((Rework hours per unit × Labour rate) + Material per unit + Overhead per unit) + Fixed rework cost
- n — Units reworked
- (count). Units put back through.
- h — Rework hours per unit
- (hour). Extra labour each unit needs.
- r — Labour rate
- (currency). The user's own cost per hour.
- m — Material per unit
- (currency). Optional. Replacement material.
- o — Overhead per unit
- (currency). Optional. Overhead applied to rework.
- F — Fixed rework cost
- (currency). Optional. Cost the rework run carries once.
Units: Currency; hours; counts.
What kind of calculation this is
Deterministic formula. The same inputs always give the same answer. The maths is fixed and does not depend on judgement.
Method
Per-unit rework cost built from hours, material and overhead, multiplied by the units reworked, with any one-off cost added.
Assumptions built into the result
- Industry: Every cost, rate and standard is the figure the user entered, in the currency they chose; no exchange rate is applied.
- Mathematical: Costs and output cover the same period or the same job.
Figures this calculator will never guess for you
- No industry average, benchmark or target cost is supplied.
- No standard rate, wage or material price is assumed on the user's behalf.
- Optional components are excluded from the result when left at zero.
- No acceptable rework level is implied.
Limitations
- Arithmetic over the figures entered — it cannot tell whether the costs, standards or allowances behind them are right.
- A target cost, an industry benchmark and the organisation's own standard are different things; only the figures entered are used.
- Direct rework cost only; delay, expediting and lost goodwill are not included unless entered as a fixed cost.
Source and version
- Standard or reference
- Cost of quality — internal failure cost — ASQ (ASQ cost of quality — scrap, rework and yield loss are internal failure costs: the cost already invested in output that cannot be sold as it is, less anything recovered.)
- Published source
- American Society for Quality — Quality resources
- Formula version
- Version 1
- Verification
- Reviewed against the cited source on
- How much weight the source carries
- Standards or government
- Applies to
- Currency
- Amounts stay in the currency you choose; no exchange rate is applied.
Cite this page
Free Calculator. (2026, September 16). Rework Cost Calculator. https://freecalculator.tech/tools/rework-cost-calculator
"Rework Cost Calculator." Free Calculator, 16 Sept. 2026, https://freecalculator.tech/tools/rework-cost-calculator.
Rework Cost Calculator — Free Calculator, https://freecalculator.tech/tools/rework-cost-calculator
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