How do you calculate yield in manufacturing?

Divide good units out by the input units started, then multiply by 100. With 1,908 good units from 2,000 started, yield is 1,908 / 2,000 = 95.4%.

What is a good manufacturing yield?

It depends on the process. Mature high-volume assembly often runs 98-99%+, while difficult castings or new product launches may sit at 85-92%. The 95.4% in the example is solid for a general line but leaves clear room to recover the 4.6% loss.

What is the difference between scrap rate and rework rate?

Scrap rate is the share of units thrown away (2.9% here, 58 units), while rework rate is the share that needed repair to become good (1.7%, 34 units). Scrap is pure material loss; rework is recovered but adds labor and cycle time.

Does yield include reworked units?

Yes — once reworked units pass and ship, they count as good units in the yield numerator. That is why yield (95.4%) can look healthy even when rework rate (1.7%) is quietly inflating your cost per unit.

What is the difference between yield and first pass yield?

This yield counts every good unit including reworks, so it tolerates hidden rework. First pass yield only credits units that passed cleanly the first time, exposing the true quality of the process.

How is loss rate related to yield?

Loss rate is simply 100% minus yield: (input - good) / input. Here 4.6% of units never became sellable product, which equals the 92 units lost to scrap and net failure.

Quality calculator

Manufacturing Yield Calculator

Yield is the percentage of units you start into a process that come out as sellable good product. Process engineers, quality managers, and plant supervisors track it as the single cleanest gauge of how much of their input survives the line. It matters because every point of lost yield is paid-for material, labor, and machine time that ships nothing — a 1% yield drop on a high-volume line can erase a month's margin. This calculator separates total loss into scrap (gone for good) and rework (recoverable but costly), so you know where to aim improvement effort.

What this calculator does

Calculate production yield from input quantity, good output, scrap, and rework.
Use when output quality needs a simple good-part percentage.
It computes overall process yield as good units divided by units started, plus the loss, scrap, and rework rates that make up the gap.

Formula used

Yield = good units ÷ input units
Loss rate = (input units − good units) ÷ input units

Inputs explained

Input units started: undefined
Good units out: undefined
Scrapped units: undefined
Reworked units: undefined

How to use the result

Use it at the end of a run or shift to grade a single process step, compare lines or operators, or trend yield over time.
Single-step yield can hide compounding losses across a multi-stage process — a 95% yield at each of five steps is not 95% overall. Use rolled throughput yield for the full line.

Current U.S. benchmarks

U.S. manufacturing runs at 75.6% of capacity (Federal Reserve, May 2026). New factory orders are up 2.3% year over year (Census).

Common questions

How do you calculate yield in manufacturing? Divide good units out by the input units started, then multiply by 100. With 1,908 good units from 2,000 started, yield is 1,908 / 2,000 = 95.4%.
What is a good manufacturing yield? It depends on the process. Mature high-volume assembly often runs 98-99%+, while difficult castings or new product launches may sit at 85-92%. The 95.4% in the example is solid for a general line but leaves clear room to recover the 4.6% loss.
What is the difference between scrap rate and rework rate? Scrap rate is the share of units thrown away (2.9% here, 58 units), while rework rate is the share that needed repair to become good (1.7%, 34 units). Scrap is pure material loss; rework is recovered but adds labor and cycle time.
Does yield include reworked units? Yes — once reworked units pass and ship, they count as good units in the yield numerator. That is why yield (95.4%) can look healthy even when rework rate (1.7%) is quietly inflating your cost per unit.
What is the difference between yield and first pass yield? This yield counts every good unit including reworks, so it tolerates hidden rework. First pass yield only credits units that passed cleanly the first time, exposing the true quality of the process.

Last reviewed 2026-05-12.