# Automotive Line Rate and Capacity Calculator

> Source: https://netray.co/tools/automotive-line-rate-capacity-calculator
> Publisher: Netray (netray.co), AI and integration engineering for ERP and manufacturing systems.
> Section: Free Tools

## Short answer

Convert cycle time, shifts and OEE into annual capacity, then compare to customer demand to get utilization, takt time and the OEE you need.

## Category

mes-shop-floor

## Industry

Automotive

## Audience

- Industrial engineer
- Plant manager
- Program manager

## Tool

**Kind:** calculator

**Inputs:**

#### Shifts per day

**Key:** shifts

**Type:** number

**Default:** 2

**Min:** 1

**Max:** 3

**Step:** 1

#### Shift length

**Key:** shift_hours

**Type:** number

**Default:** 8

**Min:** 1

**Max:** 12

**Step:** 0.5

**Unit:** hours

#### Planned breaks per shift

**Key:** breaks

**Type:** number

**Default:** 50

**Min:** 0

**Step:** 5

**Unit:** minutes

**Help:** Breaks, meetings and planned stops that are not production time.

#### Production days per week

**Key:** days

**Type:** number

**Default:** 5

**Min:** 1

**Max:** 7

**Step:** 1

#### Production weeks per year

**Key:** weeks

**Type:** number

**Default:** 48

**Min:** 1

**Max:** 52

**Step:** 1

#### Ideal cycle time per cycle

**Key:** cycle

**Type:** number

**Default:** 42

**Min:** 1

**Step:** 1

**Unit:** seconds

#### Good parts per cycle

**Key:** per_cycle

**Type:** number

**Default:** 1

**Min:** 1

**Step:** 1

**Help:** Cavities or parts made per machine cycle.

#### Expected OEE

**Key:** oee

**Type:** slider

**Default:** 78

**Min:** 30

**Max:** 95

**Step:** 1

**Unit:** %

#### Annual customer demand

**Key:** demand

**Type:** number

**Default:** 380000

**Min:** 0

**Step:** 5000

**Unit:** parts

**Outputs:**

#### Net available minutes per day

**Key:** net_min

**Expr:** shifts * (shift_hours * 60 - breaks)

**Format:** number

#### Available seconds per day

**Key:** avail_sec

**Expr:** net_min * 60

**Format:** number

#### Ideal parts per day

**Key:** ideal_day

**Expr:** avail_sec / cycle * per_cycle

**Format:** integer

#### Expected parts per day at OEE

**Key:** real_day

**Expr:** ideal_day * oee / 100

**Format:** integer

**Primary:** true

#### Annual capacity

**Key:** annual_cap

**Expr:** real_day * days * weeks

**Format:** integer

**Primary:** true

#### Utilization against demand

**Key:** util

**Expr:** demand / annual_cap * 100

**Format:** percent

#### Takt time

**Key:** takt

**Expr:** avail_sec / (demand / (days * weeks))

**Format:** decimal

**Description:** Seconds available per required part.

#### OEE required to meet demand

**Key:** req_oee

**Expr:** demand / (days * weeks) / ideal_day * 100

**Format:** percent

**Chart:**

#### Annual capacity vs OEE

**Type:** line

**X:** oee

**From:** 40

**To:** 95

**Steps:** 23

**Series:**

- annual_cap

**Disclaimer:** Simple deterministic model. It ignores changeover mix, demand peaks, maintenance windows and ramp-up. Many customers require a capacity study with a buffer for peak demand, so add your own safety margin.

## Content

**Intro:** Customer capacity reviews and quote packages both ask the same question: can this line make the required volume? This calculator turns cycle time, shift pattern and OEE into capacity and compares it to demand.

**Sections:**

#### How to use it

**Body:** Enter your shift pattern, planned breaks, production days and weeks, the ideal cycle time and parts per cycle, and the OEE you can realistically expect. Add the customer's annual demand. The outputs show daily and annual capacity, utilization against demand, takt time and the OEE you need to hit the volume. If the required OEE is above what the line has ever achieved, you have a capacity gap to solve with another shift, a faster cycle or another line.

#### The formulas

**Body:** Net available time is shift length minus planned breaks, multiplied by shifts. Ideal output is available seconds divided by cycle time, multiplied by parts per cycle. Real output applies OEE, which combines availability, performance and quality. Takt time is available seconds divided by the average daily demand. Required OEE is daily demand divided by ideal daily output. Demand is spread evenly across the production days, which understates peak weeks.

**Bullets:**

- Utilization above 85 percent leaves little room for variation
- Takt time shorter than the cycle time means you need parallel capacity
- Quality loss is included in OEE, so use good parts

#### Common mistakes

**Body:** Using nameplate cycle time instead of the demonstrated one, forgetting changeover and warm-up inside OEE, and ignoring that customers can request volumes above the nominal planning figure all lead to missed commitments. Use OEE from actual data, ideally from your MES or ERP shop floor reporting, and run the calculation again for the high-volume scenario that the customer lists in the quote. Do not count planned maintenance as production time.

**Cta:** Netray can pull cycle times, OEE and demand from your ERP and MES so capacity checks use live data. The calculator works on its own.

**Faq:**

#### What OEE should I use?

**Answer:** Use demonstrated OEE for the line or a similar one over several months, not the target. For a new line, use a ramp curve and an average that reflects launch losses. A figure from supplier proposals is usually optimistic.

#### How is takt time different from cycle time?

**Answer:** Takt time is how often the customer needs a part, based on demand and available time. Cycle time is how often the process makes one. If takt is shorter than cycle time per part, one line cannot meet demand.

#### Does this handle multiple parts on one line?

**Answer:** Not directly. For multiple parts, run the calculator per part with the share of available time each one uses, or use a worksheet that sums the load by part including changeovers.

#### Why do customers ask for a capacity study?

**Answer:** Automotive customers want evidence you can meet the peak requirement, often a percentage above nominal demand, because a supply interruption can stop their line. APQP asks for capacity analysis as part of feasibility and launch readiness.

## Search terms

line rate calculator, automotive capacity calculator, takt time calculator, production line capacity calculation, required OEE calculator, capacity planning automotive supplier, customer demand vs capacity

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