Capacity Utilization Rate Calculator
Calculate the capacity utilization rate of a plant, kitchen, workshop or service team from actual and maximum output, plus unused capacity, fixed cost per unit and the cost of idle capacity.
How it works
Capacity utilization = actual output ÷ maximum possible output × 100 · Unused capacity = capacity − actual output · Fixed cost per unit = fixed costs ÷ output · Cost of idle capacity = fixed costs × unused capacity ÷ capacity
Capacity utilization shows how much of what you could produce you actually produce. Fixed costs (rent, equipment, salaried staff) are spread over fewer units when utilization is low, so each unit costs more and the unused share of fixed costs is the cost of idle capacity. The US Federal Reserve's industrial utilization rate has averaged around 79–80% over the long run; sustained readings above about 85–90% usually signal the need for more capacity, while low readings point to excess equipment, space or staff. The reading bands here are rules of thumb, not a standard.
Worked example
A workshop that could make 10,000 units made 8,200: utilization is 8,200 ÷ 10,000 = 82.00%, leaving 1,800 units (18.00%) unused. With $50,000 of fixed costs, each unit carries $6.10 of fixed cost instead of $5.00 at full capacity, and idle capacity costs $9,000.00 in the period.
Sources: Federal Reserve — Industrial Production and Capacity Utilization (G.17) · Wikipedia — Capacity utilization
Frequently asked questions
How do you calculate capacity utilization?
Divide actual output by potential (maximum) output and multiply by 100. Producing 8,200 units when you could make 10,000 is 82% utilization.
What is a good capacity utilization rate?
Many manufacturers aim for roughly 80–85%: high enough to spread fixed costs, with headroom for rush orders and maintenance. The US industrial average has hovered near 80% for decades.
How do I measure maximum capacity?
Use realistic (practical) capacity: available hours × output per hour, after planned maintenance and normal breaks. Theoretical capacity that assumes 24/7 running with no stops makes utilization look artificially low.
What is the difference between capacity utilization and OEE?
Utilization compares output with capacity. OEE (overall equipment effectiveness) breaks a machine's performance into availability, speed and quality during planned production time.
Related calculators
Planning estimate only. Real results depend on your actual costs, prices, taxes and market — check the figures with your accountant or adviser before making business decisions.