Market Data

U.S. Factories Are Running at 75.57%, Which Means Roughly 24% of Capacity Sits Idle

Manufacturing capacity utilization is running well below the total-industry average, and the gap is a direct measure of unused factory floor.

U.S. manufacturing is operating at 75.57% of capacity, meaning roughly 24% of the sector's productive capability is idle, a wider cushion of slack than total industry, which runs closer to 76.17%. The figure comes from the Federal Reserve's G.17 release as of May 2026, and it is up about 0.2% from a year ago. For anyone trying to gauge how much unused factory floor exists in American manufacturing, this is the single most direct number the government publishes.

What the idle share actually represents

Capacity utilization divides the Fed's index of manufacturing output by its estimate of sustainable maximum capacity, what plants could produce with existing equipment on realistic work schedules, not a theoretical around-the-clock sprint. Subtract the reading from 100 and you get the idle share: at 75.57%, roughly 24.4% of the sector's installed capability is not producing anything. That slack is not evenly spread. Some shops are turning work away while others run half-empty, and the mix shifts by industry, but the aggregate tells you how much headroom the sector as a whole has before demand growth starts colliding with physical limits. The Fed rebuilds its capacity estimates from plant-level surveys and industry physical-capacity data on a deliberate annual cycle, so the denominator moves slowly, which means month-to-month changes in this rate are almost entirely an output story, not a capacity one.

Manufacturing capacity utilization, May 2026: 75.57%. Federal Reserve G.17 via FRED. Ranged from 74.63% in Dec 2025 to 75.87% in Jul 2025 across the archived window.

Why manufacturing runs cooler than total industry

The total-industry rate, which adds mining and utilities to factories, currently reads 76.17%, 0.6 points above the manufacturing rate. Utilities run near-continuously and mining responds quickly to commodity prices, so the broader measure tends to sit tighter. The manufacturing-only figure is the one that maps to factory floors: it is the rate that governs whether your suppliers have open press time, whether machine builders quote six weeks or six months, and whether a surge order gets absorbed or triggers overtime. The manufacturing rate is currently climbing, and it sits about 2.4 points below the sector's long-run average of roughly 78% since 1972. For suppliers to the sector, percentile position matters as much as level: the figure stands at the 76th percentile of the archived window, inside a band only 1.2 points wide, so small moves carry more signal than the decimals suggest.

Subtract the utilization rate from 100 and you get the most honest measure of American factory slack the government publishes.

What the sector rate looks like on one shop floor

Scale the aggregate down to a single plant and the idle share stops being abstract. A shop with 20 machines available 6,000 hours a year each has 120,000 machine-hours of capacity. Running at the sector's 75.57% rate, about 29,316 of those hours produce nothing, the equivalent of 4.9 machines standing completely still all year. Every one of those hours still carries depreciation, insurance, and floor-space cost. That is why the utilization rate matters beyond macroeconomics: it is the sector-wide version of the absorption problem every plant controller fights, and it tells you whether your competitors are carrying the same dead weight you are. When the sector's idle share is wide, quoting gets predatory, someone is always willing to price marginal work at contribution just to absorb overhead, and when it narrows, that pressure lifts across every RFQ at roughly the same time.

Put your demonstrated output and available machine-hours into the capacity gap calculator to see how your plant's idle share compares with the sector's. Measure your own capacity gap

Published 2026-07-13.