Paper Machine Capacity Calculator

Derive rated tons per day (TPD) — and see how operating efficiency (runnability) moves the number on the same machine.

TPD = W × V × 1440 × G × η ÷ 1,000,000

Why three numbers? The machine does not change between these — only η, the operating efficiency, does. That swing is the single figure a buyer must interrogate before signing. Real machine-efficiency observations run 67–93% (good ≈ 88%). Ask any supplier for the efficiency assumption behind their quoted TPD.

Illustrative calculator. Actual runnability depends on furnish, controls, web breaks and maintenance. Henan Zejiang Paper Machinery — turnkey paper mill projects, installation & commissioning, rebuild, and waste paper recycling lines.

Trim width, W reel-trimmed, metres (1.8–5.6)

Design speed, V metres/min (120–900)

Basis weight, G grammage, g/m² (14–450)