How to convert spans (cloth) to microinches
1 span (cloth) is equal to 9,000,000 microinches, and 1 microinch is equal to 1.111111111 × 10⁻⁷ spans (cloth). To convert, multiply by the conversion factor:
microinches = spans (cloth) × 9,000,000
microinches = spans (cloth) ÷ 1.111111111 × 10⁻⁷Example: convert 1 span to µin: 1 × 9,000,000 = 9,000,000 µin.
Span (cloth) to Microinch conversion table
| Span (cloth) (span) | Microinch (µin) |
|---|---|
| 0.01 span | 90,000 µin |
| 0.1 span | 900,000 µin |
| 1 span | 9,000,000 µin |
| 2 span | 18,000,000 µin |
| 3 span | 27,000,000 µin |
| 5 span | 45,000,000 µin |
| 10 span | 90,000,000 µin |
| 20 span | 180,000,000 µin |
| 50 span | 450,000,000 µin |
| 100 span | 900,000,000 µin |
| 250 span | 2,250,000,000 µin |
| 500 span | 4,500,000,000 µin |
| 1,000 span | 9,000,000,000 µin |
About the span (cloth)
The cloth span is 9 inches (22.86 cm), originally the distance between the tips of the thumb and little finger of a spread hand.
Symbol: span · 1 span = 0.2286 m · Category: Historical & cloth
About the microinch
A microinch is one millionth of an inch (25.4 nm). It's used to specify surface roughness in machining.
Symbol: µin · 1 µin = 2.54 × 10⁻⁸ m · Category: Imperial & US customary