Convert 80 MM to Inches - Precision Calculator
Convert 80 millimeters to inches with precision control
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🪵 Woodworking Application
For woodworking projects, 80 mm converts to approximately 3 2/13" when using 1/16" precision, which is standard for most woodworking measurements.
⚙️ Engineering Application
In engineering contexts, 80 mm equals 3.149606 inches with high precision (6 decimal places) for accurate technical specifications.
🛒 E-commerce Product Description
For online product listings, you can describe this measurement as:
🖨️ 3D Printing Application
For 3D printing, 80 mm is the standard metric measurement. The imperial equivalent is 3.1496 inches.
Where This Size Is Used
- Precision measurement and tolerances
- Electronics components and connectors
- Jewelry and craft parts
- Common hardware and fasteners
- Phones, tablets, and accessories
- Furniture fittings and fixtures
- Construction and building materials
- Furniture dimensions and clearances
- Engineering project measurements
Quick Reference Table
| Millimeters | Inches (Decimal) | Inches (Fraction) |
|---|---|---|
| 40.00 mm | 1.5748 in | 1 4/7" |
| 60.00 mm | 2.3622 in | 2 4/11" |
| 80.00 mm | 3.1496 in | 3 2/13" |
| 100.00 mm | 3.9370 in | 3 15/16" |
| 120.00 mm | 4.7244 in | 4 8/11" |
| 160.00 mm | 6.2992 in | 6 3/10" |
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Exact answer, measurement guidance, and nearby sizes
Direct answer and formula
80 mm is 3.1496062992 inches; the unrounded value is exactly 400/127 inch.
80 ÷ 25.4 = 3.1496062992 inches
Basis: 1 inch = 25.4 mm exactly (international inch definition)
Rounding, fractions, and tolerance
The factor 25.4 mm per inch is exact. A 4-decimal display is 3.1496 in. The nearest 1/64-inch mark is 3 5/32 in, differing by 0.16875 mm; the nearest 1/32-inch mark is 3 5/32 in, differing by 0.16875 mm. Use a fraction only when its stated error is smaller than the allowed tolerance; otherwise retain the decimal.
A nearby rounded size is acceptable only when its absolute difference is within the documented dimensional tolerance and all non-dimensional compatibility checks pass.
Cabinet detail transfer
Cabinet detail transfer is a useful context for 80 mm. The calculated counterpart is 3.1496062992 inches. Use a common datum and transfer the decimal value before selecting a convenient rule fraction.
- Use a common datum and transfer the decimal value before selecting a convenient rule fraction.
- Material movement, edge treatment, and saw kerf can exceed a small conversion difference.
Illustrative measurement workflow; it does not claim that this value is a standard product size.
Editorial measurement check
Treat the source dimension as a controlled observation; preserve whether it represents a minimum, maximum, target, or nominal label.
Keep conversion error smaller than measurement uncertainty and process variation so rounding does not dominate the tolerance stack.
If a field measurement controls acceptance, reconcile it with the drawing value instead of overwriting either record.
Nearby comparison and substitution boundary
Rounding to the nearest 1/64 inch selects 3 5/32 inch only for measurements from 79.970312 mm up to (but not including) 80.367188 mm under half-up tie handling. For substitution, require an allowed dimensional deviation of at least 0.16875 mm and check the application-specific fit.
Candidate: 3 5/32 inch; absolute difference: 0.16875 mm.
Questions about this exact conversion
What is 80 mm in the other unit?
80 mm is 3.1496062992 inches; the unrounded value is exactly 400/127 inch.
Is the displayed result for 80 mm exact or rounded?
The factor 25.4 mm per inch is exact. A 4-decimal display is 3.1496 in. The nearest 1/64-inch mark is 3 5/32 in, differing by 0.16875 mm; the nearest 1/32-inch mark is 3 5/32 in, differing by 0.16875 mm. Use a fraction only when its stated error is smaller than the allowed tolerance; otherwise retain the decimal.
What can conversion alone not decide in this example?
Use a common datum and transfer the decimal value before selecting a convenient rule fraction. Material movement, edge treatment, and saw kerf can exceed a small conversion difference.
What is the nearby-size boundary for 80 mm?
Rounding to the nearest 1/64 inch selects 3 5/32 inch only for measurements from 79.970312 mm up to (but not including) 80.367188 mm under half-up tie handling. For substitution, require an allowed dimensional deviation of at least 0.16875 mm and check the application-specific fit.