Exact inch to millimeter reference
Convert 5/8 inch to millimeters for CNC setup sheets, drawings, inspection notes, and supplier communication. The formula uses the exact international inch standard.
Answer first
5/8 inch =
15.8750 mm
The exact conversion uses 1 inch = 25.4 mm. This page displays 15.8750 mm by default. For CNC, inspection, RFQ, or supplier documents, keep the precision required by the drawing, tolerance block, process plan, or inspection equipment.
A 5/8 inch value can be found in material and hardware contexts. Keep drawing notes, finish allowance, and supplier tolerances separate from the unit conversion.
Reference-only caveat: this conversion does not certify tolerance, fit, pressure, load, code compliance, material equivalence, or interchangeability. Confirm the controlling drawing, standard, supplier data, and engineering approval before manufacturing.
5/8 inch equals 15.8750 mm using the exact conversion factor 1 inch = 25.4 mm.
Use mm = inch × 25.4. For this page, 0.625 × 25.4 = 15.8750 mm.
Use the precision required by the drawing, process plan, or inspection method. This page shows 15.88 mm, 15.875 mm, and 15.8750 mm so you can choose the appropriate display precision.
Yes. 5/8 inch is represented here as 0.625 inch before multiplying by 25.4 to get millimeters.
No. This is a reference unit conversion only. Confirm drawing tolerances, standards, material specifications, supplier certificates, and engineering approval before manufacturing or substituting parts.
