16 mm Drill Bit Size
A 16 mm drill bit is 0.6299 inches. The nearest common fractional drill bit is 5/8 inch, which measures 0.6250 inches or 15.88 mm.
Quick Answer
Decimal
0.6299 in
Metric
16.00 mm
Closest
5/8 inch
16 mm Drill Bit Equivalent Chart
| Size | Decimal Inches | Metric | Note |
|---|---|---|---|
| 16 mm | 0.6299 in | 16.00 mm | Exact size |
| 5/8 inch | 0.6250 in | 15.88 mm | Closest common fractional size |
| 41/64 inch | 0.6406 in | 16.27 mm | Oversize clearance alternative |
| 19/32 inch | 0.5938 in | 15.08 mm | Undersized alternative |
Common Uses
Large through-holes, heavy anchors, plumbing, and fabrication.
Exact vs Nearest Size
Choose the exact bit for threads, tight hardware fits, dowels, and precision layouts. Use the nearest common equivalent only for rough pilot holes, clearance holes, or material removal where a slight difference is acceptable.
16 mm Drill Bit FAQ
What are the inch and metric dimensions for 16 mm?
16 mm drill bit measures 0.6299 in and 16.00 mm.
What is the closest common equivalent to 16 mm?
5/8 inch is the closest common equivalent listed here. It measures 0.6250 in or 15.88 mm.
Can I substitute another bit for 16 mm?
Use the exact bit size for tap drilling, precision holes, dowels, and manufacturer-specified hardware. A nearby fractional, metric, numbered, or letter drill bit is usually fine only for clearance holes or rough pilot holes.