fractional-inch drill · nominal diameter
3/16
drill bit size.
A 3/16 bit measures 0.1875 in across (4.762 mm).
The fractional diameter is exact; decimal and metric values are conversions.
Calibrated relative diameter · 1 in reference
3/16 · fractional
0.1875 in
4.762 mm Designation3/16fractional
Inch decimal0.1875nominal
Metric conversion4.762millimetres
Where this size sits from 0 to 1 inch 3/16 · 4.762 mm on a zero to 25.4 millimetre scale. Neighbor marks: 4.8 mm, #12.
Measured neighbors
What sits beside 3/16.
“Nearest” means nominal diameter only. It does not make a neighboring size acceptable for a tolerance, tapping, reaming, or fastener application.
This row is at the exposed edge of its series.
Source record
Drill Bit Size Chart.
Fractional sizes are exact rational multiples of one inch.
Open source record