Other naming systemsABSOLUTE DIAMETER DELTA
fractional-inch drill · nominal diameter
3/4
drill bit size.
A 3/4 bit measures 0.7500 in across (19.050 mm).
The fractional diameter is exact; decimal and metric values are conversions.
Calibrated relative diameter · 1 in reference
3/4 · fractional
0.7500 in
19.050 mm Designation3/4fractional
Inch decimal0.7500nominal
Metric conversion19.050millimetres
Where this size sits from 0 to 1 inch 3/4 · 19.050 mm on a zero to 25.4 millimetre scale. Neighbor marks: 47/64, 49/64.
Measured neighbors
What sits beside 3/4.
“Nearest” means nominal diameter only. It does not make a neighboring size acceptable for a tolerance, tapping, reaming, or fastener application.
Source record
Drill Bit Size Chart.
Fractional sizes are exact rational multiples of one inch.
Open source record