Printable Letter and Fractional Drill Size Chart
This two-page sheet is for anyone working with standard drill bit sizes, especially when you need a quick reference for letter drills and fractional drills. It lists each size in clear columns for Size, Inches, and mm, with examples like A, B, and C shown in decimal and metric measurements.
Free printable · PDF
- 2 pages
- US Letter — choose “Fit to page” for A4
- PDF, 101 KB
Free for personal, family and classroom use.
Use it at the bench, on a job site, or when sorting drill sets. Read across each row to match the drill letter or fraction to its inch and millimeter size, then compare it to the bit you have or the hole size you need.
Good for
- Match drill bits to decimal and metric sizes
- Check letter and fractional drill sizes quickly
- Sort mixed drill sets by size
Tip: Print on cardstock and keep one copy near your drill index for quick checks.
4 files · PDF, XLSX
Get every sheet: Drill Size Charts
This sheet plus 3 more in one download, with the editable Excel files. Printable drill charts: number and letter drill sizes with decimal and metric equivalents, fractional sizes to 1/2″, a tap drill chart for UNC, UNF and metric threads, and clearance hole sizes — workshop wall format.
$3.00 USD, one-time 4 files · about $0.75 each
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Printable Number Drill Size Chart
Printable Tap Drill Chart
Printable Clearance Hole Chart