Coverage: #0-80 to 1"-8
- Thread pitch
- Wrench sizes
- Strength grades
- Compatibility ratings
Conversion Charts & Reference TablesImperial to Metric Reference for Manufacturing
Comprehensive imperial to metric conversion charts for manufacturing professionals. All charts are free to use, printable, and downloadable as CSV/PDF for shop floor reference.
Comprehensive Data
Complete coverage of common fastener, tolerance, and hardware standards.
Print-Optimized
Clean layouts designed for shop floor printouts and quick reference.
Downloadable
Export charts as CSV or PDF for spreadsheets and documentation.
Available Charts
Fastener Sizes
Imperial to Metric Thread Conversion (UNC/UNF)
Drill Bit Sizes
Fractional, Number & Letter Series to Metric
Coverage: 1/64" to 1", #80-#1, A-Z
- Decimal equivalents
- Metric sizes
- Tap drill recommendations
Tolerance Grades
ANSI B4.1 to ISO 286 IT Grades
Coverage: IT1 to IT18
- Tolerance values
- Fit types
- Size ranges
Coming Soon
More charts are being developed. Check back soon or suggest a chart.
Material Grades
AISI/ASTM to EN/JIS/GB Steel Grades
Coverage: Common steel & aluminum alloys
- Equivalent grades
- Mechanical properties
- Applications
Bearing Sizes
Inch Series to Metric Bearing Conversion
Coverage: R-series to 6000-series
- Inner/outer diameter
- Width
- Load ratings
Pipe Thread Sizes
NPT/BSPT to Metric Pipe Threads
Coverage: 1/8" NPT to 4" NPT
- Thread specifications
- Seal types
- Wrench flats
Sheet Metal Gauge
Imperial Gauge to Metric Thickness
Coverage: 10-36 gauge
- Steel thickness
- Aluminum thickness
- Weight per sq ft
Wire Gauge
AWG/SWG to Metric Diameter
Coverage: AWG 0000-40
- Diameter
- Cross-section area
- Current capacity
Surface Roughness
Ra (ΞΌin) to Ra (ΞΌm) Conversion
Coverage: 1-250 ΞΌin
- Roughness values
- Machining processes
- Visual comparisons
Wrench Sizes
Imperial to Metric Wrench Conversion
Coverage: 1/4" to 2"
- Exact conversions
- Close alternatives
- Socket depths
Want All Charts in One Package?
Download the complete chart collection as a single PDF for offline reference. Perfect for shop floor use.
Interactive Tools
Beyond static charts β use our interactive calculators for more complex conversions.