Metric to Imperial Screw Converter
Match common metric screw sizes to nearest imperial/UNC equivalents in one tap.
Open toolUniversal Screw & Bolt Converter
Convert metric and imperial fasteners, thread pitch, and tap drill sizes instantly.
Core Tools
Thread Pitch to TPI Converter
Convert between mm pitch and threads per inch with instant calculation while typing.
Open toolTap Drill Calculator
Calculate recommended tap drill diameter from metric thread size and pitch.
Open toolThread Identifier Tool
Identify likely metric or imperial thread standards from measured diameter and pitch.
Open toolBolt Torque Calculator
Calculate recommended tightening torque for metric and imperial bolts.
Open toolFastener Weight Calculator
Estimate per-bolt and total weight by size, length, quantity, and material.
Open toolDrill Bit Size Converter
Convert number, letter, inch, and millimeter drill sizes instantly.
Open toolGuides & References
Practical fastener and thread guides for mechanics, engineers, and DIY builders.