Latest posts
Ring Sizes and Bead Sizes in MM and Inches
US ring sizes 4 to 13 as inside diameter and circumference in mm and inches, bead sizes from 2 to 20 mm in inches, and how to measure your ring size at home.
TV and Monitor Screen Sizes in CM: Width and Height Chart
Common TV and monitor sizes from 24 to 85 inches converted to cm, with the real width and height of each screen and a simple formula to work it out yourself.
Pipe Sizes in Inches and MM: Nominal vs Actual Size Explained
Why a 1/2-inch pipe is not 1/2 inch: NPS and DN pipe sizes with real outside diameters in inches and mm, copper tube sizes, and how to identify an unknown pipe.
Metric vs Imperial: How the Two Systems Work (and How to Convert)
How the metric and imperial (US customary) length systems work, why 1 inch is exactly 25.4 mm, and practical tips for working with both.
Rainfall MM to Inches: Conversion Chart and What It Means
Convert rainfall between mm and inches with a quick chart, learn what 1 mm of rain really means, and how heavy light, moderate and heavy rain are.
3D Printer Filament and Nozzle Sizes in Inches
1.75 mm and 2.85 mm filament, 0.2–1.0 mm nozzles and common layer heights converted to inches, plus tips for printing parts that fit inch hardware.
Paper Sizes in Inches and MM: A4, A3, Letter and More
A0 to A6 paper sizes in inches, US Letter, Legal and Tabloid in millimeters, the A4 vs Letter difference and why it matters when you print.
Wrench and Socket Size Chart: SAE vs Metric
SAE wrench sizes in mm and metric sizes in inches, the exact difference between them, and which pairs you can safely swap.
Metric Bolt Sizes in Inches (M3 to M12): Thread, Wrench and Drill Sizes
M3 to M12 bolts converted to inches, with thread pitch in TPI, wrench and hex key sizes, tap drill and clearance holes, and the nearest inch bolt.
Drill Bit Size Chart: Fractional Inch to Metric (and Back)
Exact mm values for fractional drill bits from 1/16″ to 1/2″, inch values for metric bits from 1 to 13 mm, and which sizes you can safely swap.