They are commonly used to drill lathe centres and spotting drills, i.e.marking holes to guide twist drilling. What Is the Formula to Convert MM to Inches To convert inches to millimeters multiply your number by 25.4. 5mm to inches 0.19685 How to convert inches to millimetres. 6mm to inches 0.23622 Learn and grow using expert level know how. The chart below shows some example conversions, rounded to a maximum of 4 decimal places. They are also seen in the UK to a lesser degree, having been largely replaced by metric sizes. No more scratching your head wondering which gauge relates to which size or how to convert inches to mm or vice versa. © 2020 All rights Reserved. To measure the diameter of a drill bit, it’s best to measure the cutting edge rather than the shank (the shank is the part that is held by the drill chuck). In 1958 the United States and countries of the Commonwealth of Nations defined the length of the international inch (in) is to be exactly 25.4 millimeters (mm) . Jobber-length drill bits are the most common, with a length somewhere between 9 to 14 times the diameter. 100 cm to inches 3.93701 Using Units and Dimensions in SolidWorks. Each unit being one-sixteenth of an inch (1/16th inch). How to Convert Inches to MM Another example of a metric set of drill sizes is the Renard series, which uses a simple factor to determine the diameter: Number and letter gauges do not follow a formula or standard increments. The drill size chart below contains imperial and metric drill bit diameter measurements for all number and letter gauges. Click here to read our Tricks of the Trade from the past year.» But, there’s more to this article than just charts. Every drill size chart you’ll ever need is in this article! AutoCAD vs. SolidWorks. In 1958 the United States and countries of the Commonwealth of Nations defined the length of the international inch (in) is to be exactly 25.4 millimeters (mm). No more scratching your head wondering which gauge relates to which size or how to convert inches to mm or vice versa. 1 metre is equal to 1000 mm, or 39.370078740157 inches. To get an accurate measurement, use Vernier callipers, but be aware that depending on the quality of the drill bit, there could be a tolerance error of between 5 and 15 thousandths of a unit. To convert Inches to other units just select an other length unit from the list or your can search from the search form above. 2 inches to mm = 50.8 mm Twelve inches equals one foot. As well as detailed sizing charts, this article contains a brief outline of drill bit sizing systems, how gauge relates to diameter, and some of the different lengths used in various applications. This Online Conversion Calculator converts in both directions. 1 inches to mm = 25.4 mm. . 8mm to inches 0.314961 Or which metric sizes correspond with your standard inch tools? 1 inch = 25.4mm. The fastest and easiest way to convert mm (millimeters) to inches is use this simple formula: inches = millimeters ÷ 25.4 Since there are 25.4 millimeters in one inch [1] , the length in inches is equal to millimeters divided by 25.4. Download PDF  |  Also available for sale as a Magnet or Waterproof Card, Combination Wrench Set, 38-Piece (1/4 - 1-1/4 in., 6-24 mm) - Rack, Combination Wrench Set, 30-Piece (1/4-1 in., 8-22 mm) - Keeper, Combination Wrench Set, 30-Piece (1/4-1 in., 8-22 mm) - Pouch, 1/4 Inch Drive 6-Point Socket & Ratchet Set, 55-Piece (5/32-9/16 in., 4-14 mm), 3/8 Inch Drive 6-Point Socket & Ratchet Set, 74-Piece (1/4-1 in., 6-24 mm), 1/2 Inch Drive 6-Point Socket & Ratchet Set, 58-Piece (3/8-1 in., 10-24 mm), BLOG: Inch to Millimeter Conversion Charts. mm to Inches Fraction. 1 metre is equal to 39.370078740157 inches, or 1000 mm. View all posts by . Type in your own numbers in the form to convert the units! How to convert millimeters to feet+inches. Pipe Fittings How to Measure Pipe Size ... Guide to Fitting Types Fittings Flow Chart Plastic Pipe Flow Charts Metric Aerators.