# SAE to Metric Calculator And Metric to Standard

## SAE to Metric Calculator

## Metric to SAE Calculator

# Converting SAE to Metric: A Comprehensive Guide

Understanding the distinction between SAE (Standard) and metric measurements is essential, as they are widely used in sockets, wrenches, and fasteners. Before delving into the process of converting SAE to metric, let's grasp the underlying concepts.

SAE, an acronym for the Society of Automotive Engineers, relies on standard imperial and U.S. customary measurements, predominantly utilizing inch fractions. This system is prevalent in the United States. In contrast, metric sizes are globally recognized and involve the measurement of sockets and screws in millimeters.

To convert SAE measurements to metric, you have two options: utilize a conversion chart or follow a simple step-by-step manual conversion process.

**Step One: Fraction to Decimal Conversion**

Begin by converting the inch fraction into a decimal format. Treat the fraction as a division problem and solve it accordingly.

For example:

1/4″ = 1 ÷ 4 = 0.25″

**Step Two: Conversion to Millimeters**

Next, multiply the inch decimal by 25.4 to obtain the equivalent measurement in millimeters. This crucial step enables the accurate conversion from SAE to metric.

0.25″ × 25.4 = 6.35 mm

**SAE to Metric Conversion Chart**

Alternatively, you can refer to the SAE to metric conversion chart below. This comprehensive chart presents common socket, wrench, and screw sizes, providing their SAE, metric, and inch decimal equivalents.

Standard (SAE) | Metric (mm) | Inches (decimal) |

1/32″ | 0.7938 mm | 0.0313″ |

1 mm | 0.0394″ | |

1/16″ | 1.5875 mm | 0.0625″ |

5/64″ | 1.98438 mm | 0.0781″ |

2 mm | 0.0787″ | |

3/32″ | 2.3813 mm | 0.0938″ |

7/64″ | 2.7781 mm | 0.1094″ |

3 mm | 0.1181″ | |

1/8″ | 3.175 mm | 0.125″ |

5/32″ | 3.9688 mm | 0.156″ |

4 mm | 0.157″ | |

4.5 mm | 0.177″ | |

3/16″ | 4.7625 mm | 0.188″ |

5 mm | 0.197″ | |

5.5 mm | 0.216″ | |

7/32″ | 5.5563 mm | 0.219″ |

6 mm | 0.236″ | |

1/4″ | 6.35 mm | 0.25″ |

6.5 mm | 0.256″ | |

7 mm | 0.276″ | |

9/32″ | 7.1438 mm | 0.281″ |

5/16″ | 7.9375 mm | 0.313″ |

8 mm | 0.315″ | |

11/32″ | 8.7313 mm | 0.344″ |

9 mm | 0.354″ | |

3/8″ | 9.525 mm | 0.375″ |

10 mm | 0.394″ | |

13/32″ | 10.3188 mm | 0.406″ |

11 mm | 0.433″ | |

7/16″ | 11.1125 mm | 0.438″ |

15/32″ | 11.9063 mm | 0.469″ |

12 mm | 0.472″ | |

1/2″ | 12.7 mm | 0.5″ |

13 mm | 0.512″ | |

17/32″ | 13.4938 mm | 0.531″ |

14 mm | 0.551″ | |

9/16″ | 14.2875 mm | 0.563″ |

15 mm | 0.591″ | |

19/32″ | 15.0813 mm | 0.594″ |

5/8″ | 15.875 mm | 0.625″ |

16 mm | 0.63″ | |

21/32″ | 16.6688 mm | 0.656″ |

17 mm | 0.669″ | |

11/16″ | 17.4625 mm | 0.688″ |

18 mm | 0.709″ | |

23/32″ | 18.2563 mm | 0.719″ |

19 mm | 0.748″ | |

3/4″ | 19.05 mm | 0.75″ |

25/32″ | 19.8438 mm | 0.781″ |

20 mm | 0.787″ | |

13/16″ | 20.6375 mm | 0.813″ |

21 mm | 0.827″ | |

27/32″ | 21.4313 mm | 0.844″ |

22 mm | 0.866″ | |

7/8″ | 22.225 mm | 0.875″ |

23 mm | 0.906″ | |

29/32″ | 23.0188 mm | 0.906″ |

15/16″ | 23.8125 mm | 0.938″ |

24 mm | 0.945″ | |

1″ | 25.4 mm | 1″ |

By utilizing either the manual conversion process or the conversion chart, you can seamlessly convert SAE measurements to metric, enabling greater flexibility and compatibility with a wide range of tools and fasteners worldwide.