Metric To Imperial Tool Conversion

If you’re like me and always confused by metric-to-imperial conversion when dealing with spanners and sockets then our metric to imperial tool conversion calculator will be right up your street.

Use our metric to imperial tool converter below to quickly get the correct metric to imperial tool conversion below or our handy conversion chart is available below.

For Imperial to Metric Click Here >

Metric to Imperial Conversion Calculator.

Select Your Metric Size (MM): 4 mm 5 mm 6 mm 7 mm 8 mm 9 mm 10 mm 11 mm 12 mm 13 mm 14 mm 15 mm 16 mm 17 mm 18 mm 19 mm 20 mm 21 mm 22 mm 23 mm 24 mm 25 mm 26 mm 27 mm 28 mm 29 mm 30 mm 31 mm 32 mm 33 mm 34 mm 35 mm 36 mm 37 mm 38 mm 39 mm 40 mm 41 mm 42 mm 43 mm 44 mm 45 mm 46 mm 47 mm 48 mm 49 mm 50 mm

Metric to Imperial Conversion Charts.

MM Size	Fractional Size	MM Size in Inch

The Caveats to Metric to Imperial Tool Conversion –

When converting between metric and imperial spanners, sockets, and other tools, several caveats must be considered to ensure accuracy and avoid damage occurring to tools and fasteners.

Size Mismatch and Tolerance Issues:

One of the primary caveats in converting metric to imperial spanners and sockets is the size mismatch. Although some metric and imperial sizes are close, they are not identical. For example, a 13mm socket is close to a 1/2-inch socket, but not an exact match as a 1/2-inch socket measures 12.7mm. This slight difference can lead to a loose or too-tight fit, which might cause rounding off or stripping of bolt heads and nuts. The tolerances in tool manufacturing mean that even small discrepancies can result in inefficient torque application, potentially causing damage to both the tool and the fastener.