Millimeter to 1/2 inch Converter (and vice versa)

Created by: tinycalcs.com/en
Number of supported units: 2
Last update: 2026

This converter allows you to convert millimeters [mm] to ½ inches [½”] or ½ inches [½”] to millimeters [mm]. Calculations are performed in both directions. The calculation result and the entered value are displayed with up to 20 decimal places for maximum accuracy.

1 millimeter [mm] ≈ 0.0787 ½ inches [½”]1 ½ inch [½”] = 12.7 millimeters [mm]

Convert millimeters to ½ inches

There are two simple ways to convert millimeters [mm] to ½ inches [½”]. In the first calculation method, the value in millimeters [mm] is divided by 12.7. The second method multiplies the value in millimeters [mm] by the rounded conversion factor of 0.0787.

  • ½ Inches [½”] = millimeters [mm] ÷ 12.7
  • ½ Inches [½”] ≈ millimeters [mm] * 0.0787

The calculation method with a rounded conversion value is more suitable for rough conversions from millimeters [mm] to ½ inches [½”], as the calculation result may contain rounding errors. Therefore, the variant with the exact conversion factor is more suitable.


Convert ½ inches to millimeters

Converting ½ inches [½”] to millimeters [mm] is easy and can be done in two ways. The first method involves multiplication, whereby the value in ½ inches [½”] is multiplied by 12.7. The second variant is a division. Here, the value in ½ inches [½”] is divided by the rounded conversion factor of 0.0787.

  • Millimeters [mm] = ½ inches [½”] * 12.7
  • Millimeters [mm] ≈ ½ inches [½”] ÷ 0.0787

The rounded conversion value can cause rounding errors, resulting in inaccurate calculation results. To ensure that the conversion from ½ inches [½”] to millimeters [mm] produces the most accurate calculation result possible, the conversion should be performed using the exact conversion factor.

Converter

Decimal places

How it's calculated

Factor: 
12.7
Millimeters=½ Inches*12.7
½ Inches=
Millimeters12.7

To all available units

Millimeters

Hectometers

Millimeters

Inches

Millimeters

Kilometers

Millimeters

Kiloparsecs

Millimeters

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