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 1/2 inches [½″] or 1/2 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.
Convert millimeters to 1/2 inches
There are two simple ways to convert millimeters [mm] to 1/2 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.
- 1/2 Inches [½″] = millimeters [mm] ÷ 12.7
- 1/2 Inches [½″] ≈ millimeters [mm] * 0.0787
The calculation method with a rounded conversion value is more suitable for rough conversions from millimeters [mm] to 1/2 inches [½″], as the calculation result may contain rounding errors. Therefore, the variant with the exact conversion factor is more suitable.
Convert 1/2 inches to millimeters
Converting 1/2 inches [½″] to millimeters [mm] is easy and can be done in two ways. The first method involves multiplication, whereby the value in 1/2 inches [½″] is multiplied by 12.7. The second variant is a division. Here, the value in 1/2 inches [½″] is divided by the rounded conversion factor of 0.0787.
- Millimeters [mm] = 1/2 inches [½″] * 12.7
- Millimeters [mm] ≈ 1/2 inches [½″] ÷ 0.0787
The rounded conversion value can cause rounding errors, resulting in inaccurate calculation results. To ensure that the conversion from 1/2 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
To all available units
Millimeters
Hectometers
Millimeters
Inches
Millimeters
Kilometers
Millimeters
Kiloparsecs
Millimeters
Light days
Popular with other users …
Power
Watts, kilowatts, and horsepower are everyday units of power. However, it is also possible to use kilojoules per second, HP, or joules per second. The power converter is ideal for converting between different units of power.
Power converter
Pressure
Hectopascals, millibars, and bars are just a few examples of the many units of pressure. The pressure converter makes conversion a breeze and ensures that the results are accurate and precise.
Pressure converter
Resistance
Electrical resistance is often expressed in ohms or kiloohms. However, it is also possible to use statohms or deciohms. The resistance converter is ideal for converting between different units of resistance.
Resistance converter
Speed
While mph is used in the USA, km/h is the standard in Europe, and seafaring and aviation rely on knots. This speed converter is the perfect tool for accurately converting between various units of speed.
Speed converter