Tolerance Calculator
ISO 2768-1

• Measurement Type: Select the type of measurement you're working with (Length, Edge, or Angle).

• Nominal Size: Enter the nominal size of the dimension you're measuring. 

• Actual Size (optional): If you have an actual measurement, you can enter it here for comparison.

• Tolerance Class: Choose the appropriate tolerance class (Fine, Medium, Coarse, or Very Coarse).

• Calculate: Click the "Calculate" button

• Results:

  • Tolerance Value: The calculated tolerance value based on the input parameters.

  • Allowable Dimension Range: The range within which the dimension is considered acceptable, indicated by upper and lower limits.

  • Comparison with Actual Size: If provided, the tool compares the actual size with the tolerance range and indicates whether it falls within tolerance or deviates, along with the deviation amount.

What is ISO 2768?

ISO 2768 is a standard that deals with general tolerances for linear and geometric dimensions in technical drawings.

The standard includes different classes of tolerances, ranging from "fine" to "very coarse," depending on the required precision of manufacturing. For example, there are tolerances for lengths, widths, thicknesses, and other dimensions of components. This norm helps ensure that products have consistent quality standards and are compatible with each other.

ISO 2768 is divided into two parts. The first part, ISO 2768-1, addresses general tolerances for length and angle measurements. Acceptable deviations are specified without the need for specific tolerance for each individual dimension. The second part, ISO 2768-2, defines general geometrical tolerances (GD&T). In 2021, ISO 22081 replaced it as the applicable standard for geometrical tolerances when no individual specification is provided.

With my tool, you can verify both length measurements, fillet radii, chamfer heights, and angle measurements according to ISO 2768-1.