Usage and Limitations.

Understand the reading before you rely on it.

Everyday reference

The tools provide geometric calculations and screen-based measurements for everyday reference. They are not a substitute for calibrated instruments when fitting components, carrying out precision work or making decisions that depend on exact physical dimensions.

Display and rounding limits

A screen has a finite physical size and resolution. Alignments, zoom changes and calibration errors can affect direct measurements. Length and area readouts are normally rounded to two decimal places, and angles to one decimal place. A displayed decimal does not guarantee equivalent measurement precision.

Using this website

You may use the tools without creating an account. Use them without interfering with the website or other visitors. Browser storage settings may prevent calibration from being saved. Tool availability and features may change.