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Important Notice

Accuracy & Measurement Disclaimer

Please review this disclaimer regarding the physical precision, display calibration, and intended use of our online tools.

1. General Informational and Educational Purpose

The tools, calculators, printable templates, and educational articles provided on Veewom Online Measurement Tools (https://veewom.com/ruler-online/) are provided for general educational, personal, crafting, and informational purposes only.

2. Display Screen Calibration and Accuracy Limitations

While our tools use mathematically exact conversion formulas ($1\text{ inch} = 25.4\text{ mm}$), the physical accuracy of an on-screen ruler is strictly contingent upon your screen's calibrated Pixels Per Inch (PPI).

  • Operating System & Browser Scaling: Display scaling (e.g., Windows 125% or 150% scaling, macOS Retina scaling, or browser zoom) affects on-screen pixel dimensions.
  • Mandatory Calibration: You must calibrate your screen using our built-in credit card calibrator or a known physical ruler before relying on on-screen measurements.
  • Device Changes: If you move your browser window to a different monitor, alter screen resolution, or adjust zoom settings, you must re-verify calibration.

3. Not for Critical, Legal, or Certified Engineering Applications

Veewom Online Measurement Tools are not certified metrological instruments. They are not calibrated to traceable standards (such as NIST or ISO 17025) and should never be used for:

  • Aeronautical, automotive, or critical structural engineering.
  • Medical device design or medical diagnostic measurements.
  • Legal land boundary surveying, property demarcation, or deed descriptions.
  • Commercial trade transactions requiring legally certified commercial scales or weights and measures.

4. Printable Ruler Scaling Responsibility

Our PDF rulers are generated using vector geometry to achieve 100% scale accuracy. However, desktop printer hardware, print drivers, and third-party PDF viewers often apply automatic margin adjustments (such as "Fit to Page" or "Shrink Oversized Pages") that distort physical output. Users are solely responsible for ensuring that their printer dialog is set to "Actual Size" / 100% Scale and verifying printed rulers against a known physical reference (such as a standard 85.60 mm credit card) prior to use.

5. Limitation of Liability

In no event shall Veewom, its contributors, or PiNEPL Technologies be held liable for any direct, indirect, incidental, consequential, or punitive damages arising out of the use, misuse, or reliance upon any measurement, calculation, or printable resource provided on this website.

6. Questions

For technical inquiries regarding calibration accuracy, please visit our Contact Page.