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Terms of use

Last updated: 12 November 2026

Ruler Now is provided free of charge. By using the site you agree to the terms below.

Measurements are estimates

The size of anything drawn on a screen depends on that screen. Ruler Now estimates the scale of your display automatically and lets you calibrate it against a card, but it cannot guarantee the accuracy of any measurement. Readings also depend on browser zoom, display scaling and how carefully an object is lined up.

Do not rely on this site for engineering, construction, medical, legal or other safety-critical measurements. Use a suitable calibrated physical instrument for those.

Provided “as is”

The site is provided as is, without warranties of any kind. To the fullest extent permitted by law, we are not liable for any loss or damage arising from the use of the site or from reliance on its results.

Acceptable use

You may use the site for personal or commercial measuring tasks. Please do not try to disrupt the site or use it in a way that breaks the law.

Changes

The site and these terms may change over time. The date at the top of this page shows when the terms were last updated.