Last Updated: August 2026

1. Acceptance of Terms

By accessing and using Arch Calculator ("we", "us", or "our"), you agree to comply with and be bound by these Terms of Service. If you do not agree to these terms, please do not use our calculation tools.

2. Nature of the Calculation Tools

Arch Calculator provides mathematical modeling tools intended for drafting assistance, carpentry templating, estimation, and educational purposes. While all formulas are based on established geometric theorems, jobsite variations, material tolerances, and structural load conditions vary.

Engineering & Structural Disclaimer: This calculator does not perform structural load engineering, wind load calculations, or seismic analysis. For load-bearing brick, stone, heavy timber, or concrete arches, always consult a licensed structural engineer or local building official.

3. Intellectual Property

All software code, visual SVG diagrams, written tutorials, and user interface designs are protected by copyright and intellectual property laws. You may use generated calculations and coordinate tables for personal and commercial construction projects freely.

4. Limitation of Liability

In no event shall Arch Calculator Geometry Tools LLC be held liable for any direct, indirect, incidental, or consequential damages resulting from the use or inability to use the calculations, layouts, or data generated on this website.