calc2ool.com

About calc2ool

calc2ool provides practical calculators for engineering and business: mechanical design, hydraulics, material estimates, electrical power, CNC machining, pricing and break-even analysis. Each calculator includes its formula, assumptions and an example in English and Korean. Engineering tools support Metric and Imperial units; business tools use a display-only currency selection.

Formulas and assumptions

Engineering inputs are converted to SI units before calculation, then converted to the selected display units. Business calculations use the entered amounts directly; currency selection does not convert values. Calculations retain precision internally; displayed results are rounded. Review each tool's formula and assumptions when applying its result.

NIST — SI conversion factors ↗

Privacy and your calculations

Calculations run in your browser. No account is required. The Google AdSense script is loaded for site ownership verification and review. No ad units or separate analytics scripts are configured. Shared links include your calculation inputs in the URL; anyone with the link can read those values. The hosting provider may process basic access logs when serving the site.