September 27, 2026 — CalcOpenly launch
Published 359 calculators across twelve subjects, including 89 dedicated unit conversions and 26 extended guides. Each calculator includes its method, sources and checked worked examples.
- Mortgage payments, refinance comparisons and loan EMI.
- BMI and daily energy estimates with method limitations.
- Concrete quantities and delivery comparisons and elapsed hours across daylight-saving changes.
September 27, 2026 — Search and transparency update
Adopted the CalcOpenly name and www.calcopenly.com address. Added privacy, terms and contact pages, optional analytics controls, more guidance on choosing calculators, and clearer directional conversion examples. The Earth and weather hub now lives at /earth; old /misc links redirect there.
Future method changes and corrections will be added here with their publication date. To report a problem or suggest a calculator, contact the maintainers.