About CaltoLbs

What This Site Is

CaltoLbs is a standards-referenced unit conversion reference. Every conversion on this site cites its authoritative source — NIST Handbook 44, the BIPM SI Brochure, or ISO 80000 — and every factor is either exact (by legal definition) or explicitly marked as approximate.

We are a technical reference tool, not a marketplace, not an ad network, and not a data broker. There is no commercial relationship between this site and any measurement device manufacturer, standards body, or retail vendor.

Editorial Standards

• Source hierarchy: NIST, BIPM, and ISO are the only primary sources cited. Wikipedia, secondary aggregators, and third-party converters are never used as authority.
• Precision policy: All conversion factors are stored at their exact defined value or at minimum 15 significant figures. Display rounding is applied only at the final render step.
• Correction policy: Errors reported to contact@caltolbs.com are reviewed and corrected within 7 days. Substantive corrections are logged on this page.
• No sponsored content: No vendor has paid for placement, priority, or alteration of any conversion factor on this site.

Data Sources

1. NIST Handbook 44, Appendix C — Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices.
2. BIPM SI Brochure, 9th edition — The International System of Units (SI).
3. ISO 80000-1:2009 — Quantities and units, Part 1: General.
4. IEC 80000-13 — Quantities and units, Part 13: Information science and technology.

Privacy Model

All conversions run entirely in your web browser. No input value, unit selection, or calculation result is transmitted to our servers. We do not use analytics that log input values, and we do not sell, share, or rent any data — because we do not collect any.

Full details in our Privacy Policy.

Independence Statement

CaltoLbs is independently operated. It is not affiliated with NIST, BIPM, ISO, IEC, or any national metrology institute. References to these bodies are citations to their published standards, not endorsements.

Contact

Editorial corrections: contact@caltolbs.com

Full contact details: Contact page