About Free Weight Converter.
Free Weight Converter is a free online tool for converting between weight and mass units. Whether you need to convert pounds to kilograms for travel, grams to ounces for a recipe, troy ounces for bullion pricing, or metric tons for industrial calculations - we make it instant and accurate.
Built for speed and privacy
Every conversion runs entirely in your browser. No data is sent to any server, no account is required, and no ads interrupt your workflow.
Accuracy you can trust
We use exact conversion factors from NIST, ISO, and CODATA standards. For example, one avoirdupois pound equals exactly 0.45359237 kilograms, and one troy ounce equals 31.1034768 grams. Results are computed with high precision and formatted for readability, including scientific notation for very large or small values.
Supported units
- Metric: microgram, milligram, gram, kilogram, metric ton, quintal
- Imperial & US customary: ounce, pound, stone, dram, quarter (uk), hundredweight (us), hundredweight (uk), us ton, imperial ton
- Troy & apothecary: pennyweight, troy ounce, troy pound
- Science: atomic mass unit
- Other: carat, grain
Accessibility
Free Weight Converter is designed to be usable by everyone. Searchable unit selectors support keyboard navigation, results update with live regions for screen readers, and the interface meets WCAG contrast requirements in both light and dark modes.
Contact
Free Weight Converter is maintained at freeweightconverter.com. For questions or feedback, visit our Contact Us page or email us at pratimmajumder1@protonmail.com.