{"$schema":"https://toolsly.tools/schemas/tool-manifest-v1.json","generated":"2026-06-03T01:11:21.612Z","discovery":{"catalog":"https://toptool.io/tools.json","llmsTxt":"https://toptool.io/llms.txt","sitemap":"https://toptool.io/sitemap.xml"},"relatedTools":[{"slug":"bmi-calculator","name":"BMI Calculator","url":"https://toptool.io/bmi-calculator"},{"slug":"length-converter","name":"Length Converter","url":"https://toptool.io/length-converter"},{"slug":"volume-converter","name":"Volume Converter","url":"https://toptool.io/volume-converter"},{"slug":"speed-converter","name":"Speed Converter","url":"https://toptool.io/speed-converter"},{"slug":"bytes-converter","name":"Bytes Converter","url":"https://toptool.io/bytes-converter"},{"slug":"temperature-converter","name":"Temperature Converter","url":"https://toptool.io/temperature-converter"},{"slug":"salary-converter","name":"Salary Converter","url":"https://toptool.io/salary-converter"},{"slug":"roman-numeral-converter","name":"Roman Numeral Converter","url":"https://toptool.io/roman-numeral-converter"}],"kind":"utility","slug":"weight-converter","name":"Weight Converter","description":"Convert between metric and imperial weight units — mg, g, kg, tonnes, ounces, pounds, stone, US tons.","longDescription":"Convert any mass from milligrams to US short tons. Uses the exact international definitions (1 lb = 453.59237 g, 1 oz = 1/16 lb, 1 stone = 14 lb, 1 US short ton = 2,000 lb), so imperial-to-metric conversions are precise rather than rounded. The table at the bottom shows your value in every common unit at once. Runs entirely in your browser.","category":"calc","categoryName":"Calculators","keywords":["weight converter","mass converter","kg to lbs","lbs to kg","lb to kg","g to oz","oz to g","stone to lbs","stone to kg","tonnes to tons","grams to ounces","mg to g","pounds to kilograms","kilograms to pounds"],"badge":"Converter","url":"https://toptool.io/weight-converter","inputs":[{"type":"number","key":"value","label":"Value","defaultValue":1,"step":0.0001},{"type":"select","key":"from","label":"From","defaultValue":"kg","choices":[{"value":"mg","label":"mg (milligram)"},{"value":"g","label":"g (gram)"},{"value":"kg","label":"kg (kilogram)"},{"value":"t","label":"t (metric tonne)"},{"value":"oz","label":"oz (ounce)"},{"value":"lb","label":"lb (pound)"},{"value":"st","label":"st (stone, 14 lb)"},{"value":"ton","label":"ton (US short ton, 2000 lb)"}]},{"type":"select","key":"to","label":"To","defaultValue":"lb","choices":[{"value":"mg","label":"mg (milligram)"},{"value":"g","label":"g (gram)"},{"value":"kg","label":"kg (kilogram)"},{"value":"t","label":"t (metric tonne)"},{"value":"oz","label":"oz (ounce)"},{"value":"lb","label":"lb (pound)"},{"value":"st","label":"st (stone, 14 lb)"},{"value":"ton","label":"ton (US short ton, 2000 lb)"}]}],"outputs":[{"key":"converted","label":"Converted value"},{"key":"grams","label":"In grams"},{"key":"table","label":"All units","multiline":true}],"invocation":{"webUi":"https://toptool.io/weight-converter","api":null,"notes":"Currently invoked via the web UI at `webUi`. Inputs are form fields; outputs are structured text values. A remote MCP/REST API is planned."}}