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Weight Unit Converter

Enter a value in any unit input field, and the system will automatically convert and display corresponding values for all other units. Click the advanced module switches to expand more unit options.

Enter Weight

Enter a value in any unit input field, and other units will automatically sync and update.

t
kg
g
mg
斤
两
lb
oz
Jewelry & Precious Metals
Medical & Scientific
Industrial & Shipping
Agricultural & Traditional
Regional & Rare
Traditional Chinese Medicine

Results are for reference only. By using this tool, you agree to the Disclaimer

Usage Instructions

About Weight Unit Converter

Weight Unit Converter is a fast and precise tool for converting between various weight units. It supports common units used in daily life, as well as specialized units for jewelry, medical, industrial, agricultural, and traditional measurements.

Key Features

  • Common Units: Ton, kilogram, gram, milligram, jin, liang, pound, ounce
  • Jewelry & Precious Metals: Carat, troy ounce, grain
  • Medical & Scientific: Microgram, nanogram, picogram, apothecary pound
  • Industrial & Shipping: Long ton, short ton, deadweight ton
  • Agricultural & Traditional: Dan, shi, dou, stone
  • Regional & Rare: Korean geun, Vietnamese can, dram, drachm
  • Traditional Chinese Medicine: Old system units (liang, qian)
  • Real-time Conversion: Instant conversion as you type
  • High Precision: Accurate conversion factors with appropriate decimal precision
  • Privacy Protection: All conversions performed locally in your browser

Conversion Standards

Base Unit

All conversions use grams (g) as the base unit. Every unit has a precise conversion factor to grams, ensuring accuracy and consistency.

Precision Rules

  • Common Units: Display up to 4 decimal places, automatically removing trailing zeros
  • Jewelry Units: Display up to 6-8 decimal places for high precision
  • Medical Units: Display up to 12 decimal places for scientific accuracy
  • Automatic Formatting: Very large or very small values automatically switch to scientific notation

Important Notes

Troy Ounce vs Avoirdupois Ounce

  • Troy Ounce (t_oz): Used for precious metals, equals 31.1034768 grams
  • Avoirdupois Ounce (oz): Used for everyday items, equals 28.349523125 grams

These two units are different and should not be confused. The tool clearly labels each to prevent errors.

Traditional Chinese Medicine Units

Traditional Chinese medicine units (old system) are available as a separate module. These units are different from modern standards and should only be used for traditional Chinese medicine prescriptions. The tool includes a warning when enabling this module.

Use Cases

  • Daily Life: Convert between metric and imperial units for cooking, shopping, etc.
  • Jewelry: Convert carats, troy ounces for precious metals
  • Medical: Convert micrograms, nanograms for pharmaceutical measurements
  • Industrial: Convert tons for shipping and logistics
  • Agriculture: Convert traditional Chinese units for agricultural measurements
  • Education: Learn and understand different measurement systems

FAQ

Q: How do I reset all inputs?

A: Click the "Reset" button (rotating arrow icon) in the top-right corner of the input area to clear all input data and restore to the initial state.

Q: Which units are supported?

A: Supports common units (ton, kilogram, gram, milligram, jin, liang, pound, ounce), jewelry units (carat, troy ounce, grain), medical units (microgram, nanogram, picogram, apothecary pound), industrial units (long ton, short ton, deadweight ton), agricultural units (dan, shi, dou, stone), regional units (Korean geun, Vietnamese can, dram, drachm), and traditional Chinese medicine units.

Q: What is the conversion precision?

A: All conversions use grams as the base unit with precise conversion factors. Common units retain up to 4 decimal places, jewelry units retain up to 6-8 decimal places, and medical units retain up to 12 decimal places.

Q: Is data automatically saved? Will it be lost when refreshing the page?

A: Yes, input data is automatically saved to browser local storage. Refreshing the page won't cause data loss, and you can continue editing previously entered content. Data is automatically saved about 400ms after you stop typing.

Q: What is the difference between troy ounce and avoirdupois ounce?

A: Troy ounce (t_oz) is used for precious metals and equals 31.1034768 grams; avoirdupois ounce (oz) is used for everyday items and equals 28.349523125 grams. They should not be confused.