Free online weight converter with 100+ units. Convert metric, imperial, troy, apothecary, Asian, ancient, scientific, and cooking weights instantly.
How to Use the Weight Converter
Enter a weight value, select the source unit from any of the 9 categories (Metric, Imperial, Troy, Apothecary, Cooking, Asian, Ancient, Scientific, Miscellaneous), and select the target unit. Results and a full conversion table appear instantly. Use the search box to filter the 100+ units by name.
About This Tool
The most comprehensive free weight converter online, featuring over 100 units across 9 categories. Convert everyday metric and imperial units, precious-metal troy weights, pharmacy apothecary measures, Asian units (jin, tael, momme, tola), ancient weights (Greek talents, Roman libra, Biblical shekels), scientific units (atomic mass, solar mass, carats), and even kitchen measures like cups of flour or sticks of butter. Use alongside the Length Converter or BMI Calculator for full measurement conversion.
Quick Reference Table
| Category | Example Units |
|---|---|
| Metric | kg, g, mg, µg, tonne, quintal |
| Imperial / US | lb, oz, stone, grain, slug, long/short ton |
| Troy | troy oz, troy lb, pennyweight, mite, doite |
| Apothecary | apothecary lb, oz, dram, scruple |
| Cooking | tbsp, tsp, cup (flour/sugar/butter), pinch |
| Asian | jin, liang, momme, tael, tola, maund, seer, baht |
| Ancient | talent, mina, drachma, shekel, libra, uncia, deben |
| Scientific | AMU, dalton, electron mass, solar mass, carat |
| Miscellaneous | pood, pfund, livre, arroba, oka, batman |
Frequently Asked Questions
How many units does this weight converter support?
Over 100 weight and mass units across 9 categories: Metric, Imperial/US, Troy, Apothecary, Cooking, Asian, Ancient, Scientific, and Miscellaneous historical units.
How do I convert kilograms to pounds?
Multiply the number of kilograms by 2.20462. For example, 75 kg = 165.35 lb. This converter does the math for you instantly.
What are troy ounces and when are they used?
Troy ounces (31.1035 g) are used for precious metals like gold, silver, and platinum. They are heavier than regular (avoirdupois) ounces (28.3495 g).
Are the ancient weight conversions accurate?
Ancient units are based on the best available archaeological and historical evidence. Values like the Attic Greek talent (~25.86 kg), Roman libra (~328.9 g), and Biblical shekel (~11.4 g) are widely accepted by historians.
Can I use this for cooking measurements?
Yes. The Cooking category includes tablespoons, teaspoons, cups of flour/sugar/butter, sticks of butter, and pinches — all based on standard US cooking weights.
Do I need to sign up to use this tool?
No. It is completely free with no account or signup required.