Weight Unit Converter

Enter a mass in any unit below and instantly view equivalent values across metric, imperial, U.S., Chinese, apothecary, troy, and other specialized systems.

Metric System

International System of Units used worldwide in science and industry.

Picograms (pg)

Nanograms (ng)

Micrograms (µg)

Milligrams (mg)

Grams (g)

Kilograms (kg)

Metric Tonnes (t)

Imperial & U.S. Customary

Common household and commercial measures used in the UK, U.S., and related systems.

Avoirdupois Ounces (oz)

Avoirdupois Pounds (lb)

Hundredweights (cwt)

Long Tons (UK ton)

Short Tons (US ton)

Chinese Units (市制)

Modernized Shìzhì mass units still encountered in regional commerce.

Qian (钱)

Liang (两)

Jin (斤)

Apothecary & Troy Systems

Historic medical and precious-metal measures still relevant to pharmacists and jewelers.

Grains (gr)

Scruples (s ap)

Apothecaries' Drams (dr ap)

Apothecaries' Ounces (oz ap)

Troy Ounces (oz t)

Troy Pounds (lb t)

Specialty Units

Additional mass units for niche disciplines, shipping, and agriculture.

Carats (ct)

Stones (st)

Sacks (sack)

Usage Tips

Scroll or tap arrows on any field to adjust values and observe proportional mass changes.
Scientific notation is used for extremely large or small numbers to preserve readability.
All conversions use kilogram definitions standardized by the International System of Units.