Convert common metric and imperial mass units, from micrograms through tonnes, pounds, ounces, and stone.
Kilogram to Pound
ExactCategory meaning
Mass describes the amount of matter represented by a measurement. Everyday language often says “weight” for values in kilograms or pounds, but this category converts mass units and keeps force units such as newtons separate.
Calculation method
Mass conversions are linear and pass through the kilogram, the SI base unit of mass. Metric prefixes scale by powers of ten, while reviewed definitions connect pounds, ounces, stone, short tons, long tons, and troy units to the kilogram.
Kilograms provide the common reference for converting between the available metric and imperial mass units.
The kilogram definition and published conversion factors establish each unit relationship. The live converter and examples use those same relationships, while the display controls affect only the visible rounding and notation.
About the converter’s methodologyChoose the right unit
Start with the measurement context, then select the symbol shown by the source. Every family below contains units compatible within this category.
Metric prefixes cover trace quantities through tonnes, with the kilogram serving as the SI base unit and category reference.
Milligram Gram Kilogram Metric Tonne
See all 10 unitsGrains, drams, ounces, pounds, and stone appear in food, goods, body-mass, shipping, and traditional measurement contexts.
See all 5 unitsHundredweights, short and long tons, troy units, carats, and slugs require their named system to remain explicit.
Carat Short Ton Long Ton Troy Ounce
See all 8 unitsChoose a common direction and start with the units already selected.
Calculated examples
Each example is calculated from the same unit definitions used by the interactive converter, so the worked values stay consistent with the result above.
1 lb = 0.45359237 kg
1000 g = 1 kg
1 oz = 28.349523125 g
Avoid common mistakes
Kilograms and pounds in this guide are treated as mass units. Newtons and pound-force describe force and belong to the Force category.
These names represent three different masses. Choose Metric Tonne, Short Ton, or Long Ton explicitly when the source uses the ambiguous word “ton.”
The common ounce and pound use the avoirdupois system. Troy ounce and troy pound are separate units traditionally used for precious metals.
Unit field guide
These profiles focus on decisions that affect a real conversion: what the unit represents, where it appears, when to select it, and which similarly named quantity can produce the wrong result.
The kilogram is the SI base unit of mass and the reference unit for this category. One kilogram contains exactly one thousand grams.
The international avoirdupois pound is a mass unit defined as exactly 0.45359237 kilograms. One pound contains sixteen avoirdupois ounces.
1 lb = 0.45359237 kg
The troy ounce belongs to the troy mass system. It is a different unit from the avoirdupois ounce used for ordinary goods.
1 oz t = 0.0311034768 kg
Compatible catalog
Every unit below measures linear length, so any two can be converted directly. The groups help you find a unit by the scale and setting in which it is commonly used.
Nanogram
Compatible mass unit.
ngMicrogram
Compatible mass unit.
µgMilligram
One thousandth of a gram; used for small measured quantities.
mgCentigram
Compatible mass unit.
cgDecigram
Compatible mass unit.
dgGram
One thousandth of a kilogram; widely used for food and laboratory quantities.
gDecagram
Compatible mass unit.
dagHectogram
Compatible mass unit.
hgKilogram
SI base unit of mass and the reference unit for this category.
kgMetric Tonne
Metric tonne equal to one thousand kilograms.
tGrain
Compatible mass unit.
grDram
Compatible mass unit.
drOunce
Avoirdupois ounce used for common goods and food measurements.
ozPound
International avoirdupois pound defined relative to the kilogram.
lbStone
Mass unit equal to fourteen avoirdupois pounds.
stCarat
Mass unit used for gemstones.
ctShort Hundredweight
Compatible mass unit.
cwt (US)Long Hundredweight
Compatible mass unit.
cwt (Imp)Short Ton
US short ton; distinct from the metric tonne and imperial long ton.
ton (US)Long Ton
Imperial long ton; distinct from the metric tonne and US short ton.
ton (Imp)Troy Ounce
Troy-system unit commonly associated with precious metals.
oz tTroy Pound
Compatible mass unit.
lb tSlug
Compatible mass unit.
slugMass conversion helps reconcile recipes, shipments, laboratory results, and product specifications written in different mass units.
Helpful answers
It converts units conventionally used for mass, including kilograms and pounds. Force units such as newtons belong to the separate Force category.
Yes. The international avoirdupois pound is defined as exactly 0.45359237 kilograms.
Use tonne for 1,000 kilograms, short ton for 2,000 avoirdupois pounds, and long ton for 2,240 avoirdupois pounds. A source that says only “ton” needs regional or technical context.
No. The troy ounce belongs to the troy system, while the ordinary ounce in this catalog is avoirdupois. Select the troy unit only when the source identifies it.
The kilogram is the SI base unit of mass and the reference unit for this category. Every supported mass unit has a reviewed relationship to it.
Round after the conversion to the precision supported by the original measurement and the receiving specification. Keep the full calculator value when an intermediate result feeds another calculation.
