Skip to content
user@convertitive:~$convertitive

Weight converters

Weight (more strictly, mass) is measured in kilograms in the metric system and in pounds in the imperial and US customary systems. The metric system traces back to the post-revolution French Republic; the kilogram has been the SI base unit of mass since 1889. Conversion factors here are exact by the 1959 international avoirdupois agreement: 1 lb = 0.45359237 kg.

Popular weight conversions

Grams to Kilograms
g → kg
Grams to Metric tons
g → t
Grams to Ounces
g → oz
Grams to Pounds
g → lb
Grams to Stones
g → st
Kilograms to Grams
kg → g
Kilograms to Metric tons
kg → t
Kilograms to Ounces
kg → oz
Kilograms to Pounds
kg → lb
Kilograms to Stones
kg → st
Metric tons to Grams
t → g
Metric tons to Kilograms
t → kg
Metric tons to Ounces
t → oz
Metric tons to Pounds
t → lb
Metric tons to Stones
t → st
Ounces to Grams
oz → g
Ounces to Kilograms
oz → kg
Ounces to Metric tons
oz → t
Ounces to Pounds
oz → lb
Ounces to Stones
oz → st
Pounds to Grams
lb → g
Pounds to Kilograms
lb → kg
Pounds to Metric tons
lb → t
Pounds to Ounces
lb → oz
Pounds to Stones
lb → st
Stones to Grams
st → g
Stones to Kilograms
st → kg
Stones to Metric tons
st → t
Stones to Ounces
st → oz
Stones to Pounds
st → lb

All weight units

The 6 units below can be selected as source or target inside any weight converter.

Weight units in terms of the kilogram

Every weight unit on Convertitive is defined as an exact ratio of the kilogram (kg), the reference unit for this category. The table below shows what one of each unit equals in kilograms — the constant every converter on this page is built from.

Weight units expressed in kilograms
UnitSymbol1 unit in kilograms
Gramsg0.001 kg
Kilogramskgbase unit
Metric tonst1000 kg
Ouncesoz0.0283495 kg
Poundslb0.453592 kg
Stonesst6.35029 kg

To convert between any two units, Convertitive scales the input to kilograms using these factors and then back out to the target unit — so every result on this page traces to a single, exact definition rather than a chained approximation. Pick any pair above to see the formula, a 50-row reference table, and worked examples.