Ans

Unit converter

Kilograms to grams.

Convert kg to g and g to kg. Type in either box and the other follows. A thousand grams to the kilogram. Recipe quantities and postage limits are often quoted in different ones of the two.

kg → gExact definition
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Kilograms to grams — common values, to 6 significant figures.
kgg
0.1 kg100 g
0.25 kg250 g
0.5 kg500 g
1 kg1000 g
1.5 kg1500 g
2 kg2000 g
5 kg5000 g
10 kg10000 g
25 kg25000 g
1 kg=1000 g 1 g=0.001 kg

Definitions

  • The kilogram is the SI base unit of mass, defined since 2019 by fixing the Planck constant rather than by a metal cylinder in Paris.
  • The gram is a thousandth of a kilogram, and the unit food packaging and recipes are labelled in.
  • This conversion is exact by definition. 1 kg = 1000 g.
  • Everything here is mass, not force. The pound is defined as exactly 0.453 592 37 kg, so pound-to-kilogram conversion is exact.

How it works

One direction multiplies and the other divides by the same number, so nothing is lost by going back and forth.

The value passes through kg, the unit every other mass & weight unit on the site is defined against, rather than a number written into this page on its own. That is why the figure here, the figure in the table above and the general mass & weight converter always agree.

Display precision limits significant figures rather than decimal places, because one fixed number of decimals is useless across a range this wide. Very large and very small results switch to scientific notation with a proper superscript exponent. The editable box always holds a plain number at full working precision, so you can carry on from either side.

Common questions this answers: how many grams in a kilogram (1000), how many kilograms in a gram (0.001), and what 2 kg is in grams (2000 g).

From the maker of Ans — a scientific calculator you can own. Same idea: a proper instrument, nothing in the way.