"Stephen M. Henning" wrote...
Here is another one:

1) A liter of water is one kilogram by definition.
2) One kilogram is 2.2 pounds.
3) A quart is 2 pounds.

4) Hence, a liter is 1.1 quarts.

Conversion charts say that a liter is 1.0566882607957349 quarts. Why
the difference?


Conversion from mass to force is not exact and depends on conditions.
The same holds true for volume and force (or volume and mass). Water
volume changes (slightly) when temperature changes. For most of us
two or three significant digits is good enough.