US customary and Imperial units are different
A US liquid gallon and an Imperial gallon are not the same size. The same distinction applies to fluid ounces, pints and quarts, so Toolmera labels those systems directly in each unit name.
Metric units use liters as the common base while US and Imperial definitions are converted to their exact or standardized liter equivalents.
US liquid gallon3.785411784 L
Imperial gallon4.54609 L
US fluid ounce29.5735295625 mL
Imperial fluid ounce28.4130625 mL
Recipe conversions need the right cup definition
Toolmera labels the included cup as US customary cup. Recipe standards can vary by country, publisher and measuring set, so check the source recipe when exact culinary volume matters.
The conversion matrix keeps every unit label visible to reduce accidental mixing between measurement systems.