API Reference > imodeljs-Quantity > Quantity Quantity Classes, Interfaces, and definitions used to format and parse quantity values. Classes Name Description BadUnit This class is a convenience class that can be returned when a valid Unit cannot be determined. Beta BasicUnit This class provides basic implementation of UnitProps interface. Beta Format A class used to define the specifications for formatting quantity values. Beta Formatter A helper class that contains methods used to format quantity values based on a format that are defined via the Format class. Beta FormatterSpec A class that contains both formatting information and the conversion factors necessary to convert from an input unit to the units specified in the format. Beta Parser A Parser class that is used to break a string that represents a quantity value into tokens. Beta ParserSpec A ParserSpec holds information needed to parse a string into a quantity synchronously. Beta Quantity The Quantity class is convenient container to specify both the magnitude and unit of a quantity. Beta QuantityError The error type thrown by this module. Beta Enumerations Name Description DecimalPrecision Precision for Decimal, Scientific, and Station formatted value types. Beta FormatTraits Beta FormatType Supported format types Beta FractionalPrecision Precision for Fractional formatted value types. Beta ParseError Possible parser errors Beta QuantityStatus Status codes used during Quantity parsing and formatting processing. Beta ScientificType required if type is scientific Beta ShowSignOption Determines how the sign of values are displayed Beta Global Functions Name Description isCustomFormatProps CustomFormatProps type guard. Beta Interfaces Name Description CloneOptions CloneOptions that define modifications that can be made during the cloning of a Format. Beta CloneUnit CloneFormat defines unit and label specification if primary unit is to be set during clone. Beta CustomFormatProps This interface is used when supporting Custom Formatters that need more than the standard set of properties. Beta FormatProps This interface defines the persistence format for describing the formatting of quantity values. Beta ParsedQuantity Successful result from Parser.parseToQuantityValue or Parser.parseToQuantityValue. Beta ParseQuantityError Parse error result from Parser.parseToQuantityValue or Parser.parseToQuantityValue. Beta PotentialParseUnit Interface that defines potential parse units that may be found in user's string input of a quantity value. Beta QuantityProps This interface defines the required properties of a Quantity. Beta UnitConversion This interface defines the properties required to convert a quantity value from one unit to another such as from meters to feet Beta UnitConversionSpec Interface that defines how to convert between a specific unit an another in synchronous formatting or parsing processing. Beta UnitProps This interface provides basic information about a Unit that is return from a UnitProvider. Beta UnitsProvider This interface is implemented by the class that is responsible for locating units by name or label and providing conversion values between units. Beta Type Aliases Name Description QuantityParseResult Defines Results of parsing a string input by a user into its desired value type Beta Last Updated: 29 November, 2022