Utilities Windows
Master Converter
Convert measurement units, find units by search and add custom conversion factors with Master Converter, a shareware Windows utility from Savard Software.
- Operating system
- Windows; specific supported versions not established
- Architecture
- Not specified in the inspected publisher sources
- Download package
- EXE installer (mcsetup.exe)
Publisher catalog lists version 2.9 from 2011. No installer was downloaded or run; current Windows compatibility is unverified.
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What is Master Converter?
Master Converter converts units of measurement in a Windows desktop interface. The publisher lists more than 800 units across 42 categories, from length, area and temperature to data storage and electrical measurements. Search helps locate a unit, while clipboard copying lets you transfer a conversion into another program. You can also customize unit and category sorting, fonts and the result number format.
Its custom-unit support is useful when a needed unit is missing, but it is not a general formula editor: the publisher says a custom unit must be a simple multiple of another unit. Master Converter is shareware, not freeware; registration removes an opening wait screen. The publisher catalog lists version 2.9 with a May 27, 2011 release date. Compatibility with current Windows versions has not been established here.
What it offers
- Convert more than 800 units across 42 measurement categories, according to the publisher.
- Search for units and copy conversion results to the clipboard.
- Add custom units and categories using simple multiplicative conversion factors.
- Convert decimals to fractions and work with number bases from 2 to 36, plus Roman numerals.
- Adjust fonts, unit and category sorting, and result number formatting.
Good to know
- Custom units support simple multiples of an existing unit, not arbitrary conversion formulas.
- Unregistered shareware displays an opening wait screen; the publisher lists a $15 registration fee.
- The listed release dates to 2011; compatibility with Windows 10 or 11 and package architecture are unverified.
Product images

Sources
References used for this listing. Retrieval dates do not indicate hands-on testing.