Unit Conversion Calculator
UNITS MASTER

Supports 30+ length, distance and area units.
1000+ unit conversion combinations between US, imperial and metric units.
Calculates and converts fractions and decimals.

Perfect for engineering, construction, building, scientific, technical and mathematical calculations with units, dimensional math and analysis as well as simple unit and fraction/decimal conversion.

UNITS MASTER saves your time and helps you eliminate calculation errors.

Units Master for iPhone, iPad and Android
Units Master for Mac
Units Master for Windows

Core Features

Comprehensive list of units

Supports an extensive list of length and area units. On top of commonly used units such as inches, feet, yards, miles, mm, cm, m, km, the app addresses niche needs and helps you convert between less commonly used units as points, links, mils, furlongs, square rods, square chains etc.

Advanced unit conversion

Converts both fractional and decimal units within the same or between different measurement systems. In addition, the app performs conversion when length, distance or area is defined in several units. For example, you can convert 1yd2ft3in, 1/5ft2in, 8km238m, 0.5m8cm9mm etc. And while doing this, you can easily choose to display the result in any supported unit or even in mixed units. For example, you may choose to convert 3m95cm to feet-inches or yard-feet-inches.

User friendly interface and easy navigation

Units Master provides the intuitive input interface for various units and fraction/decimal math. It supports a natural display for fractions and shows both the expression and the result so you can easily check the expression and quickly identify and fix any input errors.

Basic and complex calculation

Units Master can handle a wide range of math operations, including basic operations such as addition, subtraction, multiplication, and division, as well as more advanced ones such as square root, exponential and trigonometric calculations as well as calculations with fractions, decimals and mixed numbers.

Advanced settings

Due to the intelligent data analyzing algorithm you may easily adapt the app to your needs - get the result in a desired unit or unit combination, have the results in both fractional and decimal forms, round results to usable fractions or adjust the number of decimal places, choose the default units and output format and more.

History and Sharing capabilities

The app stores previous calculations for easy reference as well as share calculation and conversion history.

Offline Functionality

You don't need to have an Internet connection to use the app, that allows you to use Units Master from anywhere and anytime.

Unit calculation

• Supports 36 built-in standard (US) and metric length, distance and area units.
• Intuitive interface for units input.
• Calculates fractions and decimals.
• Calculates linear and square measurements in metric units.
• Calculates linear and square measurements in US/imperial units, including feet-inch-fractions, inch fractions, decimal feet, decimal inches and more.
• Performs calculations when metric and US units are mixed.
• Converts results between different units with one click.
• Shows the result in desired unit(s) in a fractional and/or decimal form.
• Displays both the expression and the result.

Unit calculator

Professional unit conversion calculator

• More than 1000 conversion combinations.
• Converts between fractions and decimals:
   - decimal to fraction conversion
   - fraction to decimal conversion
• Converts between US, Imperial and metric length and area units, including commonly used inches/centimeters/millimeters, feet/yards/meters, square inches/square feet/m² and other length and area units conversions.
• Converts between units in the same system:
   - conversion between metric units
   - conversion between US units
• Fractional and decimal unit conversion, including foot-inch-fraction to decimal format conversion.
• One-click result conversion - just click the unit button you want the result value to be converted to.
Unit converter

Works as a standard calculator

• Addition, subtraction, multiplication and division.
• Calculations with parentheses, including nested parentheses.
• Fraction and decimal math.
• Powers, trigonometric functions.
• Intuitive fraction input.
• Constants: π (pi).
• Trigonometric calculations in Degrees and Radians.
• Square Root.
• Fraction to decimal and decimal to fraction conversion.
• Reduce fractions and mixed numbers.

Scientific calculator

Customize the app to address your unique requirements

• Three output modes for results: Automatic, US (imperial) and Metric.
• Round results:
   - Decimal numbers can be rounded to 0-8 of significant figures. You can set up the app to round decimals to tenths, hundredths, etc. By default, the result is rounded to 10ths.
   - For fractions, you may round the results to the nearest 1/2, 1/4, 1/8, 1/12, 1/16, 1/32, 1/64, 1/128, 1/256. If you do not need to round fractions, just select "-".
• 7 color themes.
• Use the app in either portrait or landscape mode.
Units Master Settings

Why use Units Master?

If you’ve ever had to perform calculation involving inches and feet or conversion from yards to meters or from square kilometers to square miles, then you know that it’s not so easy and time consuming:
- First, you need to know the conversion factors and formulas.
- And even if you remember them or search for them, it takes a significant amount of time to complete the task.
- The problem becomes more complex if you need to operate with fractional values or even with a mixture of fractions and decimals as you additionally need to care about fraction and decimal math.

Units Master is an essential tool for everyone who needs to perform fast, accurate and efficient calculation with US customary units, British (imperial) units and SI units.

Who can benefit from using Units Master?

- The app is useful for engineers, contractors, DIYs, builders, architects, plumbers, carpenters, designers, scientists, teachers, students, travelers, and anyone who needs to solve various unit conversion problems on a daily basis.
- Unit Master would be very helpful for students who need to understand the different measurement systems or quickly check results while mastering their dimensional analysis skills.

Save Time and Reduce the Risk of Human Errors

One of the key advantages of using Units Master is the ability to save time and ensure reliable results by reducing the risk of inaccuracies that can occur while manual calculations. With the Units Master calculator, you can perform precise calculation and solve problems that would take hours to complete manually, in seconds.

End-to-end solution for calculations of any complexity

While many online tools or traditional calculators support most frequent scenarios of unit calculation and conversion, they usually can’t solve complex problems. And, at the end, you still need to finalize the calculation on your own.

Units Master uses a data analyzing algorithm, which supports intelligent input of complex expressions involving SI (or metric) units, US customary units and imperial units in both decimal and fractional formats. The app helps you with various types of calculations with units – from the problems when you need to add, subtract, multiply, or divide various units to situations when you need to calculate more complex expressions involving various combinations of supported units; fractions, decimals, and mixed numbers; brackets, trigonometric functions and more.

Special Functions

Fraction input
• Intuitive interface for fraction input.

Switch between keyboards
• Switch between the keyboards.

Convert metric and US systems
• Convert results between standard and metric systems.

Converts units in the same systems
• Convert results between units within the same system.

Recall equation
• Back and Forward buttons to find and recall recent calculations.

Undo the clear command
• 'Undo' for the Clear command.

Calculation and conversion history
• History Tape to view and share calculations.

Share calculation
• Share calculation results via email.

Comprehensive unit coverage

Supporting 18 length and 18 area (or squared) units, Units Master will take care of more than 1000 conversions. So, in addition to common conversions between millimeters, centimeters, meters, kilometers, inches, feet, yards and miles, the application will help you convert mils to mm, feet to chains, points to inches, millimeters to picas, links to feet, meters to rods, furlongs to miles, fathoms to meters and more. You can also easily switch between square inches, square feet, square yards, square miles, square millimeters, square centimeters, square decimeters, square meters, square kilometers, acres, hectares as well as more specialized units as square mils, square links, squares, square rods, square chains, ares and townships. The full list of supported units.

Despite many advanced functions, the app has clean user interface and has been carefully prepared in a way that makes a learning curve as short as possible. For more information visit the Units Master FAQ and Help Section.

Friday, September 12, 2025
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