Ultimate Unit Converter is a free to use web tool that helps you convert measurements between various units. While most unit conversion sites make you type in your measurement quantity, select its unit, and then select the output format, with Ultimate Unit Converter all you do is type in the complete measurement with units. The type of measurement is automatically detected and you are shown the conversions to various other units of the same measurement type.

For instance typing in “612 square meters” will show results in acres, boards, dunams, roods, and other units.

You can select the sorting order of units and their type from an options panel located to the right of the units. You can select from the following categories: agricultural, imperial, metric, surveying, and US.

Features:

• A user-friendly web service.
• Lets you convert measurements from one unit to another.
• Automatically detects unit type and shows conversions to other units.
• Lets you select system of units.
• Similar tools: Unit Converter, Conversion Tool, UnitConverter.org, eCalc, ConvertWorld, YouConvertIt and ConvertCenter.

Check out Ultimate Unit Converter @ www.ultimateunitconverter.com (by MOin from ThumbPress)

Sooeet is a free and simple to use website that offers conversion tools for a variety of measurements and units. You can find the categories available on the left. These categories range from weight and volume to temperature and torque. After clicking on a category you select a sub-calculator for units. Next you enter the value to be converted and click on the “Convert” button. Your required answer is displayed instantly.

Sooeet will prove to be a very helpful website for science and engineering students. It will also be very helpful for people who use the metric and SI systems of measurement together.

Features:

• A user-friendly website.
• Lets you convert and calculate measurements between units.
• Covers a wide variety of measurements.
• Displays answers in an instant.
• Very helpful for science and engineering students.
• Will benefit people who use the metric and SI systems both.
• Similar tools: Converticious, Conversion Tool and Unit Converter.

Check out Sooeet @ www.sooeet.com (via RedFerret) (by MOin from ThumbPress)

Converter is a Firefox add-on. Its options are displayed in the image above; it lets you convert length, time, speed, temperature, and currency units. All of these are extremely helpful on any site that involves units other than your preferred ones. All you have to do is highlight the measurement along with its units and right-click; the converted figure will be displayed in the resulting menu as in the image below.

The options also let you select the default decimal indicator: dot or comma.

With your defaults set, you can right click on any webpage and use the add-on’s feature to convert all units and figures displayed into your preferred choices.

A simple add-on with great utility, Converter will be appreciated by all Firefox users particularly the ones who shop from international online retailers and require quick currency conversions.

Features:

• A user friendly converter in firefox.
• Lets you convert units quickly.
• Lets you convert representation of numbers.
• You can individually convert figures or convert the entire webpage.

Check out  Converter @ https://addons.mozilla.org/en-US/firefox/addon/2286 (By Umar from TechCityInc)

Conversion Tool is a wonderful free to use website that does exactly what its name suggests: it performs unit conversions. Three types of measurements are supported: length, temperature, and weight.

Length units include inches, feet, meters, miles, centimeters, and kilometers; temperature units include Fahrenheit and Celsius; weight units include grams, kilograms, milligrams, ounces, pounds, and stone. You select a measurement from the virtual dial and then select your “˜to’ and “˜from’ units. These units can belong to different measurement systems or the same; this gives you the most conversion options. With your units selected, type in any quantity in either text box ““ left or right ““ and the other one will automatically get updated with the corresponding value.

Features:

• A user friendly web service.
• Has a clean layout.
• Provides a wide range of unit conversions.
• Supports SI and Metric system units for length, temperature, and weight.
• Updates the values itself.
• Similar tools: Converter, UnitConverter.org, Converticious, Unit Converter, ConvertCenter and ConvertWorld.

Check out Conversion Tool @ www.convert.francepropertyshop.com (By Umar from TechCityInc)

Using this extension couldn’t be easier: just highlight the measurement you don’t understand, right-click and you’ll see your conversion. Heck, this thing can even convert one currency to another.

If Converter comes across something it doesn’t understand it will give you the option of manually selecting what unit you’re trying  to convert to what. You can get a good understanding of the sorts of units Converter can handle by checking out their examples page.

You can even embed this service into your website, allowing everyone who visits to make use of it regardless of the browser they use. This can be a useful tool for your readers, so check it out.

Features

• Convert measurement units in your borowser.
• Firefox extension, or built into any website.
• Works with currency as well as units of measurement.
• Similar tools: UnitConverter.org, Converticious, Unit Converter, ConvertCenter and ConvertWorld.

Check out Converter @ mozdev.org

Once you select your body font size, you can get CSS code to start with, by clicking on “Get CSS” tab on the site. PXtoEM free for use and does not require any registration.

Features:

• Quickly convert Pixels to EMs
• Get a complete pixel to em conversion table.
• Based on your body font size, get CSS code to start with.
• Manually convert between PX and EM values to get custom conversions.
• Free for use, no sign up required.

Check out PXtoEM @ www.pxtoem.com (by Srikanth AD from Techonaut)

What makes UnitConverter stand out from many other online converters is an option to add desired converters to your blog or personal website. There is no doubt that many people can make use of this.

Moreover, there is an offline UnitConverter that users can download and use it offline.

Features:

• Free unit converters to convert almost anything to anything.
• Converters are organized in categories etc.
• Embed unit converters onto your site or personal web page.
• Desktop application is also provided.

Check out UnitConverter @ www.unitconverter.org

It supports simple and scientific math functions (sin, cos, log etc), instantly highlights any errors in your input and automatically saves a history of your previous calculations. Simply enter any short or long calculation like 6*(5+10) and hit Enter to calculate. You can give names to your previous calculations (i.e 2+3=5=a) and use them in other calculations (a*2=10). No need to register.

There is also a unit converter that lets you convert between various dimensional units.

Features:

• Easy to use virtual scientific calculator and converter.
• Clean and simple interface.
• Automatically saves history of previous calculation results.
• Give names to previous calculation results and use them in future calculations.
• Convert between various units (distance, currencies, speed, weight etc).
• Save history of previous conversions below.
• No registration needed.
• Similar tools Encalc, eCalc and InstaCalc.

Check out Calcoolate @ www.calcoolate.com

Features:

• Online unit conversion tool.
• Convert temperature, volume, distance, weight, area and  speed units (more units and convention options are coming).
• Clutter free and user friendly interface.
• No sign up and free.
• Similar apps: Unit Converter, ConvertCenter and ConvertWorld.

Check out Converticious @ www.converticious.com

Features:

• Online unit conversion tool.
• Supported conversions; angle, area, bits & bytes, density, electric current, energy, force, fuel consumption, length, mass, power, pressure, speed, temperature, time and volume.
• Quick, simple and easy to use.
• Similar sites: ConvertCenter and ConvertWorld.

Check out Unit Converter @ www.digitaldutch.com/unitconverter