## Monday, July 11, 2011

### Online Calculators and Converters

The Internet is brilliant for finding just about everything!

It is especially easy to find plenty of free online apps for calculating and converting. There are free online converters for just about anything you could ever want to do.

My son told me that Google is the best search engine for finding converters. Whenever he hits a problem he cannot do in "Matheletics" online games, he just Googles to find a converter app that can get him the answers he needs.

In this post we provide links to our favorite free online converters.

If Blogger sites are blocked in your school, then you can also read this post at our Mathematics blog on WordPress by clicking the link below:

http://passyworldofmathematics.wordpress.com/

Note that to get to each converter, it is necessary to Click the Link that we have supplied. Clicking the screen shot of the Converter, does not take you to the online app.

(Eg. Because it is a bit tricky to do picture links in Blogger, we haven't bothered connecting the screen shots to the apps, but instead provided direct text links.)

Scientific Calculator

This calculator works like TI and Casio calculators, and so is very easy to use. It also has a "Full Size" button we can click to make it go full screen.

Click the link below to use this scientific calculator online.

http://www.mathopenref.com/calculator.html

Graphing Calculator

The above online calculator can draw graphs with up to four different variables input.

As shown above, we enter a Quadratic Parabola in the form: x*x + 2*x + 1

http://www.mathopenref.com/graphfunctions.html

Online Basic Calculator

This calculator can be used online to do any basic calculation, and is full screen size.

Even without special function buttons, we can still do tasks like converting Fractions to Percentages.

Eg. To convert 1/4 to % we could type in 1 divided by 4 then x100 and then press the equals button to get our required answer of 25%.

http://www.amblesideprimary.com/ambleweb/mentalmaths/BigCalculator.html

Online Percentage Calculators

Here are some Online Percentage Calculators that are very useful.

Fraction to Decimal Calculator

Simply enter the fraction we want to convert into the bottom right hand corner area and then click the "Calculate" button.

http://www.amblesideprimary.com/ambleweb/mentalmaths/fracto.html

Percentages and Amounts Calculator

This calculator is easy to use and gives Percentages and Values as shown above. Pick which calculation you want to do. You do not have to do both calculations like we have done.

http://www.onlineconversion.com/percentcalc.htm

3-Way Online Percent Calculator

http://www.math.com/everyone/calculators/calc_source/percent.htm

Fractions and Percents Converters

These two calculators can be found at the following links, and work as shown above.

http://www.calculatorsoup.com/calculators/conversions/fractiontopercent.php

and

http://www.calculatorsoup.com/calculators/conversions/percenttofraction.php

Fractions Calculators

"Calculator Soup" has a full set of fractions calculators, including Simplifying, Conversions, and Addition, Subtraction, Multiplication, and Division.

To use any of these great free online calculators, simply click the link below:

http://www.calculatorsoup.com/calculators/math/fractionscalculators.php

Rounding Off Calculator

"Calculator Soup" also has a great rounding off Calculator that can do whole numbers as well as decimals rounding.

http://www.calculatorsoup.com/calculators/math/roundingnumbers.php

Factors Calculator

This calculator finds all of the factors of any number.

http://www.classbrain.com/artteach/publish/article_48.shtml

Highest Common Factor Calculator

This calculator will find the Highest Common Factor for a group of number. Remember to separate the numbers with commas when entering them.

http://www.calculatorsoup.com/calculators/math/gcf.php

Multiples Calculator

This online calculator gives the first hundred multiples of any number.

http://www.calculatorsoup.com/calculators/math/multiples.php

World Time Converters

The "Time and Date" website has everything we need for working our World Time. As shown above, it is very easy to use the world time converter.

http://www.timeanddate.com/worldclock/converter.html

World Time Now

The "Time and Date" website also has a World clock we can bring up that tells us the current time in all of the world's major cities.

http://www.timeanddate.com/worldclock/

Metric Length Converter

The following web page has an easy to use metric length converter.

http://www.onlineconversion.com/length_metric.htm

Calculators to Convert Anything

The "Online Conversion" website has calculators to convert just about anything: Length, Weight, Volume, Angles, Temperature, Cooking Measures, etc. Go to this page and then navigate down through the calculators to find what you need.

http://www.onlineconversion.com/

Currency Conversion

The XE converter has been around for a few years and is very easy to use.

http://www.xe.com/ucc/

Once we have our converted result, we can click on the "Rates" tab to see the current major conversion rates for the two currencies we just converted.

We get a listing of conversion rates like this.

Note the above listing also has "Inverse" values for going backwards, from say Canadian Dollars to Australian dollars, where 1 Canadian will get 0.96891 Australian.

Simple Interest Calculator

This is a great online Interest Calculator, because it gives a fully worked solution on the answer page.

This is a very impressive piece of web page programming.

You can access the calculator at this link:

http://www.webmath.com/simpinterest.html

Compound Interest Calculator

This is a Compound Interest Calculator, which allows for a savings plan, where we can add to our money each month if we want to.

If we did not want to have any extra amount added, we could just set the

"Add an extra" to box zero.

This is a very well set up application.

http://jaw.iinet.net.au/stuff/interest.html

Discount Calculator

We can use this calculator to get discounts. But this calculator is extra nice, because we can also enter the "Reduced" discounted price, and will it will calculate the original price.

So the calculator works in both directions.

Note that we always have to enter the Percent Value, but we only have to enter one of the three items on the top input line.

http://discount.miniwebapps.net/

There is a Calculator for anything!

Just Google for what you want, (for example, something like "Roman Numerals" which we haven't included on our post), and click the first item that comes up in Google that is non-sponsored.

Well that's everything converted !

Enjoy,

Big Passy Wasabi

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