A conversion chart can be very helpful because it gives you a long string of conversions that are rather common, but that you may not know off the top of your head. If you have a chart on hand, it saves you the trouble of using the internet the look things up. You can simply look at the chart, find the conversion that you need, and get on with the project that you are doing. Below are three examples of times during which you might want assistance. You may need to use a conversion chart if you are trying to do some cooking and you do not know how much of a certain ingredient to put in a specific measuring cup. For instance, a recipe may call for a cup of water, but you may only have a one-quart measuring cup, so you need to be able to figure out how many cups go into a quart of liquid. A conversion chart can also be useful if you are working with currencies. Certain charts will tell you the difference between the United States dollar (USD), the Great Britain Pound (GBP), and the Australian dollar (AUD). For these types of transactions, you need an interactive charter. The values are constantly changing. Computerized charting programs will track all of the movements so that you can know the exact exchange rate at any moment. This can be very helpful if you are trying to exchange your money because you are going to be traveling to Another Country or if you are trading currencies to make money on the Forex market. Finally, you may need a conversion chart if you are doing a science experiment. Much like cooking, experiments use different amounts of certain materials. If you get the ratios wrong, the experiment may not work. Furthermore, much research was done using the metric system, but the parameters of your experiment may be laid out using the standard American system. You will have to convert all of the measurements if you are going to do the experiment correctly. These conversions can also help you when you are analyzing your results.