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Many financial and government websites have compound interest calculators, such as Bankrate.com and Investor.gov. In addition, some mathematics-oriented websites also have compound interest calculators to illustrate particular uses of calculus in business, explains The Calculator Site.

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One formula for calculating yearly compound interest is M=P(1+i)n. "M" represents the final amount with the principal and interest combined, "P" represents the principal amount, "i" represents the interest rate, and "n" is the number of years invested.

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Compound interest in a savings account accelerates interest earnings by paying interest on the portion of the account balance made up of previously earned interest. Interest in a savings account accrues at a rate that varies among banks and may compound daily or monthly.

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Compound interest is a financial term used to describe the process where the interest earned on a principal investment over a set period of time is added to the principal amount. The interest payable for the following periods is recalculated on the sum of the original investment and the previous int

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The difference between simple interest and compound interest is that simple interest builds only on the principal amount, while compound interest builds on both the principal and previously earned interest. Because of this, compound interest always yields greater profits.

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To calculate interest, multiply the periodic interest rate by the principle amount. For example, if you borrowed $1000 with an interest rate of 10 percent, in a year your interest paid is $100.

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A simple interest calculator figures out the amount of interest that is earned and added to an initial investment amount. To calculate the interest amount, a person must provide the interest amount, interest rate and period of investment. The calculator does the math and displays the total amount of

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Most of the major high street banks offer savings accounts with some form of compound interest, with Barclay's, CIT bank and Ally some examples, according to The Simple Dollar. Most accounts have different features, meaning that some savings accounts may be better suited to individuals than others,

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To find a free simple interest calculator online, visit math, business software publisher or financial sites, such as WebMath, Money Chimp and Pine Grove Software. The online calculators found on these sites may have different features, such as also calculating future values and daily interest rates

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Real interest rate is calculated by adjusting for the effects of inflation when compared to the nominal interest rate. The calculation formula is simple, as it only requires subtracting the rate of inflation from the nominal interest rate. The value left after subtraction is the real interest rate.