Simple Interest Calculator - Calculate Simple Interest (Principal + Interest) Online (2024)

FAQs

How do you calculate simple interest from principal? ›

How to Calculate Simple Interest? Simple Interest is calculated using the following formula: SI = P × R × T, where P = Principal, R = Rate of Interest, and T = Time period. Here, the rate is given in percentage (r%) is written as r/100.

The formula to determine simple interest is an easy one. Just multiply the loan's principal amount by the annual interest rate by the term of the loan in years. This type of interest usually applies to automobile loans or short-term loans, although some mortgages use this calculation method.

Calculate simple interest by using the formula I = Prt. In this formula, “I” equals the interest amount, “P” equals principal (the starting balance), “r” equals the interest rate and “t” equals the number of time periods.

Key Takeaways

To calculate simple interest, multiply the principal by the interest rate and then multiply by the loan term. Divide the principal by the months in the loan term to get your monthly principal payment on a simple interest loan.

We can rearrange the interest formula, I = PRT to calculate the principal amount. The new, rearranged formula would be P = I / (RT), which is principal amount equals interest divided by interest rate times the amount of time.

Divide your interest rate by the number of payments you'll make that year. If you have a 6 percent interest rate and you make monthly payments, you would divide 0.06 by 12 to get 0.005. Multiply that number by your remaining loan balance to find out how much you'll pay in interest that month.

Step 1: Convert your annual interest rate to a monthly rate by dividing by 12. Step 2: Multiply your loan amount by your monthly interest rate to get your monthly interest payment. Step 3:To calculate your monthly principal payment, subtract your monthly interest payment from your total monthly payment.

Simple interest is calculated by multiplying the principal, the amount of money that is initially invested or borrowed, by the rate, the speed at which the interest grows, and the time, how long money is being invested or borrowed. In other words, the formula for simple interest is I = P R T .

How do you calculate the interest earned on each simple interest account? ›

The formula for calculating simple interest is: Interest = P * R * T. P = Principal amount (the beginning balance). R = Interest rate (usually per year, expressed as a decimal). T = Number of time periods (generally one-year time periods).

Use this simple interest calculator to find A, the Final Investment Value, using the simple interest formula: A = P(1 + rt) where P is the Principal amount of money to be invested at an Interest Rate R% per period for t Number of Time Periods. Where r is in decimal form; r=R/100; r and t are in the same units of time.

The formula for calculating simple interest for half-yearly periods is: Interest = Principal × Rate × Time 2 × 100. Here's how you can calculate simple interest for half-yearly periods: Determine the principal amount, the interest rate, and the time period in half-years.

Figure out your monthly interest due by dividing your interest rate by 12. For example, an 8% interest rate loan would be . 007 (. 08 divided by 12).

Simple interest is calculated only on the initial principal amount. It remains constant throughout the investment or loan term. The formula is I = P * r * t, where I is the interest, P is the principal amount, r is the annual interest rate, and t is the time in years.