Simple Interest Calculator

Total Interest
Principal amount

Principal amount

Total Interest

Total Value

When you invest money in a scheme that offers you a certain rate of interest periodically, you earn interest over your investment. Similarly, when you take a loan, you have to pay interest at a certain rate. In either case, there is an extra amount in the form of interest that is coming with the principal amount. The interest is calculated on the principal amount. It is important to ascertain the interest that you will gain (in case of investment) or you will have to pay (in case of a borrowed loan) beforehand. The simple interest calculator helps you to calculate the interest on the principal amount easily so that you can plan your finances properly.

What is Simple Interest?

Simple interest is a method of calculating the interest you earn or owe on a loan or investment. It’s called “simple” because it’s calculated on the initial principal amount only, without taking into account any interest that has accrued over time.

For example, let’s say you borrow Rs 1,000 from a friend for a year, with a simple interest rate of 5%. At the end of the year, you would owe your friend Rs 1,050 (Rs 1,000 + Rs 50 in interest).

Simple Interest Formula

To calculate Total Maturity Amount Value:

The simple interest formula for the calculator which is utilized to compute the overall gains accumulated is represented as:

A = P(1 + rt)


A represents the Total accumulated Amount (principal + interest)
P represents the Principal Amount
r represents the Rate of Interest per year in decimal; r = R/100
t represents the Time Period (months or years)

To calculate the Interest on the Investments and loans

SI= P X RX T/100

In it, the variables represent the following –

SISimple Interest
RRate of interest

CashZeni Simple Interest calculator uses this formula to help easily determine interest rates and gauge the increase in the value of the initial investment. Let’s understand it with the help of an instance.

Mr. A has invested an amount of Rs. 15000 at an interest rate of 5% for almost 2 years. So his SI will be calculated as Rs. (15000 X 5 X 2/100) which is equal to Rs.16500.

How to Calculate Simple Interest using Calculator?

For individuals who are confused regarding the gains that they will accumulate once the maturity period is over, a simple interest EMI calculator is the only option.  Just enter the principal, rate and time value and the result will be calculated within seconds. 

What is a Simple Interest Rate Calculator?

Simple interest calculator India is an online tool that helps you to calculate simple interest easily. It comes with an easy-to-use interface where you can enter a few details to get the simple interest. It requires three inputs:

  • Principal amount: Amount invested/borrowed on which the interest will incur
  • Rate of interest: The interest rate applied on the principal amount
  • Time period: Time period of investment

Based on the given inputs, the simple interest calculator online will use the rate of interest formula and show you the following:

  • Total interest earned: Total amount of interest earned throughout the investment period
  • Total amount: Final value of the investment including the principal amount and interest earned

You can use CashZeni simple interest calculator to get a quick idea of how much interest you have to pay on a loan on how much interest you will receive on an investment. 

Uses of Simple Interest Calculator

The simple interest formula comes in handy in a number of cases when we have to calculate the interest amount on the principal based on a fixed interest rate.

  • Fixed interest rate investment schemes: Suppose you have invested in a fixed income scheme such as a fixed deposit, RD, SGB, SSY, etc., you will earn interest based on a fixed interest rate. You can calculate the maturity amount from your investment using a simple interest calculator easily.
  • Loan repayment: The simple interest calculator also helps you to calculate the EMI amount on your loan. This helps you to ascertain the repayment beforehand so that you can customize your loan plan effectively.
  • Earning interest through lending: Suppose you have lent money to anyone and are charging a fixed interest rate on the lent amount. In that case as well, you can use a simple interest calculator and know how much you would be earning from the borrower.

How can Simple Interest Calculator help you?

It is regarded as the best computing device to determine the value of money gain over the tenure of investment. Users will know how much interest they will earn. Its simplified nature and accuracy have increased the demand for a simple interest rate calculator recently. The principal amount is constant when calculating a simple interest rate. This indicates the fact that interest is levied on principal remains the same for the consecutive tenure.

  • This simple interest calculator offers you output by calculating both principals as well as interest.
  • Although it is easy to calculate simple interest for shorter tenors but for long consecutive years, a manual mechanism increases the chances of mistakes. So, use an online simple interest calculator for accurate calculation.
  • Quick and easy way to gain insight into interest as well as the increase in the invested capital.

Benefits of Using Simple Interest Calculator

Simple interest calculator helps you to find the simple interest easily and quickly. Here are the main benefits of using a simple interest calculator:

  • The simple interest calculator helps you to calculate the interest earned or paid on a particular amount of principal during a specific time period. 
  • You can seamlessly adjust or modify the inputs and get results accordingly. This will help you to compare different combinations and plan your finances beforehand.
  • You can easily compare different fixed interest investment plans and choose the best one according to your financial goal.
  • Simple interest calculator saves you from doing complicated calculations. You can calculate everything effortlessly and within a few seconds.

Application of Simple Interest

The use of Simple Interest

Simple interest is a straightforward approach for computing interest on a principal amount, and it is widely employed by banks and other institutions. Here are some examples of how simple interest is applied:

Bank Loans

Individuals borrow money from banks in the form of loans, and banks apply simple interest on these loans, which borrowers must pay annually. The interest rate remains fixed for the duration of the loan, and it is a specific percentage of the principal amount that borrowers are required to pay. The amount of interest payable depends on the principal amount, interest rate, and the loan’s repayment period.

Car Loans

Car loans are typically paid in monthly installments, and the simple interest charged on these loans is not constant throughout the loan period. As borrowers pay the EMI, the amount gets deducted from the principal amount, and the interest is calculated based on the remaining balance of the principal amount. Therefore, the principal and interest rates decrease simultaneously in this type of loan.

Consumer Loans

Many stores offer expensive electronic appliances and other objects on simple interest, with the loan period lasting up to one year.

To conclude, a simple interest calculator can help investors and borrowers to calculate their interest easily. It is an online tool that can be accessed from anywhere. Just by entering a few details, you can easily ascertain the total interest amount on the principal and final value of the maturity amount. By using the simple interest calculator, you can compare different investment instruments, different types of loans, etc., and can make the right choice.

Frequently Asked Questions

What is a simple interest calculator?

A simple interest calculator is an online tool designed to compute the interest accrued on loans or savings based on the principal amount, interest rate, and time period.

How does a simple interest calculator work?

A simple interest calculator utilizes a predetermined formula to calculate the interest based on the inputs provided by the user. It performs the necessary calculations and displays the accurate results.

What are the benefits of using a simple interest calculator?

Using a simple interest calculator offers several advantages, including instant results, time savings, ease of use, accuracy, and the ability to compare interest rates from different lenders.

Are simple interest calculators reliable?

Yes, simple interest calculators are reliable as long as accurate inputs are provided. However, it’s always a good practice to double-check the results manually to ensure accuracy.

How does a simple interest calculator work?

A simple interest calculator uses the formula I = P x R x T, where I is the interest earned or paid, P is the principal amount, R is the interest rate, and T is the time period. The calculator takes these inputs and calculates the interest for you.

Can I use a simple interest calculator to compare different loans or investments?

Yes, you can use a simple interest calculator to compare different loans or investments by inputting the values for each option and comparing the interest earned or paid.

Do simple interest calculators consider compounding?

No, simple interest calculators only consider the straightforward calculation of interest on the principal amount. They do not take into account compounding, which is relevant for compound interest calculations.