Interest Calculator
Calculation Details
Interest Calculator
An Interest Calculator is an online financial tool that helps you calculate how much interest can be earned on a principal amount over a specific period of time. It can be useful for savings, investments, deposits, loans, and other financial calculations.
This Interest Calculator supports both simple interest and compound interest. You can enter the principal amount, annual interest rate, and time period to calculate the estimated interest and final amount.
What is Simple Interest?
Simple interest is calculated only on the original principal amount. Previously earned interest is not added to the principal for future interest calculations.
The simple interest formula is:
I = P × R × T
- I = Interest
- P = Principal amount
- R = Annual interest rate in decimal form
- T = Time in years
What is Compound Interest?
Compound interest is calculated on the original principal plus previously accumulated interest. Because interest is added back to the principal, compound interest can grow faster over time.
The compound interest formula is:
A = P(1 + r/n)nt
- A = Final amount
- P = Principal amount
- r = Annual interest rate in decimal form
- n = Number of compounding periods per year
- t = Time in years
How to Use This Interest Calculator
- Select Simple Interest or Compound Interest.
- Select your preferred currency.
- Enter the principal amount.
- Enter the annual interest rate.
- Enter the time period in years.
- If using compound interest, select the compounding frequency.
- Click the Calculate Interest button.
Simple Interest Example
Suppose you invest 10,000 at an annual interest rate of 5% for 3 years using simple interest.
Interest = 10,000 × 0.05 × 3 = 1,500
Therefore, the total amount would be 11,500.
Compound Interest Example
Suppose you invest 10,000 at an annual interest rate of 5% for 3 years and the interest is compounded annually. The calculator applies the compound interest formula to determine the estimated interest earned and final amount.