Calculate simple interest on loans and deposits.
Working this out manually takes time and invites small mistakes. Simple Interest Calculator takes principal, rate, and time and gives an instant result you can recalculate with different values.
Simple interest is interest calculated only on the original amount (the principal), never on interest already earned. It is the easiest form of interest to compute and appears in short-term personal loans, some vehicle and gold loans, school-level maths and many informal lending arrangements.
SI = P × R × T ÷ 100, where P is the principal, R is the annual rate in per cent and T is the time in years. The total amount to be repaid is A = P + SI. If the time is in months, divide by 12; if in days, divide by 365.
₹20,000 at 9% for 3 years: SI = 20,000 × 9 × 3 ÷ 100 = ₹5,400, so the amount is ₹25,400. ₹50,000 at 12% for 8 months: T = 8 ÷ 12 = 0.667 years, SI = 50,000 × 12 × 0.667 ÷ 100 = ₹4,000.
These rearrangements are common in exam questions, and the calculator shows the main result so you can verify your own working.
With compound interest, each period's interest is added to the balance, so interest earns interest. On ₹10,000 at 10% for 3 years, simple interest is ₹3,000 while annual compounding gives ₹3,310. The gap widens with time and rate, which is why long investments favour compounding and short loans are often quoted in simple terms.
Savings in some post-office certificates, trade credit between businesses, bills and notes, penalties on delayed payments and many classroom problems rely on simple interest. If you lend money to a friend, writing down the amount, rate, period and repayment date avoids misunderstandings later.
Confirm whether the quoted rate is per year or per month. A rate of 2% per month is 24% per year, which is very different from 2% per year. Also confirm the day-count convention if the agreement runs for part of a year. This calculator runs in your browser and does not store the figures you enter.
Calculate simple interest on loans and deposits. Simple Interest Calculator makes it easy to compare two or three scenarios side by side, needs no formulas or spreadsheet setup, and replaces manual arithmetic with an instant, repeatable answer.
Enter principal, rate, and time, then press the calculate button, and finally read the result and try other numbers to compare.
Before making a decision you try Simple Interest Calculator with two different sets of numbers and compare the answers.
The answer is only as good as the numbers you enter, so double-check units and decimals. Use the result as a guide and confirm important figures with an official or professional source.
Simple Interest Calculator works inside your browser, so what you type or select here is not sent to our server for processing.
People often find this page while searching for “saadharan byaaj”, “simple interest kaise nikale”, “si calculator”, “byaaj kaise nikale”, and “interest calculator in hindi”. Whatever the exact wording, the need is usually the same: a quick, reliable result without extra software.
It is a calculator that takes your input on this page and gives you an instant result you can recalculate with different values.
You will work with principal, rate, and time.
Yes, if you want a quick answer without installing anything. Searches like this usually come from someone with exactly that need, and the fields on this page are built for it.
It can be. Check the fields on this page and the result it gives; if they match what you are trying to do, you are in the right place.
No. This tool runs inside your browser, so what you type or select is not sent to our server for processing.
Yes. The page adapts to phone, tablet and computer screens, so you can use it wherever is convenient.
It follows the standard formula for the values you enter, but treat it as an estimate. Rules and rates differ between institutions, so confirm important figures with the official source.
You might also try Compound Interest Calculator, Loan Calculator, and Car Loan EMI Calculator.
Calculate compound interest with different frequencies.
Calculate total loan cost, EMI and interest payable.
Calculate car loan EMI, total interest and the real cost of your car with down payment and processing fee.
Calculate education loan EMI including interest during study and grace period, and compare paying interest early or later.
Calculate fixed deposit maturity amount and interest with quarterly, monthly, half-yearly or yearly compounding.
See how monthly extra payments or a one-time lumpsum reduce your home loan interest and tenure.
