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Simple Interest Calculator

Simple Interest & Maturity Calculator

Calculate simple interest earnings on deposits, promissory notes, and loans with flexible day, month, and year durations and compound comparisons.

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Verified Mathematical Formulas

Investment / Loan Inputs

$10,000.00
6.5%
Total Simple Interest Earned
$1,950.00
Final Maturity Value: $11,950.00
Per Year
$650.00
Per Month
$54.17
Per Day
$1.78
Compound Interest Comparison

With annual compounding, you would earn $2,079.50 (an extra $129.50 in compound growth!).

Visual Financial Breakdown

Maturity$11.9k
Principal
$10,000.0083.7%
Simple Interest
$1,950.0016.3%

Frequently Asked Questions

Get answers to common borrowing, interest calculation, and repayment questions.

Simple interest is calculated solely on the original principal amount, without compounding. The formula is Simple Interest (I) = P × r × t, where P is the principal amount, r is the annual interest rate as a decimal, and t is the time duration in years.

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