Interest Calculator

Calculate simple & compound interest

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Principal ($)

Rate (%)

Years

Compounding

Simple Interest

$17,000.00

+$7,000

Compound Interest

$20,096.61

+$10,096.61

Compound advantage

+$3,096.61

Year-by-Year

YearSimpleCompound

1$10,700$10,723

2$11,400$11,498

3$12,100$12,329

4$12,800$13,221

5$13,500$14,176

6$14,200$15,201

7$14,900$16,300

8$15,600$17,478

9$16,300$18,742

10$17,000$20,097

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Full guide

How Simple and Compound Interest Work

Learn simple vs compound interest, the P(1+r/n)^(nt) formula, compounding frequencies, growth charts, and when to use each — free online.

Read the guide

About Interest Calculator

An interest calculator that computes both simple interest (P×R×T) and compound interest (P×(1+r/n)^(nt)). Supports different compounding frequencies (daily, monthly, quarterly, annually), shows year-by-year growth, and compares simple vs compound interest visually. All calculations are client-side. Essential for financial planning, savings analysis, loan comparison, and investment projections.

Interest Calculator Features

Simple & compound
4 frequencies
Year-by-year
Growth comparison
Total interest

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