Compound Interest Calculator
CALCCalculate compound interest with different compounding frequencies.
Enter values and click Calculate
📖 How to Use Compound Interest Calculator
1
Enter principal amount
The initial sum you are investing or depositing.
2
Set annual interest rate
Enter the yearly return rate as a percentage.
3
Choose compounding frequency
Select daily, monthly, quarterly, or annually — more frequent compounding grows money faster.
4
Set the time period
Enter number of years to calculate growth.
💡 Examples
Long-term growth
INPUT
$1,000 · 7% · annually · 30 years→
OUTPUT
Final: $7,612 · Interest earned: $6,612Savings account
INPUT
$5,000 · 5% · monthly · 10 years→
OUTPUT
Final: $8,235 · Interest: $3,235🚀 Pro Tips
✓The "Rule of 72" — divide 72 by your interest rate to estimate how many years to double your money (e.g. 72 ÷ 7% ≈ 10 years).
✓Starting 10 years earlier can double or triple your final balance due to compounding.
✓Daily compounding earns slightly more than monthly, but the difference matters most on large sums.
✓Compounding works against you with debt — high-interest credit cards compound daily.