Compound Interest Calculator

How to use it

1. {'step': 1, 'description': 'Convert annual rate to periodic rate', 'calculation': '6.5% ÷ 12 = 0.5417% per month'}
2. {'step': 2, 'description': 'Calculate total compounding periods', 'calculation': '15 years × 12 = 180 months'}
3. {'step': 3, 'description': 'Apply compound interest formula', 'calculation': '€5,000 × (1 + 0.065/12)^(12×15) = €13,233.52'}
4. {'step': 4, 'description': 'Calculate total interest earned', 'calculation': '€13,233.52 - €5,000 = €8,233.52'}

Common mistakes

• ⚠️ Using simple interest instead of compound interest for long-term projections
• ⚠️ Forgetting that more frequent compounding increas is returns slightly
• ⚠️ Not accounting for inflation eroding purchasing power over time

Worked example

Calculate 10,000 EUR at 5% for 10 years.

Your capital_final of {capital_final} shows the future value after {years} years. the multiplicador of {multiplicador}x shows how many times your money grew.

Input guide