Compoundly Interest Calculator

Compoundly is a powerful, easy-to-use compound interest calculator designed to help you understand how your money grows over time.

Whether you're planning your savings, estimating investment returns, or setting a financial goal - Compoundly gives you clear answers with beautiful charts and detailed breakdowns.

COMPOUND INTEREST CALCULATOR
Enter your initial amount, annual interest rate, investment period, and monthly contributions to instantly see how your money compounds. Toggle between monthly and yearly compounding frequencies to compare results.

GOAL MODE
Have a target amount in mind? Goal Mode calculates exactly how much you need to contribute each month to reach your financial goal within your desired timeframe.

DETAILED RESULTS & CHARTS
View interactive growth charts that visualize your investment over time. See a complete period-by-period breakdown showing your balance, interest earned, and total contributions at each stage.

SAVE & COMPARE
Save unlimited calculations (Pro) and compare them side by side. Perfect for evaluating different investment scenarios — change one variable and see how it impacts your long-term returns.

ADVANCED PARAMETERS
Factor in real-world conditions:
- Tax rate on interest earned
- Inflation rate with inflation-adjusted results
- Monthly and yearly compounding options
- Custom default values for quick calculations

EXPORT & SHARE
Export your calculations as professional PDF reports or CSV files. Share results with your financial advisor, family, or friends.

MULTI-CURRENCY & MULTI-LANGUAGE
10 currencies: USD, EUR, GBP, PLN, JPY, KRW, CNY, INR, RUB, BRL
12 languages: English, Polish, Spanish, French, German, Portuguese, Italian, Japanese, Korean, Chinese, Hindi, Russian

PRIVACY FIRST
All your data stays on your device. No account required. No data collected. No tracking. Your financial calculations are yours alone.

PRO PLAN (one-time purchase)
Remove all ads, unlock unlimited saves, PDF export, and full comparison features with a single purchase. No subscriptions.

Download Compoundly today and take control of your financial future.

Recent changes:
Welcome to Compoundly!

- Compound interest calculator with real-time results
- Goal Mode: calculate required monthly contributions
- Interactive growth charts (monthly & yearly views)
- Save, compare, and export calculations (CSV & PDF)
- Tax rate and inflation adjustments
- 10 currencies and 12 languages
- GDPR-compliant ad consent
- Pro plan: remove ads and unlock all features