Interest Calculator

About This Free Interest Calculator Online

This free interest calculator online or loan interest calculator online lets you calculate both simple and compound interest across any period. It's ideal for personal finance, loan planning, investment tracking, and educational use — all with a clean, mobile-friendly interface.

Features

• Calculate simple or compound interest
• Supports daily, monthly, and yearly compounding
• Instant result display
• Clean, mobile-responsive layout
• No registration or downloads

Common Uses

• Estimating interest earned on savings or deposits
• Calculating loan interest over time
• Comparing investment returns
• Educational math exercises

How to Use

1. Choose Simple or Compound Interest.
2. Enter principal amount, rate, time, and frequency.
3. Click "Calculate" to get interest and total amount.