Compound Interest Calculator

Tracking since Apr 1, 2026.

Changelog

• May 4, 2026
  description

  Main Features:
  ⭐ Initial Principal: The starting lump-sum investment  
  ⭐ Periodic Contribution: Amount to be added regularly  
  ⭐ Contribution Frequency: Choose "monthly" or "yearly" contribution  
  ⭐ Compounding Frequency: Choose "monthly compound" or "yearly compound"  
  ⭐ Annual Return Rate: Enter as a percentage (e.g. 2 means 2%)  
  ⭐ Investment Periods: Specify in "months" or "years" depending on contribution frequency
  
  The calculator instantly computes and displays: **Initial Principal, Total Contributions, Total Interest, Final Amount**.
  
  -------------------------
  
  Three Display Modes
  📝 Summary: Overview of initial principal, total contributions, total interest, and final amount  
  📊 Bar Chart: Visualize annual total contributions, interest, and final amount for trend comparisons  
  🖥️ Details Table: Year-by-year breakdown of contributions, interest, and final amount for copying or comparison  
  
  Switching views does not recalculate; any parameter change auto-updates all views instantly.
  
  -------------------------
  
  Usage Scenarios
  
  💰 Simulate results of monthly savings or regular investments over years  
  💰 Compare "monthly compounding" versus "yearly compounding" effects  
  💰 Assess the impact of different rates, contributions, or periods  
  💰 Quickly view yearly asset growth and interest ratios  
  
  -------------------------
  
  Privacy & Data
  
  😀 All calculations are performed locally on your device  
  😀 No data is collected or transmitted; works fully offline  
  
  Just click the toolbar icon to open the calculator and try compound interest conveniently, anytime.
  
  -------------------------
  Change Log
  
  1.0.1 Fixed Windows display issue (2026-03-12)
  1.1.0 Added English and Japanese support

  Main Features:
  ⭐ Initial Principal: The starting lump-sum investment  
  ⭐ Periodic Contribution: Amount to be added regularly  
  ⭐ Contribution Frequency: Choose "monthly" or "yearly" contribution  
  ⭐ Compounding Frequency: Choose "monthly compound" or "yearly compound"  
  ⭐ Annual Return Rate: Enter as a percentage (e.g. 2 means 2%)  
  ⭐ Investment Periods: Specify in "months" or "years" depending on contribution frequency
  
  The calculator instantly computes and displays: **Initial Principal, Total Contributions, Total Interest, Final Amount**.
  
  -------------------------
  
  Three Display Modes
  📝 Summary: Overview of initial principal, total contributions, total interest, and final amount  
  📊 Bar Chart: Visualize annual total contributions, interest, and final amount for trend comparisons  
  🖥️ Details Table: Year-by-year breakdown of contributions, interest, and final amount for copying or comparison  
  
  Switching views does not recalculate; any parameter change auto-updates all views instantly.
  
  -------------------------
  
  Usage Scenarios
  
  💰 Simulate results of monthly savings or regular investments over years  
  💰 Compare "monthly compounding" versus "yearly compounding" effects  
  💰 Assess the impact of different rates, contributions, or periods  
  💰 Quickly view yearly asset growth and interest ratios  
  
  -------------------------
  
  Privacy & Data
  
  😀 All calculations are performed locally on your device  
  😀 No data is collected or transmitted; works fully offline  
  
  Just click the toolbar icon to open the calculator and try compound interest conveniently, anytime.
  
  -------------------------
  Change Log
  
  1.2.0 Adjust "Contribution Amount" and "Annual Return Rate (%)" to allow negative values.
  1.1.0 Added English and Japanese support
  1.0.1 Fixed Windows display issue (2026-03-12)

Permissions & access

Permissions

None declared

Host access

None declared

Screenshots

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