Loan Payment Calculator

Build equal-payment or equal-principal loan schedules in your browser with LocalKit. Estimate repayments locally—amounts stay on-device with nothing uploaded.

Interactive controls load with JavaScript. Processing stays in your browser—nothing is uploaded.

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How to use

  1. Open the tool — Open this LocalKit page and wait for the interactive controls to load.
  2. Provide input — Paste or type your content (or set options). Data stays in the browser.
  3. Run the action — Use the primary button or live controls to generate the result.
  4. Copy the result — Copy the output into your editor, terminal, or documents.

Limits

Requires JavaScript. Extremely large inputs may slow the browser tab. Results depend on your browser APIs; there is no server-side processing quota because nothing is uploaded.

When to use

When you want a quick, free utility without creating an account or sending content to an online converter.

When not to use

When you need server-side integration, batch automation at scale, or certified compliance tooling.

Privacy note

Tool inputs are processed in your browser only. Theme, language and favorites may use localStorage; hosting may keep standard access logs (IP, UA, URL) without tool payloads.

FAQ（5）

Equal payment vs equal principal?

Equal payment keeps the monthly amount fixed; equal principal reduces interest faster with a falling payment.

Is the rate nominal annual?

Enter the advertised annual rate; the tool divides by 12 for monthly periods.

Are taxes and insurance included?

No — principal and interest only.

Can I model early repayment?

Not in this version; use fewer years as a rough proxy.

Is my loan data uploaded?

Never. Inputs stay on your device.