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Loans & Amortization · Loan Basics

Existing Loan Calculator

Find the current balance and remaining interest on a loan you are already paying.

  • Free to use here · embed on the Free plan
  • 4 inputs · 5 results
  • English & Spanish

Try the Existing Loan Calculator

See your current balance and what is left — results update as you type.

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Estimates only — not a loan offer or financial advice.

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What this calculator does

What the Existing Loan calculator works out

The Existing Loan Calculator is a free, embeddable calculator from CalcFunnel. Find the current balance and remaining interest on a loan you are already paying.

You enter 4 inputs: original loan amount, interest rate (%), original term (years) and payments already made (months).

It returns current balance, monthly payment, payments remaining, principal paid so far and interest remaining.

Built for lenders, credit unions and borrowers. Embedding it on your own website is included on the Free plan (free forever for up to 5 calculators on one domain), as part of the Loans & Amortization category.

Results it shows

  1. 01Current Balance
  2. 02Monthly Payment
  3. 03Payments Remaining
  4. 04Principal Paid So Far
  5. 05Interest Remaining

The first figure — current balance — is the headline result.

Inputs

The inputs it uses

Each field below comes straight from the calculator, with the same help text visitors see when they hover the info icon.

Original Loan Details

Original Loan Amount
The amount you originally borrowed when the loan began.
Interest Rate (%)
The annual interest rate on the loan.
Original Term (years)
The full repayment term of the loan when it was first taken out.

Payment Progress

Payments Already Made (months)
How many monthly payments you have made so far. The remaining balance is calculated as of this point.

For your website

Embed this calculator on your website

Put the Existing Loan Calculator on your own site with your colors, copy and lead form. Every calculation can arrive in your CRM with the numbers attached.

Works on WordPress, Wix, Squarespace, Webflow, Shopify, GoHighLevel and plain HTML — paste one line into an HTML or code block. No plugin needed.

Start free How embedding works

Free plan, no card. 14-day trial on Pro & Business.

  1. Inline on any pagePaste the snippet where the calculator should appear. It fills the width of its container and resizes to fit its content.
  2. Popup buttonA button sits on your page; visitors click it and the calculator opens in a popup.
  3. Floating corner widgetPaste once — or in your site-wide footer code — to show a floating calculator bubble in the corner of every page.
  4. Open from your own link or buttonGive any existing link, button or image a class and it opens the calculator when clicked.
  5. Direct linkA full-page link to the calculator for emails, social posts, QR codes or a menu item.

FAQ

Existing Loan calculator FAQs

Still stuck? Ask the team — we reply within one business day.

Q.01What does the Existing Loan Calculator calculate?
Find the current balance and remaining interest on a loan you are already paying. It returns current balance, monthly payment, payments remaining, principal paid so far and interest remaining.
Q.02What information do I need to use the Existing Loan Calculator?
You enter 4 inputs: original loan amount, interest rate (%), original term (years) and payments already made (months). Every input starts with a sensible default, so you can change only what you know.
Q.03What does “Original Loan Amount” mean in the Existing Loan Calculator?
The amount you originally borrowed when the loan began.
Q.04What does “Interest Rate (%)” mean in the Existing Loan Calculator?
The annual interest rate on the loan.
Q.05Is the Existing Loan Calculator free to use?
Yes — you can use it on this page for free, without an account. Embedding it on your own website is included on the Free plan (free forever for up to 5 calculators on one domain), as part of the Loans & Amortization category. Compare plans.
Q.06Can I embed the Existing Loan Calculator on my website?
Yes. Embed it inline, as a popup button, as a floating corner widget, from your own link or button, or share a direct link. It works on WordPress, Wix, Squarespace, Webflow, Shopify, GoHighLevel and plain HTML sites with one line of code — see embedding.
Q.07Is the Existing Loan Calculator available in Spanish?
Yes. Labels, tooltips and result names are available in English and Spanish, and visitors can switch language in the calculator.
Q.08Can the calculator capture leads?
Yes. It can end with a lead form, a Get a Quote form, a Share panel or a button to any URL. Leads are saved with the inputs and results attached and can be forwarded to your CRM by webhook.
Q.09Are the Existing Loan results financial advice?
No. Estimates only. Assumes on-time payments at the original rate and term with no fees or extra payments. Check your statement for the exact balance.

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The Existing Loan Calculator is one of 188 calculators you can brand and embed with one line of code.

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  • 14-day trial on Pro & Business
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