Build your Loan & Mortgage Calculator with AI in under 5 minutes

Build a loan and mortgage calculator that finds the monthly payment, total interest, and full amortization schedule for any loan — adjust the amount, interest rate, and term with live sliders. Everything runs in the browser.

Hoe het werkt

Stap 1

Beschrijf je idee

Schrijf een prompt die beschrijft wat je wilt.

Stap 2

AI bouwt het

FloopFloop genereert productieklare code direct.

Stap 3

Deploy & ga live

Je project wordt gehost op een eigen subdomein in minuten.

Waarom bouwen met AI in plaats van een developer inhuren?

	FloopFloop	Traditionele developer
Tijd tot lancering	Minder dan 5 minuten	2-8 weken
Kosten	Vanaf €0	€5.000 - €50.000+
Onderhoud	Inbegrepen	Doorlopend contract

What is a loan & mortgage calculator?

A loan or mortgage calculator answers the question everyone asks before borrowing: what's the monthly payment, and how much will it cost in total? Give it the amount, the annual interest rate, and the term, and it works out the fixed monthly payment that amortizes the loan, the total interest paid over its life, and a month-by-month schedule of how each payment splits between interest and principal. It's one of the most-searched tools on the web because the stakes are real — a fraction of a percent on a 30-year mortgage is tens of thousands of dollars — and because the amortization math isn't something most people can do in their head. The canonical calculators (the ones on bank and real-estate sites) all share the same core; the useful ones let you drag the inputs to compare scenarios and show the full schedule, not just the headline number.

Common features

Monthly payment from amount, rate, and term
Total interest and total amount paid
A principal-vs-interest split bar
A full month-by-month amortization schedule
Live sliders for amount, rate, and term
Correct handling of a 0% interest rate
A final payment trued up to a zero balance
Works for mortgages, car loans, and personal loans
Everything client-side; inputs remembered
Light and dark themes

Real-world examples

Sizing a mortgage

A buyer drags the amount and rate to see that a $300,000 loan at 6.5% over 30 years is about $1,896 a month — and that they'll pay roughly as much again in interest.

Comparing a car loan term

Someone toggles a $30,000 car loan between 5 and 7 years and watches the monthly payment drop while the total interest climbs.

Reading the schedule

A borrower scrolls the amortization table to see exactly when their loan crosses over from mostly-interest to mostly-principal payments.

Why FloopFloop fits loan & mortgage calculator projects

A loan calculator is a high-trust tool people use to make big decisions, so it should be instant, ad-free, and yours. FloopFloop ships the calculator you want — principal-and-interest, or the full mortgage with taxes and insurance, in your currency — on your own domain, with all the math running in the browser and nothing uploaded. The calm 'ledger' that ships by default puts the payment front and centre with the full schedule beneath, and the whole thing is one prompt away from being whatever fits your need.

Probeer deze prompts

Kopieer een prompt en plak deze in FloopFloop om te beginnen.

Build a loan and mortgage calculator. Sliders and number fields for the loan amount, annual interest rate, and term in years. Show the monthly payment as the headline figure, plus total interest, total paid, and the principal — with a bar that splits principal vs interest. Below that, a full month-by-month amortization schedule (payment, principal, interest, remaining balance) in a scrollable table. Use the standard amortization formula, handle the 0%-interest case, and true up the final payment so the balance ends exactly at zero. Format money with a fixed locale so it's deterministic and hydration-safe, and remember the inputs in localStorage. 100% client-side.

Create a mortgage calculator like the ones on bank sites: enter the loan amount, rate, and years, and see the monthly payment and how much interest you'll pay over the life of the loan. Keep it in the browser.

Build a car-loan / personal-loan calculator with a monthly payment figure and an amortization table, and a dark theme.

Build a loan calculator with sliders so I can drag the amount and rate and watch the monthly payment and total interest update instantly.

Veelgestelde vragen

How is the monthly payment calculated?

With the standard amortization formula: the payment is the amount that pays off the principal plus interest in equal instalments over the term. At a 0% rate it's simply the principal divided by the number of months. The calculator also builds the full schedule, trueing up the last payment so the balance lands exactly on zero.

What's an amortization schedule?

A month-by-month breakdown of each payment into interest and principal, plus the remaining balance. Early payments are mostly interest (on the large balance); later ones are mostly principal. Seeing it laid out is why people are often surprised how much total interest a long mortgage costs.

Does it work for any loan, not just mortgages?

Yes — the same math applies to car loans, personal loans, and student loans. Set the amount, rate, and term to match and you get the payment and schedule for any fixed-rate amortizing loan.

Does it include taxes, insurance, and fees?

By default it calculates principal and interest only — the core of the payment. Property tax, insurance, PMI, and fees vary a lot, so they're left out for clarity; ask FloopFloop to add the fields you need and they're one refinement away.

Is anything sent to a server?

No. Every calculation runs in your browser and your last inputs are saved to localStorage only. The single outbound surface is the /api/health probe.

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