DEV3 Loan and EMI Calculator — Source Code (React + Tailwind)

Source code of the DEV3 Loan and EMI Calculator, a loan calculator with a full amortisation schedule, extra-payment effects, a balance chart drawn in SVG and CSV export.

Download: buy a licence and the ZIP is waiting in Account → Downloads. Try it live: https://dev3.tech/tools/loan-emi-calculator shows the finished tool running.

What is in the download

• A standalone Vite + React + TypeScript + Tailwind CSS project: src/tool holds the tool, shared pieces sit beside it
• package.json with exact versions plus a lockfile, so npm ci works
• README.md (run, build, embed in Next.js or plain React) and an MIT LICENSE

What the code does

• EMI, total interest and repayment schedule
• Prepayment simulator showing interest and tenure saved
• Yearly roll-up table
• SVG balance chart with no chart library

Tech stack

React 19, TypeScript, Vite, Tailwind CSS 4.

Install and customise

The How to install and How to use tabs list the steps. In short: unzip, npm ci, npm run dev, then copy the tool folder into your own app if you want to embed it.

Good to know

• A browser-only tool: there is no backend or database in the code.
• Real lenders may round or charge fees differently; treat results as illustrations.