Case study
JCalc
A browser-based calculator suite for loans, ROI, percentages and business metrics, with formula explanations, examples and no signup required.
ProfessionalLive web product
Next.jsBrowser-based calculations
Overview
JCalc is a collection of accessible online calculators for everyday math, finance and business planning.
Features
- Fixed-rate loan payments, total interest and amortization.
- Return on investment and percentage calculations.
- Profit, pricing, break-even, cash flow and growth tools.
- Unit economics including customer acquisition cost and lifetime value.
- Formula explanations, worked examples and FAQs.
Approach
Calculations run in the browser, without requiring an account or installation. The site uses Next.js and is designed for fast, clear results.