Snapcalc
Fast, no-signup hub of everyday calculators — age, EMI, SIP, GPA, and more.
Why I Built 15 Separate Calculators Instead of One
The obvious approach is a single calculator page with a dropdown: pick "EMI," pick "GPA," pick "BMI." I did the opposite — every calculator gets its own dedicated page and URL.
That's an SEO decision as much as a UX one. Someone searching "SIP calculator" wants a page about SIP calculators — its own title tag, its own meta description, content that actually answers that specific query — not a generic "calculators" homepage with the tool buried three clicks deep in a dropdown.
Built on Next.js, the real engineering problem wasn't the arithmetic (most of these are a handful of formulas) — it was structuring the codebase so that calculator #16 is a copy-adjust-ship exercise, not a mini-redesign. Shared layout, shared input components, calculator-specific logic isolated per page.