HepsiHesapla — 149+ Turkish Calculators, One Design System
Neo-brutalist design meets programmatic scale: 149 calculators, 18 categories, one coherent brand
The Brief
- Goal
- Build the definitive Turkish-language calculator hub — a tool for every calculation a Turkish internet user might need, from mortgage payments to BMI to VAT.
- Audience
- Turkish-speaking users across all demographics.
- Niche
- Turkish-language utility calculators — underserved relative to English equivalents.
The Approach
Programmatic content at scale: 149 calculators across 18 categories — finance, health, math, science, cooking, and more.
Design system: JetBrains Mono typeface, black/white/cream palette, zero border-radius — a neo-brutalist aesthetic in a sea of generic Turkish utility sites.
Monetization: AdSense initially; planned pivot to SaaS — an embedded calculator API for Turkish business websites.
Tech Stack
- Frontend
- Next.js App Router
- Hosting
- Vercel
- Styling
- Tailwind CSS + JetBrains Mono
- Monetization
- Google AdSense (current), SaaS API (planned)
- SEO
- Turkish-language structured data, local schema
The Build
Most Turkish utility sites suffer from poor UX, heavy ad loads, and no consistent visual identity. HepsiHesapla was designed to be immediately distinctive: JetBrains Mono throughout, a stark black/white/cream palette, and zero rounded corners. The neo-brutalist aesthetic is a deliberate market signal — this is a tool built by someone who cares about craft, not another WordPress clone assembled from stock themes.
The 149-calculator scale strategy relies on long-tail Turkish search intent. Each calculator targets a specific query — kira artış hesaplama, vücut kitle indeksi hesaplama, KDV hesaplama — that individually may receive modest traffic but in aggregate builds meaningful organic reach. The key architectural decision was ensuring every calculator page carried its own structured data and canonical URL from day one, not as a retrofit.
Designing for distinctiveness paid off in engagement metrics. Lower bounce rates and longer session times compared to typical Turkish utility sites validated the bet that users respond to a site that looks intentional. Return visit rates were notably higher than benchmark — users remember a stark, memorable design in a way they don't remember generic blue-and-white utility pages.
The AdSense revenue covers operating costs but has a clear ceiling. The planned pivot to a calculator embedding API — letting Turkish SMBs add professionally designed calculators to their own sites for a monthly fee — would unlock a SaaS revenue model. The challenge is that designing an API into a content site retroactively is significantly harder than building for it from the start.
Screenshots
Results
What I'd Do Differently
"I'd have launched the SaaS plan from day one. Retroactively adding an API to a content site is harder than designing for it initially."
"18 categories was too many at launch. Dominating 3 categories with perfect calculators would have built authority faster than spreading thin across all 18."
See it live
Explore 149+ Turkish-language calculators with neo-brutalist design, or browse the full portfolio.