Interpolation Calculator
A free, browser-based interpolation calculator. Enter known data points and instantly get step-by-step results for linear, logarithmic, and double (bilinear) interpolation — all processed client-side, with no data leaving your browser.
Live site: interpcalc.com
Features
- Linear interpolation — straight-line estimate between two known points
- Logarithmic interpolation — for data that varies linearly with ln(x), e.g. pH, decibels, Richter magnitude
- Double (bilinear) interpolation — interpolates across a 2D grid using four corner values (e.g. steam tables)
- Full step-by-step working shown for every result, not just a final number
- Automatically flags results that fall outside the known data range as extrapolated
- Runs entirely in the browser — no sign-up, no server round-trip
- Multi-language support (English, Spanish, French, German, Portuguese, Italian, Japanese, Korean)
- SEO-optimized static pages (About, Privacy Policy, Terms, Contact, FAQ)
Tech Stack
Project Structure
/
├── public/ # favicons, robots.txt, static assets
├── src
│ ├── components/ # HomePage, InterpolationCalculator, Field, LegalPage, ErrorPage
│ ├── i18n/ # dictionary, language list, per-locale translations
│ ├── layouts/ # base page layout
│ ├── lib/
│ │ └── interpolation.ts # linear, logarithmic, and bilinear interpolation logic
│ ├── pages/ # index, about, contact, privacy, terms, 404/500
│ │ └── {de,es,fr,it,ja,ko,pt}/ # localized routes
│ └── styles/
└── wrangler.jsonc # Cloudflare deployment config
Commands
All commands are run from the root of the project, from a terminal:
| Command | Action |
|---|
npm install | Installs dependencies |
npm run dev | Starts local dev server at localhost:4321 |
npm run build | Build production site to ./dist/ |
npm run preview | Preview the build locally |
npm run deploy | Build and deploy to Cloudflare Workers |
