I Just Shipped Speed & Area Converters — Unit Converter Category Now Has 6 Tools on EveryTool

#webdev #buildinpublic #javascript #nextjs

Two more tools just went live on EveryTool — and the Unit Converter category is officially starting to look like a real toolkit.

💨 Speed Converter

Units supported: km/h, mph, m/s, knots, and Mach

Whether you're doing physics calculations, planning a road trip, checking aircraft speeds, or just satisfying curiosity — type a value in any field and every other unit updates instantly. No "convert" button. No page reload.

Use cases devs actually hit: calculating API rate limits in requests/second, benchmarking data throughput in MB/s, or cross-referencing network speeds.

📐 Area Converter

Units supported: sq meters, sq feet, sq km, sq miles, acres, hectares

Real estate, architecture, GIS, agriculture, geography — area conversion is one of those things that comes up constantly and never has a clean tool. This one does.

Unit Converter category: now at 6 tools

Tool	Units
📏 Length	mm, cm, m, km, in, ft, yd, mi
🌡️ Temperature	Celsius, Fahrenheit, Kelvin
💾 Data Transfer	bits, bytes, KB, MB, GB, TB, Mbps, Gbps
⚖️ Weight & Mass	kg, g, lb, oz, tonne, stone
💨 Speed	km/h, mph, m/s, knots, Mach
📐 Area	sq m, sq ft, sq km, acres, hectares

The technical approach

Every converter on EveryTool follows the same architecture:

Next.js App Router with a Server Component wrapper and a "use client" Client Component for all interactive logic
No external conversion libraries — all math is native JS
Real-time updates via controlled React state — no debounce delays
force-static + revalidate: false — pages are fully static, zero server compute at runtime

The client-side-only rule is non-negotiable. No data hits a server, no usage tracking, no cookies.