Compute fluid clamp() type scales that flex between viewport sizes — no breakpoints needed. Set 16→20px body that just works — local math, free, no signup.
Compute subnet masks, network/broadcast addresses, and usable host ranges from any CIDR. Plan a /24 office network correctly — local math, free, no signup.
Convert IPv4 addresses between dotted-decimal, hex, integer, and binary forms. Decode 2130706433 to 127.0.0.1 instantly — local math, free, no signup.
Compute CSS selector specificity (a,b,c scores) and settle override battles with math. Prove #id beats .class chains — local calculation, free, no signup.
Convert numbers between binary, octal, decimal, and hex with bitwise views. Read 0xFF as 255 instantly — local math, free, no signup.
Convert screen sizes between inches, cm, resolution, and aspect — compare displays honestly. Check a 27-inch 4K pixel density — free, local, no signup.
clamp(min, preferred, max) with a vw-based preferred value: 16px at 320px width growing to 20px at 1200px, fluid between, capped outside. One declaration replaces three media queries.
Derived from min/max sizes over min/max viewports — the tool computes the exact slope and intercept so endpoints hit precisely.
clamp() works in all modern browsers (2020+). Legacy fallbacks declare a static size first, then the clamp line.
No — math runs locally in your browser. Nothing leaves your device.
Screen Size Calculator
Convert screen sizes between inches, cm, resolution, and aspect — compare displays honestly. Check a 27-inch 4K pixel density — free, local, no signup.
Aspect Ratio Calculator
Get any image or screen's aspect ratio in reduced form with common-ratio matching — 16:9, 4:3, 1:1 and custom. Check a 1920×1080 screen reads 16:9 — free, runs locally.
Last updated October 2026