PX to REM Cheat Sheet - Common Pixel Values
Common CSS pixel values at a 16px root, ready to convert or memorize.
Developer Tools & CSS Calculators
Daily Calcs Dev Tools are free browser calculators for CSS, accessibility, and networking. Pick a tool below for live previews, copy-ready output, and crawlable formulas - no account required.
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Which tool should I use?
Match your situation to the canonical tool - each calculator focuses on one workflow so you get copy-ready output without extra steps.
| Your situation | Recommended tool |
|---|---|
| I need to convert px to rem | PX to REM Converter |
| I need to check WCAG color contrast | Color Contrast Checker |
| I need a single fluid clamp() value | CSS Clamp Calculator |
| I need a full responsive type scale | Fluid Typography Calculator |
| I need auto-fit CSS Grid code | CSS Grid Generator |
| I need IP subnet / CIDR math | IP Subnet Calculator |
CSS & Visual Design
Convert units, check contrast, generate clamp() and type scales, build CSS grids, and score selector specificity - with live previews you can copy into your stylesheet.
PX to REM Converter
Convert CSS pixels to rem units from a custom root size.
Color Contrast Checker
Check WCAG AA/AAA contrast ratios with live swatches for text and UI colors.
CSS Clamp Calculator
Generate rem-safe fluid clamp() values with a live viewport preview.
Fluid Typography Calculator
Build a full responsive type scale and export CSS variables or Tailwind tokens.
CSS Grid Generator
Generate auto-fit minmax() grid CSS with a live wrapping card preview.
CSS Specificity Calculator
Score any CSS selector as (a,b,c) and compare which rule wins.
Type Scale Calculator
Generate a modular font-size scale in px and rem with copy-ready CSS.
Precision & Networking
Calculate IP subnet ranges, masks, and usable hosts for network planning without leaving the browser.
Converters & Utilities
Convert aspect ratios, Unix timestamps, number bases, chmod permissions, and estimate file transfer times.
Aspect Ratio Calculator
Resize width and height while locking common video and image ratios.
Chmod Calculator
Convert file permissions between octal and symbolic chmod notation.
Unix Timestamp Converter
Convert Unix epoch seconds or milliseconds to human-readable dates.
Binary Hex Decimal Converter
Convert between binary, octal, decimal, and hexadecimal with bit grouping.
Download Time Calculator
Estimate download or upload time from file size and connection speed.
Frequently Asked Questions
What developer tools does Daily Calcs offer?
The Dev Tools hub covers CSS unit conversion, fluid typography clamp() generators, color contrast checking, CSS grid generation, selector specificity scoring, IP subnet math, chmod permissions, Unix timestamps, number bases, aspect ratios, and download-time estimates. Every tool runs in the browser with no sign-up.
Are these Dev Tools free to use?
Yes. All Daily Calcs developer calculators are free, ungated, and usable anonymously. Results appear instantly so you can copy CSS or networking values into your project without creating an account.
CSS clamp calculator vs fluid typography calculator: which should I use?
Use the CSS Clamp Calculator when you need a single rem-safe clamp() value with a live viewport preview. Use the Fluid Typography Calculator when you need a full multi-step type scale exported as CSS variables or Tailwind tokens. Both keep preferred values rem-based so browser zoom stays accessible.
Do these tools replace browser DevTools?
No. These pages calculate and generate values you paste into CSS or configs. Browser DevTools still inspect live pages. Use Daily Calcs to plan tokens and formulas, then verify in Chrome or Firefox DevTools.
Where should I start for accessible CSS typography?
Start with the PX to REM Converter for root-relative units, then the Color Contrast Checker for WCAG AA/AAA pairs, then the CSS Clamp Calculator for fluid sizes that keep a rem term in the preferred value so text zoom still works.
Related Guides
Source-checked explainers that pair with the CSS and utility tools above.