Unit Converter
Dev‑friendly conversions: px↔rem, HEX/RGB/HSL, bytes↔MB/GB/TB, time zones, durations, and more—built for pragmatic productivity.
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Start Converting Units
Work across typography, colors, storage, time, and more
Typography: px ↔ rem/em
Color: HEX ↔ RGB ↔ HSL
Bytes: B ↔ KB ↔ MB ↔ GB ↔ TB
Temperature: °C ↔ °F ↔ K
Length: mm ↔ cm ↔ in ↔ pt
Angle: degrees ↔ radians
Duration: ms ↔ s ↔ min ↔ h
Bandwidth: bps ↔ kbps ↔ Mbps ↔ Gbps
Time Zones
How to Use Unit Converter
- 1
Choose a Conversion
Pick from developer‑friendly groups: typography (px↔rem), colors (HEX/RGB/HSL), bytes, time zones, durations, angles, and more.
Tip:You can use multiple panels independently—no page reloads needed. - 2
Enter Values and Options
Provide inputs like base font size for px↔rem or select byte units. Values convert instantly and show results across related units.
Tip:For colors, adjust any format—others stay in sync automatically. - 3
Validate Results
Scan rounded and full‑precision values. Numeric ranges are clamped where appropriate (e.g., RGB channels).
Tip:Use copy shortcuts in your OS to paste results into code. - 4
Apply in Your Workflow
Drop the output into CSS, design tokens, README tables, or API documentation without context switching.
Tip:Save typical bases (e.g., 16px) to standardize conversions across projects.
Security & Privacy
- All conversions happen in your browser; no data is uploaded.
- No inputs are logged or stored.
- Results are computed instantly with no network calls.
Features & Benefits
Developer‑Centric Sets
Typography, colors, bytes, time zones, durations, angles, and more—suited to real workflows.
Bidirectional Sync
Change any color or unit and see related formats update immediately.
Precision & Clamping
Reasonable rounding and safe ranges for predictable results in code.
Copy‑Ready Outputs
Results formatted for direct paste into CSS, JS, or docs.
Local‑Only Processing
Everything runs in your browser—nothing leaves your device.
Fast & Lightweight
Instant feedback without heavy libraries or network calls.
Frequently Asked Questions
Is any data sent to servers?
No. All conversions occur locally in your browser. Nothing is uploaded or logged.
Which color formats are supported?
HEX, RGB, and HSL with bidirectional syncing and a live swatch preview.
Do you support custom base font sizes?
Yes. Set a base (e.g., 16px) and convert px↔rem/em accurately for your project.
How accurate are byte conversions?
Bytes use base‑2 (×1024) conversions for KB/MB/GB/TB/PB to match developer expectations.
Can I convert between time zones?
Yes. Provide an ISO date/time and IANA time zone names to view converted results.
Any performance or size limits?
The tool is lightweight and instantaneous for typical inputs—perfect for daily development.
Technical Specifications
Use Cases & Applications
Design System Tokens
Convert colors, spacing, and typography units while defining tokens.
Responsive CSS
Translate pixel values to rems/em for accessible, scalable UIs.
Storage & Bandwidth
Compare payload sizes across KB/MB/GB and network speeds.
Time & Scheduling
Convert times between IANA time zones for releases or cron notes.
Data Sheets & Docs
Copy precise tables into READMEs and technical documentation.
Math & Utilities
Quick deg↔rad and duration conversions during code reviews.