Unit & Aspect Ratio Calculator
POPULARConvert units (Length, Mass, Data Storage, Temp) and calculate responsive screen aspect ratios.
4.9
rating
330K users
Instant
All-in-one utility to fluidly convert between metric/imperial units, calculate 16:9, 4:3, 21:9 image/video aspect ratio dimensions, and compute percentages.
How to use
- 1 Select conversion category (Aspect Ratio, Unit Converter, or Percentage).
- 2 Enter input values (e.g. Width 1920 to calculate Height for 16:9).
- 3 Read instant live results with visual ratio preview box.
Features
- Live visual aspect ratio box display.
- Instant metric to imperial conversions (meters, feet, inches, lbs, kg, GB, TB).
- Percentage change and margin calculator.
Benefits
- Scale design canvases and video frames accurately.
- Eliminate math errors in sizing layouts.
Frequently asked questions
What are standard video aspect ratios?
16:9 is standard HD/4K video, 9:16 is TikTok/Reels vertical, and 21:9 is ultrawide cinematic.