Video Resolution Calculator
Calculate standard video resolutions (720p, 1080p, 4K).
Video Resolution & Bitrate File Size Calculator
About Video Resolution Calculator
The Video Resolution & Aspect Ratio Calculator computes exact width and height pixel dimensions for standard video aspect ratios (16:9 Landscape, 9:16 Vertical Short/Reel, 4:3 Classic, 1:1 Square, 21:9 Ultrawide). Input any target width, height, or aspect ratio to calculate proportional scaling dimensions and bitrate recommendations instantly.
How to Use Video Resolution Calculator
Step 1
Select a preset aspect ratio (16:9, 9:16, 4:3, 1:1, 21:9) or enter custom ratio values.
Step 2
Enter either known Width (px) or known Height (px).
Step 3
View the auto-calculated dimension, total megapixel count, and aspect ratio decimal.
Step 4
Click "Copy Resolution" to use in your video editing software (Premiere, Final Cut, DaVinci Resolve).
Practical Use Cases for Video Resolution Calculator
YouTube, TikTok & Instagram Reel Formatting
Calculate exact 1080p, 4K, or 9:16 vertical resolution dimensions (1080x1920, 2160x3840) for video editing software presets.
Video Encoding & Responsive Web Embedding
Calculate 16:9 aspect ratio padded dimensions for responsive HTML5 video players without black bar letterboxing.
Input & Output Examples
Calculating 16:9 Scaling for Width 1440px
Known Width: 1440px, Target Aspect Ratio: 16:9
Calculated Height: 810px (1440 x 810 px • 1.777:1 Aspect Ratio)
Key Features & Performance
- ✓Supports standard video ratios: 16:9 (HD/4K), 9:16 (Vertical/TikTok), 4:3 (Legacy), 1:1 (Square), 21:9 (Ultrawide Cinema).
- ✓Calculates missing Dimension (Width -> Height or Height -> Width) using exact proportional math.
- ✓Includes standard resolution presets (720p, 1080p Full HD, 1440p 2K, 2160p 4K UHD, 4320p 8K).
- ✓Visual aspect ratio preview box with live scaling.
- ✓1-Click Copy calculated resolution string (e.g. 1920x1080).
- ✓100% Client-Side calculation.
Key Terminology & Definitions
Aspect Ratio
The proportional relationship between a video frame width and height, expressed as two numbers separated by a colon (e.g. 16:9).
Letterboxing & Pillarboxing
Black bars added to the top/bottom (letterboxing) or sides (pillarboxing) of a video when displayed on a screen with a different aspect ratio.