Easily calculate proportional dimensions, find missing width or height, and scale images or videos without distortion, cropping, or quality loss.
Input your original dimensions or choose a popular preset ratio (like 16:9 widescreen or 9:16 vertical) to compute the proportional width and height instantly.
Resize visuals or find exact dimensions in four simple steps:
Enter the current pixel width (W1) and height (H1) of your image, screen, or video file.
Pick a standard preset (e.g., 16:9 YouTube, 9:16 Reels/TikTok, 1:1 Square) or lock your custom ratio.
Type in your new target width (W2) or target height (H2) to see the matching proportional measurement.
View the calculated missing dimension along with the simplified ratio and decimal multiplier instantly.
Aspect ratio describes the proportional relationship between width and height. Cross-multiplication ensures visuals scale without stretching.
nitial width measured in pixels (px), inches, or centimeters.
Initial height representing the vertical dimension of the asset.
The simplified ratio of width to height reduced using the Greatest Common Divisor (GCD).
The newly projected width or height maintaining identical proportions.
Practical examples of scaling multimedia content for modern social media, web, and display platforms.
Upscaling a standard 1920 × 1080 (16:9) YouTube video project to a target 4K width of 3840 px.
Given: W1=1920, H1=1080, Target W2=3840
Calculation:Ratio Multiplier = 1080÷1920=0.5625New Height (H2) = 3840×0.5625=2160 px
Answer: Scaled dimensions are 3840 × 2160 px (16:9)
Creating an Instagram Reel or TikTok video with a target height of 1920 px using a standard 9:16 ratio..
Given: Ratio = 9:16, Target H2=1920 px
Calculation:New Width (W2) = 1920×(9÷16)=1920×0.5625=1080 px
Answer: Required resolution is 1080 × 1920 px (9:16)
Resizing a high-res camera photo to an Instagram portrait standard with a fixed width of 1080 px..
Given: Ratio = 4:5, Target W2=1080 px
Calculation:New Height (H2) = 1080×(5÷4)=1080×1.25=1350 px
Answer: Target dimensions are 1080 × 1350 px (4:5)
Clear answers on common video ratios, image distortion prevention, and platform specs.
An aspect ratio is the proportional relationship between the width and height of an image, video, or display screen. Maintaining the proper aspect ratio ensures media renders clearly across devices without becoming stretched, squeezed, or cropped.
16:9: Standard landscape widescreen for YouTube, TV displays, and desktop monitors.9:16: Full-screen vertical video for TikTok, Instagram Reels, and YouTube Shorts.1:1: Square format for Instagram feeds and profile avatars.4:5: Vertical portrait format for high-engagement Instagram feed posts.
Black bars occur when the aspect ratio of the video content does not match the native aspect ratio of the viewing screen. Horizontal black bars (letterboxing) appear when widescreen video plays on a taller screen, while vertical black bars (pillarboxing) appear when narrow video plays on a wide display.
Always calculate the new height by multiplying the new width by the ratio of (H1÷W1). Alternatively, use CalcNova's Aspect Ratio Calculator to enter your new target dimension; the calculator computes the matching measurement with zero distortion.
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