Image, video, print and display guides
Clear answers, exact calculations and decision-focused workflows. Choose a topic below, then use the linked calculator to apply it to your own dimensions.
Aspect ratio basics
What Is Aspect Ratio? A Practical Guide to Image and Video Shape
Understand aspect ratio, how width and height form a ratio, why it differs from resolution, and how to choose the right shape for images and video.
GuideHow to Find an Aspect Ratio from Width and Height
Find and simplify any aspect ratio from pixel dimensions, with worked examples, decimal ratios and guidance for non-standard sizes.
GuideHow to Change Aspect Ratio Without Ruining the Composition
Choose between crop, padding and reframing when changing an image or video aspect ratio, with a practical decision process.
GuideHow to Change Aspect Ratio Without Cropping
Keep every part of an image or video visible by adding canvas space, letterboxing or designing an adaptive background.
GuideAspect Ratio vs Resolution: What Each Number Actually Means
Learn the difference between aspect ratio and resolution and how both affect framing, sharpness, file size and export decisions.
GuidePortrait vs Landscape: Orientation, Ratios and When to Use Each
Compare portrait and landscape orientation for photos, documents, screens and social video, with practical composition guidance.
GuideCommon Aspect Ratios for Photos, Video, Screens and Social Media
A practical reference to common aspect ratios, their exact shapes and the situations where each format is normally useful.
Images and photos
What Is Image Resolution? Pixels, Dimensions and Detail Explained
Understand image resolution, pixel dimensions, megapixels and print density without confusing them with aspect ratio or file size.
GuideHow to Find an Image's Resolution and Aspect Ratio
Check image width, height, megapixels and aspect ratio, then interpret whether the file is large enough for screen or print use.
GuideHow to Resize an Image Without Losing Quality
Resize images cleanly by preserving aspect ratio, choosing an appropriate resampling method and avoiding unnecessary recompression.
GuideHow to Resize an Image Without Pixelation
Prevent blocky edges and soft detail by understanding source pixels, enlargement limits, resampling and final viewing size.
GuideStandard Photo Sizes: Print Dimensions, Ratios and Pixels
Compare common photo print sizes, their aspect ratios and pixel dimensions at 300 PPI before cropping or ordering prints.
Guide4×6 Photo Dimensions: Inches, Centimeters, Ratio and Pixels
Find the exact dimensions and 3:2 aspect ratio of a 4×6 photo, including pixels for 150, 240 and 300 PPI printing.
Guide5×7 Photo Dimensions: Ratio, Centimeters and Print Pixels
Check 5×7 photo dimensions, its 5:7 aspect ratio and the pixels required for common print densities.
Print and density
Image Resolution for Print: How Many Pixels Do You Need?
Calculate print resolution from inches and PPI, choose a realistic density and avoid unnecessary upscaling.
GuideDPI vs PPI: The Difference for Images, Screens and Printing
Understand DPI versus PPI, which value belongs in image calculations and why changing metadata alone does not add detail.
GuideWhat Is DPI? Printer Resolution Without the Common Myths
Learn what dots per inch means for printers, how it differs from image pixels and why a DPI metadata value alone does not change quality.
GuidePixels per Inch (PPI) Explained for Images, Prints and Screens
Learn what pixels per inch means, calculate PPI for images, prints and screens, and understand how PPI differs from printer DPI.
Video quality and delivery
Video Resolution Chart: SD, HD, Full HD, 2K, 4K and 8K
Compare common video resolutions, pixel counts, aspect ratios and practical uses without confusing consumer UHD and cinema formats.
Guide720p vs 1080p: Resolution, Pixel Count and File Size
Compare 1280×720 and 1920×1080 video, including pixel count, scaling, bandwidth and when each resolution makes sense.
Guide1080p vs 4K: Pixels, Viewing Distance and Real-World Tradeoffs
Compare Full HD and 4K UHD by pixel count, display conditions, editing load, bitrate and storage before choosing a format.
Guide2K vs 4K Resolution: Cinema Standards and Monitor Labels
Compare true DCI 2K and 4K with the looser 1440p and UHD marketing labels commonly used for monitors and video.
GuideHow to Calculate Video File Size from Bitrate and Duration
Estimate video storage from total bitrate and running time, with worked examples and the difference between decimal MB and binary MiB.
GuideHow to Reduce Video File Size Without Visible Quality Loss
Make video files smaller by choosing an efficient codec, sensible bitrate, resolution and audio settings while protecting visible detail.
Displays and monitors
Monitor Resolution Explained: Pixels, Scaling and Aspect Ratio
Understand monitor resolution, native pixels, operating-system scaling and how to choose a usable desktop setup.
GuideWhat Is My Monitor Resolution? Screen Pixels vs Browser Viewport
Understand the difference between physical screen resolution, operating-system scaling, device pixel ratio and browser viewport measurements.
GuideMonitor Resolution Chart: HD, QHD, 4K, Ultrawide and 5K
Compare common monitor resolutions by exact dimensions, pixel count and aspect ratio for productivity, design and gaming workflows.
Guide1080p vs 1440p: Pixel Count, Sharpness and GPU Load
Compare Full HD and QHD monitor resolutions by pixels, scaling, performance and practical screen-size considerations.
Guide1440p vs 4K: Resolution, Scaling and Performance Compared
Compare QHD and 4K UHD monitor resolutions by pixel count, desktop scaling, graphics load and suitable use cases.
GuideUltrawide Monitor Resolutions: 21:9, 32:9 and Exact Ratios
Compare common ultrawide monitor dimensions, exact aspect ratios, workspace and compatibility considerations.
How to use this library
Start with the question closest to your task. Each guide gives a direct answer, explains the tradeoffs, provides a reference table and links to the calculator that applies the math. For a known pixel size, use the resolution library; for a fixed shape, use the ratio library.