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Aspect ratio, image and video tools

Choose from 17 browser-based tools by the answer you need: dimensions, crop loss, print size, video export estimates or responsive image code. No account is required. These tools calculate and plan; they do not edit your original files.

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Choose a task

Start with the result you need.

PIXEL-PERFECT SIZING

Integer Scaling Calculator

Find the largest whole-number scale, output resolution and centered borders for a target display.

Calculate integer scaling → MULTI-SCREEN WALLPAPERS

Multi-monitor Wallpaper Calculator

Combine monitor resolutions, preview layouts and calculate wallpaper canvas and crop coordinates.

Plan wallpaper size → RESPONSIVE WEB IMAGES

Responsive Image & srcset Generator

Generate srcset and sizes markup, plan proportional exports and check density targets.

Generate responsive HTML → WEB IMAGE DENSITY

Viewport & DPR Calculator

Check viewport size and device pixel ratio, then convert CSS and raster dimensions for web images.

Check viewport & DPR → ASPECT RATIO

Aspect Ratio Calculator

Find the simplified ratio, decimal value and matching dimensions from a width and height.

Open calculator → ASPECT RATIO

Aspect Ratio Converter

Compare an expanded canvas with the largest centered crop when changing a source to a new aspect ratio.

Convert dimensions → CROP & FRAMING

Crop Loss Calculator

See the exact crop dimensions, removed pixels and percentage of an image or video that will be lost.

Measure crop loss → PRINT & PIXEL DENSITY

Print Size & DPI Calculator

Convert pixels to print dimensions, find required resolution and compare fit or fill placement.

Calculate print size → PIXELS & MEGAPIXELS

Megapixel to Resolution Calculator

Convert MP and aspect ratio into pixel dimensions, or calculate exact megapixels from a resolution.

Convert MP and pixels → FIT WITHOUT CROPPING

Letterbox & Pillarbox Calculator

Calculate scaled content, black bar thickness and active frame area for any output size.

Calculate black bars → IMAGE

Image Aspect Ratio Calculator

Check the ratio and dimensions of an image locally without uploading the file.

Check an image → EXPORT SIZE & BITRATE

Video File Size Calculator

Estimate file size from bitrate and duration, or calculate a video bitrate budget for a size limit.

Estimate video size → PIXEL & DISPLAY SHAPE

Pixel Aspect Ratio Calculator

Calculate PAR, sample SAR, display aspect ratio and square-pixel export dimensions.

Calculate pixel aspect ratio → ANAMORPHIC VIDEO

Anamorphic Desqueeze Calculator

Calculate restored frame dimensions, lens squeeze ratios and an FFmpeg desqueeze command.

Calculate desqueeze → VIDEO

Video Aspect Ratio Calculator

Plan video dimensions for landscape, portrait, square and cinematic formats.

Calculate video size → SOCIAL MEDIA

Social Media Sizes

Filter reference sizes by platform and media type, check the named placement and copy its working dimensions.

Choose a social format → SOCIAL MEDIA

Social Media Safe Zone Checker

Preview Reels, Stories, TikTok and Shorts UI-safe areas, then download an editable overlay.

Check a social safe zone →

Which tool should I use?

If you know the width and height and want the ratio, use the aspect ratio calculator. If you know a ratio and one side, use its missing-dimension section. To compare adding canvas with cropping for a new ratio, use the fit and crop converter. To translate total pixel count into width and height, use the megapixel calculator. If a platform requires a different shape, compare the crop loss with a no-crop letterbox or pillarbox fit.

Follow a complete task

Work through a website card image, a landscape-to-vertical video, or three social-media compositions. Each route links the calculation to the edit and the final verification.

Need common dimensions?

Browse the ratio guides for shapes such as 16:9, 9:16, 1:1 and 4:5, or look up a specific size in the resolution guide directory.