AspectCalc: Aspect Ratio & DPI

AspectCalc is a focused dimension toolkit for photographers, designers, video editors and anyone who works with images. Detect a ratio from any pixel size, solve a missing dimension, scale one size or build a full output set.

Compare common target ratios by the visual area lost to cropping or fitting. Pick the least waste option, choose one of nine focal anchors, and copy the exact crop origin and output dimensions. Print tools convert between pixels, inches and centimetres at any density and show a clear quality rating.

What You Can Do

• Detect and simplify a ratio from any whole pixel dimensions
• Solve a missing width or height from any ratio
• Use quick formats such as 16:9, 4:5, 1:1 and 2.39:1
• Scale a size by percentage while preserving its ratio
• Build and copy a batch set of output sizes
• Prepare six format delivery sets with exact source crops and final output pixels
• Rank common targets by the least crop or fit waste
• Place a crop using nine focal anchors
• Plan exact safe rectangles with independent horizontal and vertical margins
• Check megapixels, estimated memory, and a chosen pixel limit before export
• Calculate print dimensions and effective pixel density
• Plan print bleed, trim, safe areas and full canvas pixels
• Fit a source into an exact destination with fill crop, fit padding and scale
• Plan exact grid cells from a canvas, margins, rows, columns and gutters
• Create exact 1x, 2x and 3x image asset sets from one logical size
• Save reusable ratios and calculation history
• View personal usage insights
• Export PDF spec sheets, CSV data and a validated local backup

Free and Pro

Ratio solving, detection and single size scaling are available free. AspectCalc Pro unlocks ratio comparison, crop and fit planning, focal anchors, batch size sets, print tools and professional exports. Choose monthly, yearly or one time Lifetime access in the app. No account is required.

Private by Design

Saved ratios, calculations and backups remain under your control on your device or in a file location you choose. AspectCalc includes no advertising, analytics or tracking.

AspectCalc Pro is offered as a monthly subscription, a yearly subscription, or a one time Lifetime purchase. The current price is shown in the app before you buy, and prices can change at any time and vary by country. Pro subscriptions renew automatically until cancelled. Payment is charged to your Apple Account at confirmation. Cancel anytime in Settings > Apple Account > Subscriptions; cancellation applies at the end of the current period. Terms: Apple Standard EULA https://www.apple.com/legal/internet-services/itunes/dev/stdeula/