Aspect ratio
Integer pixel dimensions are reduced by their greatest common divisor.
Design and media ↗THE SUMFIZZ LIBRARY
Design and media calculators
Explore 25 free tools for design and media. Find aspect ratio, image resize, print resolution and more. Each calculator explains its inputs and method, with examples you can try using your own numbers.
THE SUMFIZZ LIBRARY
What are we working out?
Image resize
Preserves aspect ratio using a target width; height rounds to the nearest pixel.
Design and media ↗Print resolution
Pixels per inch depends on print size.
Design and media ↗Screen pixel density
Assumes square pixels and uses the physical diagonal.
Design and media ↗Video file size
Decimal MB, excluding container overhead and bitrate variation.
Design and media ↗Video bitrate target
Reserves the entered audio bitrate.
Design and media ↗Audio file size
Linear PCM payload only, excluding file headers and metadata.
Design and media ↗Audio sample duration
Sample count is per channel; adding channels does not increase duration.
Design and media ↗Frame count and duration
Constant frame rate.
Design and media ↗Video timecode converter
Non-drop-frame integer-rate timecode only.
Design and media ↗Slow-motion speed
Assumes every captured frame is retained and played at the target constant rate.
Design and media ↗Timelapse planner
Counts captures at one interval through the event duration; no extra capture at time zero is included.
Design and media ↗Photo exposure equivalent
Assumes reciprocity and equal scene brightness.
Design and media ↗Depth of field
Thin-lens geometric approximation.
Design and media ↗Lens field of view
Rectilinear lens focused at infinity.
Design and media ↗Crop factor equivalent
Equivalent field of view only.
Design and media ↗Image bleed dimensions
Bleed extends beyond all four trim edges; printer marks and additional safe margins are separate.
Design and media ↗Poster tiling
Uses one fixed sheet orientation and equal overlap between adjacent sheets.
Design and media ↗Typography scale
Starts at the base size and multiplies by the scale ratio for each subsequent step.
Design and media ↗Line-height calculator
This is the combined line-box height; margins, padding and font-specific ink bounds are not included.
Design and media ↗Responsive clamp builder
Linear interpolation in viewport width, clamped at the chosen endpoints.
Design and media ↗Grid column widths
Container width includes outer margins.
Design and media ↗Colour contrast
WCAG relative-luminance contrast for opaque sRGB colours.
Design and media ↗Colour format converter
Converts opaque three- or six-digit HEX into sRGB channel values and HSL.
Design and media ↗BPM delay timing
Straight note values.
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