Digital Calculators
Practical tools for image and video proportions, file sizes, download times and data transfer.
Download Time Calculator
Estimate file download time from size and internet speed.
Open calculator →DigitalData Transfer Calculator
Calculate theoretical data transferred from speed and time.
Open calculator →DigitalFile Size Calculator
Convert file sizes between bytes, KB, MB, GB and TB.
Open calculator →DigitalVideo File Size Calculator
Calculate video file size from bitrate and duration or find the bitrate needed for a target file size.
Open calculator →DigitalAudio File Size Calculator
Estimate PCM, WAV and compressed audio file size, data rate and recording duration from audio settings.
Open calculator →DigitalAspect Ratio Calculator
Resize images and video while preserving the correct proportions.
Open calculator →DigitalPPI Calculator
Calculate pixels per inch, pixel pitch, megapixels, aspect ratio and physical screen dimensions.
Open calculator →DigitalPrint Size Calculator
Convert image pixels and PPI into print dimensions or calculate pixels needed for a target print size.
Open calculator →DigitalScreen Size Calculator
Calculate physical screen width, height, diagonal, area and perimeter from display size and aspect ratio.
Open calculator →Helpful Guides
Go beyond the calculator with practical explanations, formulas and worked examples.
Download Speed and Download Time Explained
Learn how internet speed, file size, Mbps and MB/s affect download time, with formulas and practical examples.
DigitalFile Size Explained: KB, MB, GB and TB
Understand KB, MB, GB and TB, how digital file-size units relate, and the difference between decimal and binary measurements.
DigitalData Transfer Time Explained: Size, Speed and Bandwidth
Learn how to estimate data transfer time from file size and transfer speed, including bits, bytes and real-world throughput.
Digital size, ratio and transfer calculations
Digital calculators cover image and video proportions, file sizes, network transfer volume and download duration. They are useful when different units or data-rate conventions make a simple comparison harder to do mentally.
Choosing the right calculator
Use the Aspect Ratio Calculator for width and height proportions, File Size Calculator for decimal storage-unit conversions, Download Time Calculator when you know a file size and connection speed, and Data Transfer Calculator when you know the speed and duration instead.
- Keep bits and bytes separate when working with network speeds.
- Check whether a source uses decimal GB/MB or binary GiB/MiB units.
- Treat network calculations as theoretical unless you enter measured throughput.