Calculators

Some file-related questions are really just math problems — how many gigabytes is this in terabytes, what's the correct proportional height for a resized image, what date does this timestamp actually represent. Calculators groups together the tools built to answer those questions instantly, without needing a general-purpose calculator app or a manual conversion formula scribbled on paper.

The File Size Converter handles the most common of these calculations, converting between bytes, kilobytes, megabytes, gigabytes, and terabytes — useful for comparing storage plans, upload limits, or download sizes that are quoted in different units, especially since some providers use binary (1024-based) units while others advertise decimal (1000-based) ones, which can make quoted sizes look inconsistent at a glance.

The Aspect Ratio Calculator solves a specific and frequently annoying problem: when resizing an image or video, entering only a new width (or height) and getting the correctly proportional other dimension back, so the result doesn't end up stretched or squashed. It also shows the simplified ratio (like 16:9) for the original dimensions, which is useful when matching a specific screen size, video format, or print aspect ratio, and it works identically whether you're planning a resize for a photo, a video export, or a UI mockup.

The Timestamp Converter rounds out the category, translating Unix timestamps — the number of seconds since January 1, 1970 that databases and APIs commonly use internally — into human-readable dates and back again. This comes up often when debugging an API response, reading raw log data, or checking exactly when a record was created in a system that stores dates as a single number rather than a formatted string.

All three calculators run their math directly in your browser and update instantly as you type, with no server round-trip required for what is, after all, just arithmetic.