Tech Calculators

How long a file takes to download at your connection speed — with the megabits-vs-megabytes conversion done correctly.

Convert KB, MB, GB and TB — in both decimal (1000) and binary (1024) systems — and see why a 1 TB drive shows ~931 GiB.

Calculate a display’s pixels per inch, total megapixels and dot pitch from its resolution and diagonal size.

Simplify any width and height to its aspect ratio, and scale it to a new width without distortion.

Convert any hex color code — #aabbcc or shorthand #abc — to its red, green and blue values and a ready-to-paste rgb() string.

Turn red, green and blue values (0–255) into a hex color code and a CSS rgb() string.

Estimate a random password’s entropy in bits and how long an offline attack would take to crack it — from length and character set only.

Convert a Unix timestamp to a human-readable UTC date and time — with automatic detection of millisecond timestamps.

Estimate a video file’s size from its bitrate and duration, with size comparisons for common quality presets.