Converters

A conversion is rarely the thing you set out to do. It interrupts something else: a recipe written in cups when your scales read grams, a bolt specified in inches when your drill index is metric, a drive sold in terabytes that your computer insists is 931 of something.

These tools exist for that interruption. They are built to be opened, used for fifteen seconds and closed, which is why the answer appears as you type and why the unit converter shows every unit in the family at once rather than only the one you asked for. The second-most-likely question is usually the one right underneath the first.

Accuracy here is not a detail. The conversion factors are taken from the agreements that define them rather than copied from another site: an inch is exactly 25.4 millimetres, a pound exactly 0.45359237 kilograms, a nautical mile exactly 1852 metres. Rounding those is how a converter goes quietly wrong, and a wrong answer from a tool like this gets trusted and repeated.

Everything runs on your own device. There is no rate limit, no service to be down, and nothing about what you are measuring reaches the network.