Eigener Einheiten-Umrechner (Selbst erstellen)

So funktioniert die Berechnung

Every line in the box defines one unit as name=value_in_base, meaning how many base units fit inside it. Conversion runs through that base in two steps: base = value × from_factor, then result = base ÷ to_factor, which is algebraically value × (from ÷ to). The starting list makes the metre the base at 1, with foot=0.3048, inch=0.0254, yard=0.9144, furlong=201.168 and league=4828.032. Both dropdowns rebuild from your text as you type, and the table shows the value in every defined unit at once.

Assign 1 to whichever unit you want as the reference; every other factor is then that unit's size in base units. Values accept scientific notation, so 1e-9 parses fine, but they must be positive and finite, and any line whose value is zero, negative or non-numeric is dropped from the list without a warning. Lines beginning with # are treated as comments. Save units stores the whole textarea in your browser, Clear empties both the box and the stored copy, and each table row carries its own delete button.

This is a pure scale converter: one multiplication, no offset. Temperature cannot be expressed, because Celsius to Fahrenheit needs an added 32 that the format has no room for, and neither can derived units such as m/s or kg·m. Nothing checks dimensions either, so define kilogram and furlong in one list and it will convert between them without complaint. Definitions live in this browser only, and the row delete button matches lines starting exactly with name=.

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