ExactUnits
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66 categories · 788 units

All unit converters

Everything here shares one engine and one guarantee: conversion factors are stored as exact fractions and rounded only when displayed.

Browse by dimension

Common converters

Engineering

Heat & thermodynamics

Fluids

Electricity

Magnetism

Light & optics

Radiology

Chemistry & other

Settings

Theme

System follows your operating system and changes with it.

Text size
High contrast

Maximises text and border contrast and removes the grid background.

Graph-paper background
Round to
Notation
Thousands separators
Decimal mark
Nearest fraction

Shows the result as the nearest tape-measure fraction, with the error it costs.

Accessibility & interaction
Reduce motion Stops interface animations even when the operating system does not.
Underline links Keeps links visually distinct without relying on colour.
Larger touch targets Makes buttons and form controls easier to tap.
Shorter reading lines Limits article width for easier scanning.
Monochrome display Removes colour as an information cue.
Always-visible focus Makes the keyboard focus ring persistent and stronger.
Verbose screen-reader results Announces the complete conversion equation.
Sticky action bars Keeps converter and calculator actions within reach.
Select values on focus Replaces a value immediately when you start typing.
Left-handed mobile layout Moves key mobile actions toward the left thumb.
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