A small tool for
countless details.

Measurements show up everywhere: in a recipe, a drawing, a product specification or a calculation. ToConvert puts the conversion first, with the method close at hand.

The toolkit brings together 79 converters for everyday measurements, engineering, thermal properties, fluids, electricity, light, magnetism, radiation and digital data. English is the primary language.

Built around the calculation

Enter a value, choose two units and see the result. Swap the units, change display precision, copy a result or save a conversion in your browser. Category pages also show the input in every compatible unit, with CSV export.

Keep the context

US and Imperial measures, temperature changes and absolute readings, bits and bytes: the label matters. The notes next to the calculator explain conventions that can change an answer.

Read the calculation methodology for sources, limits and precision. Open the full converter directory to explore the tools.