How accurate is the conversion?

Conversions use exact published ratios (e.g., 1 inch = 25.4 mm). Results are displayed to 6 significant digits.

Can I share a specific conversion?

Yes — copy the URL after entering a value. It encodes the source unit, target unit, and amount.

Which unit categories are supported?

Length, weight/mass, temperature, area, volume, speed, and energy. Each category includes both metric and imperial units.

How accurate are temperature conversions?

Exact. °C to °F uses F = (C × 9/5) + 32; Kelvin conversions use K = C + 273.15.

converters Free No signup

Unit Converter

Convert between metric and imperial units — length, weight, temperature, area, volume.

Loading tool…

About this tool

Universal unit converter covering length, weight, temperature, area, volume, speed, and energy. Bookmarkable: every conversion is encoded in the URL so you can share or save it.

How to use

1 Select the measurement category (length, weight, temperature, area, volume, speed, or energy).
2 Choose the source unit from the first dropdown.
3 Choose the target unit from the second dropdown.
4 Type a value — the converted result updates instantly. Copy the URL to share this conversion.

Frequently Asked Questions

Related tools

Percentage Calculator

Compute percentages, increases, decreases, tips, and percentage-of-total — six modes.

Timezone Converter

Convert times across cities — schedule meetings across timezones effortlessly.