Unit Converter

How to use the Unit Converter

1. Select the measurement category — length, area, volume, weight, temperature, pressure, or speed.
2. Choose the units to convert from and to.
3. Enter the value you want to convert.
4. Read the converted result instantly.

Why use this tool

• Covers all the unit conversions builders encounter daily — metres to feet, litres to gallons, kg to stone.
• Works offline once loaded, so you can use it on site without a signal.
• Handles less common conversions like pressure (bar to PSI) and temperature (Celsius to Fahrenheit).

UK construction still uses a mix of metric and imperial measurements. Timber is sold in metric lengths but old plans show feet and inches. Plumbing fittings come in both metric and BSP imperial sizes. This converter handles all the common conversions and some less obvious ones that catch people out. It is faster than searching online each time, and it works without an internet connection once the page has loaded. Keep it bookmarked for quick access on site. Preserve enough decimal places for the task and only round the final result; repeated early rounding can create a noticeable quantity error across a large area or volume. A unit conversion also does not make two nominal product sizes interchangeable, so confirm actual manufacturer dimensions before ordering fittings or materials.

Part of Builder Tools Utilities — free construction tools for UK tradespeople.