Conversion directory

Free unit converters

Convert CSS, weight, and length units with documented factors, configurable context where needed, and instant browser-based results.

Conversion group

Developer units

Every converter includes its calculation method, a worked example, practical limitations, and a pre-calculated reference table.

Convert pixels to REM instantly with an adjustable root font size, formula, CSS examples, and a practical PX-to-REM reference table.

Convert REM to pixels instantly using an adjustable root font size, with the exact formula, CSS examples, and a REM-to-PX table.

Convert pixels to EM with an adjustable element font size, an exact CSS formula, developer examples, and a PX-to-EM lookup table.

Convert EM to pixels using an adjustable element font size, with the calculation formula, CSS examples, and a useful EM-to-PX table.

Convert REM to EM accurately with adjustable root and element font sizes, plus the formula, CSS examples, and a conversion table.

Conversion group

Every converter includes its calculation method, a worked example, practical limitations, and a pre-calculated reference table.

Convert pounds to kilograms instantly with the exact conversion factor, worked example, rounding guidance, and LB-to-KG reference table.

Convert kilograms to pounds instantly using the exact international-pound definition, with examples and a KG-to-LB reference table.

Conversion group

Every converter includes its calculation method, a worked example, practical limitations, and a pre-calculated reference table.

Convert centimeters to inches instantly using the exact 2.54 cm-per-inch relationship, with examples and a CM-to-inches table.

Convert inches to centimeters instantly using the exact 2.54 conversion factor, with a worked example and inches-to-CM reference table.