Pounds to kg converter

About This Tool

This tool provides a fast pounds-to-kilograms converter for mass values used in science, kitchen, logistics, and travel. Enter a weight in pounds (lb, lbs) and receive an exact kilogram equivalent with standard precision.
Conceptually, the tool uses the internationally defined conversion factor: 1 lb = 0.45359237 kg. It accepts integers and decimals, enforces non-negative inputs, and returns results with five-decimal precision by default, adjustable by downstream usage.
Audience includes students learning unit math, engineers integrating imperial and metric data, and travelers who need quick cross-system weight checks. It reduces arithmetic errors by providing a single source of truth for lb→kg conversions, which supports budgeting, packing, and measurement audits in multi-region contexts.
Core features include precise one-step conversion, support for common unit aliases (lb, lbs), robust input validation, clear numeric output, and reliable behavior in cross-system scenarios. Use cases span recipe scaling, luggage weight checks for airlines, shipping weight estimates, and educational exercises.

Sign in to see all your usage