Weight Converter

Convert Weight Online — Free Weight Converter

Switch between milligrams, grams, kilograms, metric tonnes, ounces, pounds, and stone instantly. Enter a value, choose your units, and read the answer — with the same weight shown in every other unit alongside it.

How to Convert Weights

Type the amount, pick the unit you're starting from and the unit you want, and the converted value appears straight away with the full equation beneath it, for example 1 kg = 2.2046 lb. The swap button reverses the two units, and the table below lists the same weight in all seven units so you can compare them at a glance.

Handy Weight Conversions

One pound is exactly 0.45359237 kilograms, so one kilogram is about 2.2046 pounds. One ounce is about 28.35 grams, and one stone is 14 pounds — roughly 6.35 kilograms. In practice that means 150 lb is about 68.04 kg, 70 kg is about 154.32 lb, and 10 stone is about 63.5 kg. The ounces and pounds here are the standard avoirdupois units used for everyday weighing, not troy ounces for precious metals or fluid ounces for liquids. The tonne is the metric tonne of 1,000 kilograms, not the US short ton or the UK long ton.

Good Uses for This Tool

Converting body weight between kilograms, pounds, and stone, scaling recipes between grams and ounces, checking luggage and parcel limits, reading nutrition labels and product specs written in another system, and handling shipping and lab measurements.

Is It Actually Private?

Yes. Every conversion happens in your browser — the values you enter are never sent to a server or stored.