Weight Converter

Weight converter: grams, kilograms, pounds, and more

This converter relates eight mass units across metric and imperial systems: milligrams, grams, kilograms, metric tons, ounces, pounds, stones, and US tons. Whether you are weighing ingredients, parcels, or yourself, enter a mass in one row and the others are derived from it. The exact factors and the contexts where each unit is standard follow below.

The key conversion factors

• 1 kg = 1,000 g = 2.20462 lb
• 1 lb = 0.45359237 kg = 16 oz
• 1 oz = 28.3495 g
• 1 stone = 14 lb = 6.35029 kg
• 1 metric ton = 1,000 kg = 2,204.62 lb
• 1 US (short) ton = 2,000 lb = 907.185 kg

Because the pound is defined as exactly 0.45359237 kg, every conversion between metric and imperial mass here is precise rather than rounded.

Everyday kg-to-lb conversions

The most-requested swap is kilograms to pounds. Multiply by 2.2 for a quick estimate or 2.20462 for accuracy. A 5 kg bag of flour is about 11 lb; an 80 kg person weighs about 176 lb. For the reverse, halve the pounds and subtract about 10% — 150 lb is roughly 68 kg.

Body weight: kg, lb, and stones

Body weight is reported differently around the world. Most countries use kilograms; the US uses pounds; the UK and Ireland use stones and pounds. To read a UK weight, multiply stones by 14 and add the loose pounds to get total pounds, then convert. This three-way split is the single biggest source of confusion in fitness and medical contexts.

Cooking and small weights

Recipes and nutrition use grams and ounces. Remember 1 oz = 28.35 g and 1 lb = 453.6 g. Because 1 mL of water weighs about 1 g, metric weighing is precise and repeatable for baking — convert an ounce-based recipe to grams and a kitchen scale will give far more consistent results than measuring by volume.

Shipping and heavy loads

Freight and bulk materials use tons, but "ton" is ambiguous. A metric ton (tonne) is 1,000 kg, a US short ton is 907 kg, and a UK long ton is 1,016 kg. Always confirm which is meant on a shipping document — the 10% gap between metric and short tons adds up fast on a loaded truck.

Related converters

• Volume Converter — convert liquid measures alongside ingredient weights.
• BMI Calculator — uses weight and height to screen body mass index.
• Length Converter — pair with weight for shipping dimensions and dimensional weight.