Weight Converter Online

Kilograms, pounds, grams, ounces, stone — weight gets measured differently across countries and contexts. Cooking recipes, shipping labels, medical records, and gym equipment all use different units. This tool converts between them instantly.

How it works

Enter a value, pick the source unit, and the tool calculates equivalents in all other units using standard conversion constants. Everything runs in your browser.

How to use it

1. Enter your weight value
2. Select the source unit from the dropdown
3. Read all converted values — click any to copy

Supported units

Milligrams (mg), grams (g), kilograms (kg), metric tonnes (t), ounces (oz), pounds (lb), stone (st), US short tons, and Imperial long tons.

A few things worth knowing

• Pounds and ounces: 1 lb = 16 oz exactly. For body weight in the US, pounds is standard; in the UK, stone and pounds are still commonly used (1 stone = 14 lb)
• Tonnes vs tons: Metric tonne = 1,000 kg. US short ton = 2,000 lb ≈ 907 kg. Imperial long ton = 2,240 lb ≈ 1,016 kg. These are three different units — the spelling matters
• Grams for cooking: Most European recipes use grams. A kitchen scale in grams is more accurate than cups for baking, where small variations in flour can change the result

FAQ

How many pounds is 1 kilogram? 1 kg = 2.20462 lb.

How many grams are in an ounce? 1 oz = 28.3495 g.

What is a stone in kilograms? 1 stone = 6.35029 kg (14 lb).

Related Tools

• Unit Converter
• Volume Converter