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ToolBoxGenie

Weight Converter

Converters · Added 9 August 2026

Convert mass between metric and imperial units, including the stones-and-pounds format still used for body weight in the UK and Ireland.

Result

1 kg in pound

2.20462262 lb

1 kg = 2.20462262 lb

The same value in every unit

Milligram (mg)
1,000,000
Gram (g)
1,000
Kilogram (kg)
1
Tonne (metric) (t)
0.001
Ounce (oz)
35.2739619
Pound (lb)
2.20462262
Stone (st)
0.157473044
Ton (US short) (sh tn)
0.00110231131
Ton (UK long) (lg tn)
0.000984206528

Ounces and pounds here are avoirdupois — the everyday kind. Troy ounces, used for precious metals, are heavier and are not interchangeable with these.

How to use the weight converter

  1. 1Enter the weight you want to convert in the Value box.
  2. 2Choose the unit it is currently in, then the unit you want it in.
  3. 3The result appears immediately, followed by the same weight expressed in every unit — useful when a recipe gives grams and your scale reads ounces.
  4. 4Press Swap units to flip the direction, or Reset to start again from kilograms and pounds.

Examples

Body weight to stones and pounds

Input
70 kilograms
Result
154.323584 pounds (11 st 0.3 lb)

Divide the pounds by 14 for stones: 154.32 ÷ 14 = 11 stone with 0.32 lb remaining.

A recipe in ounces

Input
8 ounces
Result
226.796185 grams

Cooks usually round this to 225 g, which is close enough for baking but not for anything measured precisely.

Freight in tonnes

Input
2.5 tonnes
Result
5,511.55655 pounds

About the weight converter

Where weight conversion actually bites

Three situations account for most weight conversions: cooking from a recipe written in another country's units, tracking body weight against a target set in a different system, and shipping, where quoted rates and limits switch between kilograms and pounds without much warning.

Cooking is the most error-prone of the three, because volume and weight measures get mixed together. An ounce of flour is a weight; a fluid ounce is a volume, and the two are not interchangeable. If your recipe says 'fl oz', you want the volume converter.

Why the numbers have so many decimals

One pound is defined as exactly 0.45359237 kilograms, and every other imperial mass unit is built from it. That definition is what makes conversions here reproducible rather than approximate — the long decimals are the exact value, not noise.

For everyday purposes, rounding is perfectly reasonable. Just round at the end, once, rather than at each step of a multi-stage conversion, where small errors compound in ways that are hard to spot.

Frequently asked questions

How many pounds are in a kilogram?
2.20462262 pounds, from the exact definition of one pound as 0.45359237 kilograms. The rough figure of 2.2 is fine for a gym conversation and drifts once the numbers get large — across a full tonne it is out by about 4.6 pounds.
What is a stone, and where is it still used?
A stone is 14 pounds, or about 6.35 kg. It survives almost exclusively for body weight in the UK and Ireland, where someone might describe themselves as 11 stone 4 rather than 72 kg. It is not used for anything else, and not at all in the US.
Is a US ton the same as a UK ton or a tonne?
No — all three differ. A US short ton is 2,000 lb (907.18 kg), a UK long ton is 2,240 lb (1,016.05 kg), and a metric tonne is exactly 1,000 kg. On a large shipment the gap between them is easily worth thousands, so it is worth checking which one a quote means.
Are these ounces the same as the ones used for gold?
No. This converter uses avoirdupois ounces, the everyday kind at 28.35 g. Precious metals are priced in troy ounces of 31.10 g — about 10% heavier. Using the wrong one on a bullion price is a costly mistake.
Is weight the same thing as mass?
Strictly, no: mass is how much matter an object contains, while weight is the force gravity exerts on it. In everyday use on Earth the two track each other exactly, and scales in kilograms or pounds are really measuring mass. This tool converts mass, which is what practically everyone means.

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