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Weight Converter

Courier counters read kilograms, American recipes read ounces, and British bathroom scales still read stone — so the parcel that sits 'under 20 kg' on one website weighs 44 lb on another. Converting by eye is how excess-baggage fees happen. This page takes any weight you enter and reports it in the metric and imperial units you actually meet, with the exact factor behind every pair.

Enter values

Measured in the unit you select as the from unit

Grams and kilograms for metric, ounces and pounds for imperial

Results update as you type.

Results

In pounds (lb)
55.1156
In grams (g)
25,000
In tonnes (t)
0.025
In ounces (oz)
881.849
In stones (st)
3.9368
Exact factor
1 kg = 2.204623 lb

How is the Weight Converter calculated?

Type the weight, choose the unit printed on the scale or the listing, and choose the unit you need. Your answer appears in the target unit first, followed by grams, tonnes, ounces and stones so an absurd result is visible at a glance. The bottom row gives the exact factor (1 kg = 2.204623 lb) for verifying the sum by hand, and the form accepts decimals such as 2.5 kg.

Formula

Convert through kilograms: kg = value × from factor, then target = kg ÷ to factor. Exact factors: 1 lb = 0.45359237 kg · 1 oz = 28.349523125 g · 1 stone = 6.35029318 kg (14 lb) · 1 tonne = 1,000 kg. The everyday one is pounds = kg ÷ 0.45359237, roughly kg × 2.2.

Example

A checked suitcase of 25 kg is 25 ÷ 0.45359237 = 55.12 lb — over the 50 lb (22.68 kg) limit many US airlines charge for. A pallet booked at 1.5 t is 1.5 × 2,204.62 = 3,306.93 lb of freight. In the kitchen, 500 g of flour is 500 ÷ 28.349523125 = 17.64 oz. Convert the limit itself before you travel, not your estimate of it.

Things to remember

Limits are set in one system and advertised in another, so check both numbers rather than one: a 23 kg allowance is 50.7 lb, and a 50 lb allowance is 22.68 kg. Mass does not change with location, though your bathroom scales change with calibration — re-run anything critical in a second unit here before you pay a fee.

Frequently Asked Questions

How many pounds are in one kilogram?

2.2046226218 lb, because one pound is defined as exactly 0.45359237 kg. For a quick estimate multiply kilograms by 2.2: a 70 kg person weighs about 154 lb and a 25 kg bag is about 55 lb of allowable weight.

What is the difference between mass and weight?

Mass is the amount of matter you have, measured in kilograms; weight is the force gravity exerts on that mass, measured in newtons. Your mass stays 70 kg anywhere, while your weight would drop to about a sixth on the Moon. Converters like this one treat kilograms as mass.

How do I convert kilograms to ounces?

Multiply kilograms by 35.2739619, since one ounce equals 28.349523125 g exactly. So 1 kg is 35.27 oz and 500 g is 17.64 oz. For cooking, grams to ounces is usually the direction you need, and the calculator handles it in one step.

How many kilograms are in a stone?

6.35029318 kg, because one stone is 14 pounds. That makes 10 stone equal to 63.5 kg, and 70 kg just over 11 stone — useful when a health goal is quoted in both systems, as it often is in the UK and Ireland.

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