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Weight & Mass Converter

Convert between kilograms, pounds, ounces, grams, stones, and tons.. Use this smart bidirectional calculator to convert between different weight & mass measurements instantly. See live results, calculation history, and exact formulas.

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Weight & Mass Converter

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Formula

g = kg × 1000

To convert Kilogram to Gram, use the formula displayed above.

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Recent History

Conversions you copy will be recorded here.
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How to Convert Weight & Mass Units

To perform a conversion, look up the target unit's conversion factor relative to the base unit (kilogram). Below are the exact mathematical formulas for the most common weight & mass unit pairs:

Kilogram to Pound lb = kg × 2.204622622
Pound to Kilogram kg = lb × 0.45359237
Gram to Ounce oz = g × 0.035273962
Ounce to Gram g = oz × 28.349523125

Weight & Mass Unit Conversion Charts

Here are the standard reference conversion charts displaying values from 1 to 20 for the most popular unit conversions:

kg to lb

kg lb
1 2.204623
2 4.409245
3 6.613868
4 8.81849
5 11.023113
6 13.227736
7 15.432358
8 17.636981
9 19.841604
10 22.046226
11 24.250849
12 26.455471
13 28.660094
14 30.864717
15 33.069339
16 35.273962
17 37.478585
18 39.683207
19 41.88783
20 44.092452

lb to kg

lb kg
1 0.453592
2 0.907185
3 1.360777
4 1.814369
5 2.267962
6 2.721554
7 3.175147
8 3.628739
9 4.082331
10 4.535924
11 4.989516
12 5.443108
13 5.896701
14 6.350293
15 6.803886
16 7.257478
17 7.71107
18 8.164663
19 8.618255
20 9.071847

g to oz

g oz
1 0.035274
2 0.070548
3 0.105822
4 0.141096
5 0.17637
6 0.211644
7 0.246918
8 0.282192
9 0.317466
10 0.35274
11 0.388014
12 0.423288
13 0.458562
14 0.493835
15 0.529109
16 0.564383
17 0.599657
18 0.634931
19 0.670205
20 0.705479

oz to g

oz g
1 28.349523
2 56.699046
3 85.048569
4 113.398093
5 141.747616
6 170.097139
7 198.446662
8 226.796185
9 255.145708
10 283.495231
11 311.844754
12 340.194277
13 368.543801
14 396.893324
15 425.242847
16 453.59237
17 481.941893
18 510.291416
19 538.640939
20 566.990463

Every Weight & Mass Unit, Explained

Weight & Mass conversion covers 10 units. Below is a plain-English definition of each one and where you'll actually meet it in daily life.

Kilogram (kg)

The kilogram is the SI base unit of mass, defined by the Planck constant and represented by a platinum-iridium prototype historically.

Used for: Body weight, groceries, shipping weights, and scientific mass measurements worldwide.

Gram (g)

A gram is one-thousandth of a kilogram, about the weight of a paperclip.

Used for: Nutrition labels, jewelry, cooking ingredient weights, and postal rates for small items.

Milligram (mg)

A milligram is one-thousandth of a gram, about the mass of a grain of salt.

Used for: Medication dosages, supplement labels, and analytical chemistry measurements.

Microgram (µg)

A microgram is one-millionth of a gram.

Used for: Vitamin and hormone dosages, air-pollutant concentrations, and pharmaceutical formulations.

Pound (lb)

A pound is exactly 0.45359237 kilograms, the everyday mass unit in the US and UK.

Used for: Body weight, food quantities, luggage limits, and gym weights in imperial countries.

Ounce (oz)

An ounce is 1/16 of a pound, exactly 28.349523125 grams.

Used for: Cooking, postal rates, precious-metal trading (troy ounce variants), and packaged food.

Stone (st)

A stone is 14 pounds or exactly 6.35029318 kilograms.

Used for: Body weight in the UK and Ireland, where people often report weight in stones and pounds.

US Ton (ton)

The US short ton is 2,000 pounds, exactly 907.18474 kilograms.

Used for: US industrial and construction quantities, freight, and aggregate materials.

Metric Ton (t)

The metric ton (tonne) is exactly 1,000 kilograms.

Used for: International shipping, vehicle payloads, industrial materials, and CO2 emissions reporting.

Carat (ct)

A carat is exactly 0.2 grams, the standard unit for gemstone weight.

Used for: Diamonds and other precious stones; a 1-carat diamond weighs 200 milligrams.

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Specialist Weight & Mass Calculators & Real-World Niche Tools

Standard weight and mass units like kilograms, pounds, grams, and ounces are used globally, but specific industries like culinary baking, metallurgy, and construction logistics demand much more detailed density and structural load conversions.

In culinary arts, baking success relies on converting ingredient weight (grams) from volume (cups, tablespoons) because packing density differs between flour, butter, and white sugar. In heavy fabrication, steel weight calculators estimate raw beam or plate weights based on linear dimensions and metal grades, while rebar calculators determine structural reinforcement loading. For land developers, gravel weight calculators convert volume in cubic yards into tons to estimate hauling weights. Using these specialized weight calculators prevents structural calculation errors and material shipping underestimations.

Related searches: cups to grams baking · steel weight calculator kg/m · rebar size weight chart · gravel tons to yards · pounds and ounces to kg · baking ingredient density

Flour Cups to Grams Convert baking flour cups to grams. Butter Cups to Grams Convert baking butter cups to grams. Pounds & Ounces to kg Convert compound weight measurements. Steel Weight Calc Estimate steel bar or plate weights. Rebar Weight Calc Calculate rebar linear weights and sizing. Gravel Weight Tons/Yards Convert gravel volume to tons weight.

Weight & Mass Converter FAQs

What is a Weight & Mass converter?
A Weight & Mass converter is a free online utility that transforms a measurement expressed in one unit of weight & mass into its equivalent in another, such as converting Kilogram to Gram.
How do you convert weight & mass units?
To convert weight & mass units, choose your from-unit and to-unit from the dropdown list in the tool above, then enter the value you wish to convert. The tool computes the result live in real time using exact SI conversion factor formulas.
What are the most popular weight & mass conversions?
The most frequently performed weight & mass conversions on our site are Kilogram to Pound, Pound to Kilogram, Gram to Ounce. Our tool pre-calculates full charts and formulas for all of them.
Which weight & mass units are supported?
We support all standard global SI (metric) and imperial units including Kilogram (kg), Gram (g), Milligram (mg), Microgram (µg), Pound (lb), Ounce (oz), and others.
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