Mass Converter
Convert a mass value between milligrams, grams, kilograms, ounces, pounds, and metric tons.
Example
Convert 1 kilogram to pounds: 1 kg = 1,000 g, and 1 lb = 453.59237 g, so 1,000 / 453.59237 = 2.2046 lb.
How it works
Every unit is defined as a factor relative to one gram, so the input is multiplied by its unit's factor to get grams, then divided by the target unit's factor. Factors used: mg=0.001, g=1, kg=1000, oz=28.349523125, lb=453.59237, ton(metric)=1,000,000.
Good to know
The Mass Converter turns a single mass value into its equivalent across six units: milligrams (mg), grams (g), kilograms (kg), ounces (oz), pounds (lb), and metric tons (t). You type a number, pick a "From" unit and a "To" unit, and it converts instantly in your browser. It is built for anyone juggling mixed measurement systems: cooks scaling a recipe, students checking science homework, shippers reading package labels, gym-goers translating kilos to pounds, or hobbyists working from datasheets that use a different unit than their scale.
Reach for it whenever two sources disagree on units, for example a parcel rated in kilograms when the carrier charges by the pound, or a supplement listed in milligrams when you only think in grams. Because every unit is mapped to a single gram-based factor, conversions stay consistent in both directions, so converting kg to lb and back returns the same number you started with.
Read the big "Result" line as the converted value in your target unit. The two stats underneath add context: "In grams" shows your input expressed in grams (the common reference all units share), and "Rate" gives the one-to-one exchange factor, such as 1 kg = 2.2046 lb, so you can reuse it for quick mental math on other quantities.
One caveat worth remembering: this tool measures mass, not force, and its "ton" is strictly the metric ton of 1,000 kg, not the US short ton or UK long ton. It also rounds for display (more decimals for small numbers, scientific notation for very large or very small ones), so for trade, dosing, or legal weights treat the figure as a precise estimate and confirm against the exact factors when accuracy is critical.
Frequently asked questions
Is a ton here a metric ton or a US ton?
This converter uses the metric ton (also called a tonne), which equals exactly 1,000 kilograms. It does not use the US short ton (2,000 lb) or UK long ton.
Are the pound and ounce US or imperial?
It uses the international avoirdupois definitions, where 1 pound = 453.59237 grams and 1 ounce = 28.349523125 grams. These are identical in the US and UK systems.
Is my data uploaded anywhere?
No — this calculator runs entirely in your browser. Your inputs never leave your device, and it works offline once loaded.
Is this calculator free?
Yes, completely free with no sign-up and no limits.
People also ask
How many grams are in a kilogram?
There are exactly 1,000 grams in one kilogram. A milligram is one-thousandth of a gram, so 1 kg also equals 1,000,000 mg.
How many pounds are in a kilogram?
One kilogram equals about 2.2046 pounds, because a pound is defined as 453.59237 grams. To go the other way, multiply pounds by roughly 0.4536 to get kilograms.
How many ounces are in a pound?
There are 16 avoirdupois ounces in one pound. Each ounce is 28.349523125 grams and each pound is 453.59237 grams, which works out to exactly 16.
What is the difference between mass and weight?
Mass is the amount of matter in an object and stays the same everywhere, while weight is the force gravity exerts on that mass and changes with location. This tool converts mass units, though everyday scales report results in the same kg/lb units people call weight.
How many kilograms are in a metric ton?
A metric ton, also written as a tonne, equals exactly 1,000 kilograms or 1,000,000 grams. It is different from the US short ton, which is 2,000 pounds (about 907 kg).
How do you convert milligrams to grams?
Divide the number of milligrams by 1,000 to get grams, since 1 gram contains 1,000 milligrams. For example, 500 mg equals 0.5 g.
Is a US ton the same as a metric ton?
No. A metric ton is 1,000 kg (about 2,204.6 lb), while a US short ton is 2,000 lb (about 907.2 kg) and a UK long ton is 2,240 lb (about 1,016 kg). This converter uses the metric ton only.
How do you convert pounds to grams?
Multiply the number of pounds by 453.59237 to get grams. For instance, 2 lb equals 907.18474 g.
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