Result equals value times the ratio of conversion factors
Solution
All Mass Conversions
Unit
Value
Kilogram (kg)
1
Atomic Mass Unit (u)
6.0229553e+26
Attogram (ag)
1e+21
Carat Metric (ct)
5000
Centigram (cg)
100000
Decigram (dg)
10000
Dekagram (dag)
100
Dram (dr)
564.38339
Exagram (Eg)
1e-15
Femtogram (fg)
1e+18
Gigagram (Gg)
1e-6
Grain (gr)
15432.358
Gram (g)
1000
Hundredweight Long UK (cwt)
0.019684131
Hundredweight Short US (cwt)
0.022046226
Megagram (Mg)
0.001
Microgram (µg)
1.0000000e+9
Milligram (mg)
1000000
Nanogram (ng)
1e+12
Ounce (oz)
35.273962
Petagram (Pg)
1e-12
Picogram (pg)
1e+15
Planck Mass (mₚ)
45940892
Pennyweight (dwt)
643.01493
Pound (lb)
2.2046226
Slug (slug)
0.068521766
Solar Mass (M☉)
5.0273993e-31
Stone (st)
0.15747304
Teragram (Tg)
1e-9
Ton Long (long tn)
0.00098420653
Ton Metric (t)
0.001
Ton Short (short tn)
0.0011023113
Tonne (t)
0.001
Troy Ounce (oz t)
32.150747
Yoctogram (yg)
1e+27
Yottagram (Yg)
1e-21
Zeptogram (zg)
1e+24
Zettagram (Zg)
1e-18
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How It Works
This converter uses the pound as its internal base unit and multiplies the input value by the source unit’s factor, then divides by the target unit’s factor to produce the result.
All calculations use arbitrary-precision BigNumber arithmetic, ensuring accurate conversions across the full range from attograms to yottagrams.
Example
Convert 150 pounds to kilograms: 150 × 0.45359237 = 68.04 kg. The conversion factor 0.45359237 is the exact definition of one avoirdupois pound in kilograms.
Frequently Asked Questions
How many pounds are in a kilogram?
One kilogram equals approximately 2.20462 pounds. The kilogram is the SI base unit of mass, defined by the Planck constant since 2019.
What is the difference between mass and weight?
Mass measures the amount of matter in an object (kilograms), while weight is the gravitational force acting on that mass (newtons). On Earth’s surface, they are proportional, but in space an object has mass but virtually no weight.
How many ounces are in a pound?
There are exactly 16 ounces in one pound. This applies to avoirdupois ounces and pounds, which are the standard units used in everyday commerce in the US and UK.
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