34 units · base unit kg · M
Weight & mass converter
Strictly these are units of mass, not weight — but the everyday usage is entrenched. The avoirdupois pound has been exactly 0.453 592 37 kg since 1959; troy units, used for precious metals, are a different system entirely.
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Show this value in all 34 weight & mass units
- Megagrams Mg 0.001
- Kilograms kg 1
- Hectograms hg 10
- Decagrams dag 100
- Grams g 1000
- Decigrams dg 10 000
- Centigrams cg 100 000
- Milligrams mg 1 000 000
- Micrograms µg 1 000 000 000
- Nanograms ng 1 000 000 000 000
- Picograms pg 1 000 000 000 000 000
- Tonnes t 0.001
- Kilotonnes kt 0.000 001
- Megatonnes Mt 1e-9
- Quintals q 0.01
- Carats ct 5000
- Pounds lb 2.204 622 621 85
- Ounces oz 35.273 961 949 6
- Drams dr 564.383 391 193
- Grains gr 15 432.358 352 9
- Stones st 0.157 473 044 418
- Hundredweight (US)s cwt (US) 0.022 046 226 218 5
- Hundredweight (UK)s cwt (UK) 0.019 684 130 552 2
- Short ton (US)s tn 0.001 102 311 310 92
- Long ton (UK)s LT 0.000 984 206 527 611
- Troy ounces ozt 32.150 746 568 6
- Troy pounds lbt 2.679 228 880 72
- Pennyweights dwt 643.014 931 373
- Slugs slug 0.068 521 765 856 8
- Atomic mass units u 6.02214075367e+26
- Electron masss mₑ 1.09776910426e+30
- Planck masss mₚ 45 946 718.3475
- Earth masss M🜨 1.67442483507e-25
- Solar masss M☉ 5.02785431289e-31
Every row is Kilogram (kg) converted through the kilogram, in exact rational arithmetic.
Common weight & mass conversions
- kg → g
- kg → mg
- kg → µg
- kg → t
- kg → ct
- kg → lb
- kg → oz
- kg → st
- kg → tn
- kg → ozt
- kg → u
- g → kg
- g → mg
- g → µg
- g → t
- g → ct
- g → lb
- g → oz
- g → st
- g → tn
- g → ozt
- g → u
- mg → kg
- mg → g
- mg → µg
- mg → t
- mg → ct
- mg → lb
- mg → oz
- mg → st
- mg → tn
- mg → ozt
- mg → u
- µg → kg
- µg → g
- µg → mg
- µg → t
- µg → ct
- µg → lb
- µg → oz
- µg → st
- µg → tn
- µg → ozt
- µg → u
- t → kg
- t → g
- t → mg
- t → µg
- t → ct
- t → lb
- t → oz
- t → st
- t → tn
- t → ozt
- t → u
- ct → kg
- ct → g
- ct → mg
- ct → µg
- ct → t
All weight & mass units
Each unit expressed in kilograms (kg), the unit everything in this category converts through.
| Unit | Symbol | System | Value in kg |
|---|---|---|---|
| Megagram | Mg | metric | 1000 |
| Kilogram | kg | metric | 1 |
| Hectogram | hg | metric | 0.1 |
| Decagram | dag | metric | 0.01 |
| Gram | g | SI | 0.001 |
| Decigram | dg | metric | 0.0001 |
| Centigram | cg | metric | 0.00001 |
| Milligram | mg | metric | 0.000001 |
| Microgram | µg | metric | 0.000000001 |
| Nanogram | ng | metric | 0.000000000001 |
| Picogram | pg | metric | 0.000000000000001 |
| Tonne | t | metric | 1000 |
| Kilotonne | kt | metric | 1000000 |
| Megatonne | Mt | metric | 1000000000 |
| Quintal | q | metric | 100 |
| Carat | ct | metric | 0.0002 |
| Pound | lb | imperial | 0.45359237 |
| Ounce | oz | imperial | 0.028349523125 |
| Dram | dr | imperial | 0.00177184519531 |
| Grain | gr | imperial | 0.00006479891 |
| Stone | st | imperial | 6.35029318 |
| Hundredweight (US) | cwt (US) | us | 45.359237 |
| Hundredweight (UK) | cwt (UK) | imperial | 50.80234544 |
| Short ton (US) | tn | us | 907.18474 |
| Long ton (UK) | LT | imperial | 1016.0469088 |
| Troy ounce | ozt | other | 0.0311034768 |
| Troy pound | lbt | other | 0.3732417216 |
| Pennyweight | dwt | other | 0.00155517384 |
| Slug | slug | imperial | 14.5939029372 |
| Atomic mass unit | u | atomic | 0.00000000000000000000000000166053906892 |
| Electron mass | mₑ | atomic | 0.000000000000000000000000000000910938371393 |
| Planck mass | mₚ | atomic | 0.00000002176434 |
| Earth mass | M🜨 | astronomical | 5972200000000000000000000 |
| Solar mass | M☉ | astronomical | 1988920000000000000000000000000 |
About weight & mass units
Convert kilograms, pounds, ounces, stones, tonnes and troy weights with exact conversion factors.
Strictly these are units of mass, not weight — but the everyday usage is entrenched. The avoirdupois pound has been exactly 0.453 592 37 kg since 1959; troy units, used for precious metals, are a different system entirely.
Dimensional formula: M. Every conversion on this page goes through the kilogram, using exact fractions rather than decimal approximations. Read how that works →