Unit Converter

Mass Unit Converter

Kilogram (kg)

Gram (g)

Milligram (mg)

Microgram (μg)

Metric Ton (t)

Pound (lb)

Ounce (oz)

Stone (st)

Jin (斤)

Liang (两)

Qian (钱)

Carat (ct)

Grain (gr)

Slug

Atomic Mass Unit (u)

Dalton (Da)

Electron Mass (me)

Proton Mass (mp)

Electron-volt/c² (eV/c²)

Mega-electron-volt/c² (MeV/c²)

Giga-electron-volt/c² (GeV/c²)

Tera-electron-volt/c² (TeV/c²)

Mass Unit Conversion Chart

Kilogram (kg) to Gram (g)

1 kg = 1,000,000 mg

Kilogram (kg) to Milligram (mg)

1 kg = 0.00100000 t

Kilogram (kg) to Metric Ton (t)

1 kg = 2.205 lb

Kilogram (kg) to Pound (lb)

1 kg = 35.274 oz

Kilogram (kg) to Ounce (oz)

Kilogram (kg) to Jin (斤) (jin)

1 kg = 5,000 ct

Kilogram (kg) to Carat (ct)

1 g = 0.00100000 kg

Gram (g) to Kilogram (kg)

Gram (g) to Milligram (mg)

1 g = 0.00000100000 t

Gram (g) to Metric Ton (t)

1 g = 0.00220462 lb

Gram (g) to Pound (lb)

1 g = 0.0352740 oz

Gram (g) to Ounce (oz)

1 g = 0.00200000 斤

Gram (g) to Jin (斤) (jin)

Gram (g) to Carat (ct)

1 mg = 0.00000100000 kg

Milligram (mg) to Kilogram (kg)

1 mg = 0.00100000 g

Milligram (mg) to Gram (g)

1 mg = 1.00000e-9 t

Milligram (mg) to Metric Ton (t)

1 mg = 0.00000220462 lb

Milligram (mg) to Pound (lb)

1 mg = 0.0000352740 oz

Milligram (mg) to Ounce (oz)

1 mg = 0.00000200000 斤

Milligram (mg) to Jin (斤) (jin)

1 mg = 0.00500000 ct

Milligram (mg) to Carat (ct)

Metric Ton (t) to Kilogram (kg)

1 t = 1,000,000 g

Metric Ton (t) to Gram (g)

1 t = 1,000,000,000 mg

Metric Ton (t) to Milligram (mg)

1 t = 2,204.623 lb

Metric Ton (t) to Pound (lb)

1 t = 35,273.962 oz

Metric Ton (t) to Ounce (oz)

1 t = 2,000 斤

Metric Ton (t) to Jin (斤) (jin)

1 t = 5,000,000 ct

Metric Ton (t) to Carat (ct)

1 lb = 0.453592 kg

Pound (lb) to Kilogram (kg)

1 lb = 453.592 g

Pound (lb) to Gram (g)

1 lb = 453,592.37 mg

Pound (lb) to Milligram (mg)

1 lb = 0.000453592 t

Pound (lb) to Metric Ton (t)

Pound (lb) to Ounce (oz)

1 lb = 0.907185 斤

Pound (lb) to Jin (斤) (jin)

1 lb = 2,267.962 ct

Pound (lb) to Carat (ct)

1 oz = 0.0283495 kg

Ounce (oz) to Kilogram (kg)

Ounce (oz) to Gram (g)

1 oz = 28,349.523 mg

Ounce (oz) to Milligram (mg)

1 oz = 0.0000283495 t

Ounce (oz) to Metric Ton (t)

1 oz = 0.0625000 lb

Ounce (oz) to Pound (lb)

1 oz = 0.0566990 斤

Ounce (oz) to Jin (斤) (jin)

1 oz = 141.748 ct

Ounce (oz) to Carat (ct)

1 斤 = 0.500000 kg

Jin (斤) (jin) to Kilogram (kg)

Jin (斤) (jin) to Gram (g)

1 斤 = 500,000 mg

Jin (斤) (jin) to Milligram (mg)

1 斤 = 0.000500000 t

Jin (斤) (jin) to Metric Ton (t)

1 斤 = 1.102 lb

Jin (斤) (jin) to Pound (lb)

1 斤 = 17.637 oz

Jin (斤) (jin) to Ounce (oz)

1 斤 = 2,500 ct

Jin (斤) (jin) to Carat (ct)

1 ct = 0.000200000 kg

Carat (ct) to Kilogram (kg)

1 ct = 0.200000 g

Carat (ct) to Gram (g)

Carat (ct) to Milligram (mg)

1 ct = 2.00000e-7 t

Carat (ct) to Metric Ton (t)

1 ct = 0.000440925 lb

Carat (ct) to Pound (lb)

1 ct = 0.00705479 oz

Carat (ct) to Ounce (oz)

1 ct = 0.000400000 斤

Carat (ct) to Jin (斤) (jin)

Common mass unit conversions: kilogram to gram (kg to g), gram to milligram (g to mg), pound to kilogram (lb to kg), ounce to gram (oz to g), ton to kilogram (t to kg), kilogram to pound (kg to lb), gram to ounce (g to oz), milligram to gram (mg to g). Convert mass units easily with precise calculations.

Popular Unit Conversions

Direct links to common conversion pages with formulas, tables, and FAQ.

kg to lbKilogram (kg) to Pound (lb)lb to kgPound (lb) to Kilogram (kg)g to ozGram (g) to Ounce (oz)oz to gOunce (oz) to Gram (g)mg to gMilligram (mg) to Gram (g)g to mgGram (g) to Milligram (mg)ug to mgMicrogram (μg) (ug) to Milligram (mg)mg to ugMilligram (mg) to Microgram (μg) (ug)kg to gKilogram (kg) to Gram (g)g to kgGram (g) to Kilogram (kg)ct to gCarat (ct) to Gram (g)g to ctGram (g) to Carat (ct)

Principles & formula sources

Mass conversion is linear. SI uses kilogram (kg); g and mg are decimal subdivisions. lb/oz are fixed by international agreement relative to kg.

We convert via kg: target = source × (source→kg) ÷ (target→kg). For u, factors follow recommended constants.

Formula & example

Formula: value_target = value_source * (source_to_kg) / (target_to_kg).

Example: 5 lb = 2.26796 kg; 250 g = 0.25 kg.

Common errors & notes

Mass vs force: kg is not N. Use the force converter for weight.
Prefixes: mg/g/kg differ by 10³—double-check the prefix.
Very small values may need higher display precision.

Practical use cases

Mass conversions are common in lab prep, shipping, and packaging where labels switch between kg, g, lb, and oz.

For scientific reporting, align mass units with the rest of the dataset so derived values (density, concentration) remain consistent.

References / data sources

BIPM — SI Brochure (kilogram)
NIST SP 811 — Guide for the Use of SI
CODATA — Recommended values of physical constants (for u, etc.)