Convert Kilograms to Milligrams
1 kilogram (kg) equals 1000000 milligrams (mg).
1 kg = 1000000 mg
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk kilogram to milligram converter to paste a column from Excel.
How to Convert Kilogram to Milligram
- 1 kg = 1000000 mg
- 1 mg = 0.000001 kg
- Example: convert 15 kg to mg: 15 kg = 15 × 1000000 mg = 15000000 mg
Formula
mg = kg × 1000000
Derivation from SI units:
- SI base unit, fixed by the Planck constant h = 6.626 070 15 × 10⁻³⁴ J·s
- 1 mg = 10⁻⁶ kg = 10⁻³ g
Both units are defined exactly, so the factor is exact. Kilogram definition: kilogram; Milligram definition: milligram.
Worked examples
- A reading of 10 kg converts to 10000000 mg.
10 kg × 1000000 = 10000000 mg - A value of 60 kg is 60000000 mg.
60 kg × 1000000 = 60000000 mg
Kilogram to Milligram conversion table
| Kilograms (kg) | Milligrams (mg) |
|---|---|
| 0.1 kg | 100000 mg |
| 0.25 kg | 250000 mg |
| 0.5 kg | 500000 mg |
| 1 kg | 1000000 mg |
| 2 kg | 2000000 mg |
| 2.5 kg | 2500000 mg |
| 3 kg | 3000000 mg |
| 5 kg | 5000000 mg |
| 10 kg | 10000000 mg |
| 15 kg | 15000000 mg |
| 20 kg | 20000000 mg |
| 23 kg | 23000000 mg |
| 25 kg | 25000000 mg |
| 30 kg | 30000000 mg |
| 40 kg | 40000000 mg |
| 50 kg | 50000000 mg |
| 55 kg | 55000000 mg |
| 60 kg | 60000000 mg |
| 65 kg | 65000000 mg |
| 70 kg | 70000000 mg |
| 75 kg | 75000000 mg |
| 80 kg | 80000000 mg |
| 90 kg | 90000000 mg |
| 100 kg | 100000000 mg |
| 150 kg | 150000000 mg |
| 1000 kg | 1000000000 mg |
Where it's used
Kilograms are used for body weight and food packaging, while milligrams appear in medication doses (e.g. 500 mg tablets). Both measure mass (commonly called weight), so the conversion is a fixed factor.
Kilogram to other weight and mass units
| Conversion | 1 kg equals |
|---|---|
| kilogram to gram | 1000 g |
| kilogram to milligram | 1000000 mg |
| kilogram to microgram | 1000000000 µg |
| kilogram to metric ton | 0.001 t |
| kilogram to pound | 2.204622622 lb |
| kilogram to ounce | 35.27396195 oz |
| kilogram to stone | 0.1574730444 st |
| kilogram to short ton | 0.001102311311 ton (US) |
| kilogram to long ton | 0.0009842065276 ton (UK) |
| kilogram to grain | 15432.35835 gr |
| kilogram to troy ounce | 32.15074657 oz t |
| kilogram to carat | 5000 ct |
Frequently asked questions
How many milligrams are in 1 kilogram?
1 kg = 1000000 mg.
How do I convert kilograms to milligrams?
Multiply the value in kg by 1000000. For example, 15 kg × 1000000 = 15000000 mg.
Is the kg to mg conversion exact?
Yes. Both units are defined exactly, and 1 kg is exactly 1000000 mg.
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Section 2.3.1, base unit definitions.
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 7, SI prefixes.
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Kilograms to Milligrams. Retrieved October 17, 2026, from https://scientificconverters.com/mass/kilograms-to-milligrams/
IEEE
Scientific Converters, "Convert Kilograms to Milligrams," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/mass/kilograms-to-milligrams/