Convert Milligrams to Kilograms
Convert Milligrams (mg) to Kilograms (kg) instantly and accurately.
Conversion Formula
kg = mg × 1.000000000e-6
About Milligrams
A milligram (mg) is one thousandth of a gram (10⁻³ g). It is the primary unit for pharmaceutical dosing: aspirin tablets are typically 500 mg, ibuprofen 200-400 mg, and melatonin supplements 0.5-10 mg. Precious metal assay results and alloy compositions are specified in milligrams per kilogram (mg/kg = ppm). Nutritional labels worldwide list mineral content in milligrams - the recommended daily intake of iron is 8-18 mg, calcium 1000 mg, and sodium under 2300 mg. A grain of rice weighs about 25-30 mg, and a medium eyelash approximately 0.1 mg.
About Kilograms
The kilogram (kg) is the SI base unit of mass - the fundamental unit from which all other mass measurements in the metric system are derived. Since 2019 it has been defined by fixing the Planck constant h to exactly 6.62607015 × 10⁻³⁴ J·s, replacing the 130-year-old International Prototype Kilogram (a platinum-iridium cylinder kept in Sèvres, France). The kilogram governs daily life worldwide: body weight in most countries, grocery shopping, luggage allowances, postal rates, freight pricing, and ingredient quantities in cooking all reference kilograms.
Quick Reference Table
| Milligrams (mg) | Kilograms (kg) |
|---|---|
| 1 mg | 1 × 10-6 kg |
| 2 mg | 2 × 10-6 kg |
| 5 mg | 5 × 10-6 kg |
| 10 mg | 1 × 10-5 kg |
| 25 mg | 2.5 × 10-5 kg |
| 50 mg | 5 × 10-5 kg |
| 100 mg | 1 × 10-4 kg |