Milligram to Gram Converter
Type a value — the answer appears instantly. 1 mg = 0.001 g.
Reviewed by the OmniCalc teamMethod verified 2026-07-01
0.001 grams
= 0.000001 kg= 0.0000022046 lb
equals 0.001 gramsFormula: g = mg × 0.001
Milligram to Gram formula
g = mg × 0.001
Convert 5 milligrams to grams
- Start with 5 milligrams.
- Multiply by the conversion factor: 5 × 0.001 = 0.005.
- So 5 mg = 0.005 g.
Milligram to Gram conversion table
| Milligrams (mg) | Grams (g) |
|---|---|
| 0.01 mg | 0.00001 g |
| 0.1 mg | 0.0001 g |
| 0.25 mg | 0.00025 g |
| 0.5 mg | 0.0005 g |
| 1 mg | 0.001 g |
| 2 mg | 0.002 g |
| 3 mg | 0.003 g |
| 4 mg | 0.004 g |
| 5 mg | 0.005 g |
| 6 mg | 0.006 g |
| 7 mg | 0.007 g |
| 8 mg | 0.008 g |
| 9 mg | 0.009 g |
| 10 mg | 0.01 g |
| 15 mg | 0.015 g |
| 20 mg | 0.02 g |
| 25 mg | 0.025 g |
| 30 mg | 0.03 g |
| 40 mg | 0.04 g |
| 50 mg | 0.05 g |
| 75 mg | 0.075 g |
| 100 mg | 0.1 g |
| 250 mg | 0.25 g |
| 500 mg | 0.5 g |
| 1,000 mg | 1 g |
| 5,000 mg | 5 g |
| 10,000 mg | 10 g |
Unit definitions
What is a milligram?
The milligram is one millionth of a kilogram, or one thousandth of a gram. It is the standard unit for dosing medication, vitamins, and nutritional supplements, and for weighing very small quantities in laboratories. A grain of table salt weighs roughly one milligram.
What is a gram?
The gram is one thousandth of a kilogram and the everyday metric unit for food, cooking, and postage. Nutrition labels, recipes, and letter weights are all given in grams. A standard paperclip weighs about one gram.
Frequently asked questions
How many grams are in one milligram?
One milligram equals 0.001 grams (1 mg = 0.001 g).
How do I convert milligrams to grams?
Multiply the value in milligrams by 0.001. For example, 10 mg × 0.001 = 0.01 g.
Which is bigger — a milligram or a gram?
A gram is bigger: one gram contains 1,000 milligrams.
Is this milligram to gram converter free?
Yes — the converter is free, works offline once loaded, and computes instantly in your browser without sending your numbers to a server.
Conversion factors follow international definitions (SI / NIST). Last verified 2026-07-01.