Milligram to Gram Converter
Weight · unit-converter
Convert Milligram to Gram with a fixed input and output unit, step-by-step formula line, and reference tables. All calculations use gram-based factors (international avoirdupois pound and metric definitions). The full Weight Converter also includes carat, grain, and US/UK hundredweight.
Calculator
From: Milligram (mg)
To: Gram (g)
About Milligram
The milligram is one thousandth of a gram. Medication doses and fine measurements use milligrams.
About Gram
The gram is one thousandth of a kilogram. Recipes, lab work, and small masses typically use grams.
How to convert milligrams to grams
1 milligram is equal to 0.001 gram:
1 mg = (0.001 g ÷ 1 g) g = 0.001 g
1 milligram = 1/1,000 gram.
Each milligram is defined as 0.001 g and each gram as 1 g, so one mg equals 0.001 ÷ 1 g = 0.001 g.
Let w(mg) be the numeric value of the same mass measured in Milligram (mg), and w(g) the value in Gram (g). Then:
w(g) = w(mg) × (0.001 / 1)
Equivalently, divide by how many mg fit into one g (grams per g divided by grams per mg):
w(g) = w(mg) ÷ 1000
Or: gram = milligram ÷ 1000
Examples
Example #1: Convert 20 mg to gram
20 mg = 20 mg × (0.001/1) g = 0.02 g
20 mg = 20 mg ÷ 1000 = 0.02 g
Example #2: Convert 50 mg to gram
50 mg = 50 mg × (0.001/1) g = 0.05 g
50 mg = 50 mg ÷ 1000 = 0.05 g
Summary
To convert Milligram to Gram, multiply the value in mg by the ratio of grams per mg divided by grams per g. Equivalently: value_g = value_mg × (0.001 / 1). Numerically, 1 mg equals 0.001 g.
Relationship context
Both units are metric (SI) and tied to the gram via the kilogram. Conversions use exact ratios from their gram definitions. The factor from Milligram to Gram is 1.000000e-3 (1 mg = 0.001 g).
Conversion tables
| Milligram (mg) | Gram (g) |
|---|---|
| 0.1 | 0.0001 |
| 1 | 0.001 |
| 2 | 0.002 |
| 3 | 0.003 |
| 4 | 0.004 |
| 5 | 0.005 |
| 6 | 0.006 |
| 7 | 0.007 |
| 8 | 0.008 |
| 9 | 0.009 |
| Milligram (mg) | Gram (g) |
|---|---|
| 10 | 0.01 |
| 20 | 0.02 |
| 30 | 0.03 |
| 40 | 0.04 |
| 50 | 0.05 |
| 60 | 0.06 |
| 70 | 0.07 |
| 80 | 0.08 |
| 90 | 0.09 |
| 100 | 0.1 |