Milligrams to Grams (mg to g) Converter
Enter a value to instantly convert between weight units.
Precision4 dp
1 Milligram = 0.001 Gram
Key Formulas
Kilogram → Pound
lb = kg × 2.20462Pound → Kilogram
kg = lb × 0.453592Gram → Ounce
oz = g × 0.035274Ounce → Gram
g = oz × 28.3495Formula
g = mg ÷ 1000Divide milligrams by 1000 to get grams. The prefix milli means one thousandth, so 1 mg is exactly 0.001 g. Use this conversion when a scale, label or lab sheet lists milligrams and you need grams. Moving the decimal point three places to the left gives the same answer.
Source: BIPM SI prefixes
Reviewed by the Convert Calc editorial team · Last reviewed: · see our methodology
Frequently Asked Questions
Real-World Examples
Example: 500 mg of powder on a lab scale.
500 mg = 0.5 g
Example: a 250 mg sample.
250 mg = 0.25 g
Example: a 1500 mg reading on a precision balance.
1500 mg = 1.5 g
Example: a 25 mg sample weighed for a test.
25 mg = 0.025 g