Milligrams to grams – convert mg to g
Convert milligrams to grams (mg to g) to move between small doses and larger mass values. Ideal for medicine, nutrition, chemistry and lab work where labels or calculations are given in mg but your tools or notes use grams.
Open the interactive mg → g converter:
Use main converter (mg → g) or switch to g → mgOn the homepage you can also convert between grams, kilograms, tonnes, ounces, pounds, stone and more for everyday and scientific mass units.
Quick reference: mg to g
The exact relationship is 1 g = 1000 mg, so: grams = milligrams ÷ 1000. Some common examples:
| Milligrams (mg) | Grams (g) |
|---|---|
| 100 mg | 0.1 g |
| 250 mg | 0.25 g |
| 500 mg | 0.5 g |
| 750 mg | 0.75 g |
| 1000 mg | 1 g |
| 1500 mg | 1.5 g |
| 5000 mg | 5 g |
Why convert milligrams to grams?
Typical reasons to convert mg to g include:
- Checking medicine or supplement doses against daily gram limits.
- Scaling a lab procedure written in milligrams up to gram quantities.
- Comparing trace ingredients on a food label with gram-based recipes.
- Teaching or learning metric prefixes (milli vs base units).
Other mass converters on this site
The main converter keeps all mass units consistent so you can hop between mg, g, kg, tonnes, ounces, pounds and stone without worrying about the underlying conversion factors.
Page last updated: 4 December 2025.