/convert/grams-to-milligrams/ Convert grams to milligrams instantly. Enter any value and get the result. Includes a conversion table and the exact formula. article Grams to Milligrams Converter — 247QuickTools ,{ "@context": "https://schema.org", "@type": "SpeakableSpecification", "cssSelector": [".tool-intro", ".info-gain-section"] }
⚖️ Weight & Mass

Grams to Milligrams Converter

Convert grams to milligrams instantly. Enter any value and get the result. Includes a conversion table and the exact formula.

Quick answer: To convert grams to milligrams, multiply by 1000. For example, 1 grams = 1000 milligrams. Use the calculator below for any value.
grams to milligrams
→
Common conversions
Grams Milligrams
Formula:

How to convert grams to milligrams

1

Enter your value

Type the number of grams you want to convert into the left box. The result in milligrams appears instantly in the right box. You can also type into the right box to convert in the other direction.

2

Use the swap button

Click the ⇄ Swap button to reverse the conversion — Milligrams to Grams. Your current value carries across so you don't have to re-enter anything.

3

About Grams and Milligrams

grams and milligrams are both units of weight and mass. Use this converter to switch between them instantly.

💡 Did you know?

1 g = 1,000 mg. Salt: UK NHS daily limit is 6 g = 6,000 mg of sodium chloride. A standard packet of crisps (25 g) contains 0.4-0.6 g = 400-600 mg of salt. A teaspoon of salt weighs 6 g = 6,000 mg — the entire daily allowance in one measure.

📊 Common conversions at a glance
Grams Milligrams
0.1 100
0.5 500
1 1000
2 2000
5 5000
10 1e+04
Reviewed for 2026. Grams ↔ Milligrams conversion factor verified against published reference data. Built by a UK-based qualified primary teacher and FA Level 2 coach as part of 247QuickTools' free utility-tools project.