Milligrams to grams is a division by 1,000: 500 mg = 0.5 g, 1,250 mg = 1.25 g. Medicine dosages, supplement labels and nutrition facts live in milligrams; recipes and kitchen scales work in grams, so this is the conversion that bridges the two.
Where you'll meet this conversion
- A 500 mg paracetamol tablet contains half a gram of active ingredient.
- The recommended sodium limit of 2,300 mg a day is 2.3 g — about a level teaspoon of salt (which is 40% sodium by weight, so ~5.8 g of salt).
- A supplement listing 1,000 mg of vitamin C is 1 g.
Common mistake
Mixing up mg with mcg (µg, micrograms): 1 mg = 1,000 µg. Vitamin D and B12 doses are in micrograms, so a "1000" on the label can mean a thousandth of what a "1000 mg" label means.
Quick answer: one milligram equals 0.001 grams. So to convert milligrams to grams, multiply by 0.001.
How to convert milligrams to grams
grams = milligrams × 0.001
The milligram — one thousandth of a gram — is the unit of medicine dosages and nutrition labels, where tiny quantities matter enormously.
The gram is the metric everyday unit for cooking ingredients, letters and jewelry. Originally defined as the mass of a cubic centimeter of water.
Milligram to Gram conversion table
| Milligram (mg) | Gram (g) |
|---|---|
| 0.01 mg | 0.00001 g |
| 0.1 mg | 0.0001 g |
| 0.25 mg | 0.00025 g |
| 0.4 mg | 0.0004 g |
| 0.75 mg | 0.00075 g |
| 1.25 mg | 0.00125 g |
| 1.75 mg | 0.00175 g |
| 2.5 mg | 0.0025 g |
| 3.5 mg | 0.0035 g |
| 4.5 mg | 0.0045 g |
| 6 mg | 0.006 g |
| 8 mg | 0.008 g |
| 10 mg | 0.01 g |
| 12 mg | 0.012 g |
| 14 mg | 0.014 g |
| 16 mg | 0.016 g |
| 18 mg | 0.018 g |
| 20 mg | 0.02 g |
| 24 mg | 0.024 g |
| 26 mg | 0.026 g |
| 30 mg | 0.03 g |
| 35 mg | 0.035 g |
| 45 mg | 0.045 g |
| 55 mg | 0.055 g |
| 65 mg | 0.065 g |
| 75 mg | 0.075 g |
| 85 mg | 0.085 g |
| 95 mg | 0.095 g |
| 110 mg | 0.11 g |
| 125 mg | 0.125 g |
| 175 mg | 0.175 g |
| 250 mg | 0.25 g |
| 350 mg | 0.35 g |
| 450 mg | 0.45 g |
| 600 mg | 0.6 g |
| 750 mg | 0.75 g |
| 900 mg | 0.9 g |
| 1,500 mg | 1.5 g |
| 2,500 mg | 2.5 g |
| 10,000 mg | 10 g |
Need the opposite direction? Use the Gram to Milligram converter, or read our complete guide to weight conversions for every formula in one place.
Frequently asked questions
How many grams are in one milligram?
One milligram equals 0.001 grams. Multiply any milligram value by 0.001 to get grams.
What is 10 milligrams in grams?
10 milligrams equal 0.01 grams (10 × 0.001).
Is the milligram to gram conversion exact?
The conversion factor used here (0.001) is based on the internationally agreed definitions of both units, so results are exact up to rounding of the final decimal places.
Is my data stored when I use this converter?
No. The conversion runs entirely in your browser with JavaScript — nothing you type is sent to a server, logged or stored.