Convert grams to mg
1 gram equals 1,000 milligrams. Enter a value below to convert instantly.
Need the other direction? Convert milligram to gram →
Formula
Multiply the number of grams by 1000 to get milligrams.
Step by step
- Start with 1 g.
- Multiply by the conversion factor 1000.
- 1 × 1000 = 1,000 mg.
Grams to Milligrams conversion table
| Grams (g) | Milligrams (mg) |
|---|---|
| 1 | 1,000 |
| 2 | 2,000 |
| 3 | 3,000 |
| 5 | 5,000 |
| 10 | 10,000 |
| 20 | 20,000 |
| 50 | 50,000 |
| 100 | 100,000 |
| 500 | 500,000 |
| 1,000 | 1,000,000 |
Convert Gram to other weight & mass units
1 g expressed in every other weight & mass unit on this site.
- Kilogram kg 0.001
- Gram g 1
- Hectogram hg 0.01
- Dekagram dag 0.1
- Decigram dg 10
- Centigram cg 100
- Milligram mg 1,000
- Microgram µg 1,000,000
- Nanogram ng 1,000,000,000
- Picogram pg 1,000,000,000,000
- Femtogram fg 1e+15
- Attogram ag 1e+18
- Petagram Pg 1e-15
- Exagram Eg 1e-18
- Metric Ton t 0.000001
- Kiloton (metric) kt 1e-9
- Megaton (metric) Mt 1e-12
- Quintal (metric) q 0.00001
- Carat ct 5
- Pound lb 0.0022046226
- Ounce oz 0.035273962
- Dram dr 0.56438339
- Grain gr 15.432358
- Stone st 0.00015747304
- Stone (US) st (US) 0.00017636981
- Quarter (UK) qr (UK) 0.000078736522
- Quarter (US) qr (US) 0.000088184905
- Hundredweight (UK) cwt (UK) 0.000019684131
- Hundredweight (US) cwt (US) 0.000022046226
- US Short Ton ton (US) 0.0000011023113
- UK Long Ton ton (UK) 9.8420653e-7
- Kip kip 0.0000022046226
- Slug slug 0.000068521766
- Hyl (kgf·s²/m) hyl 0.00010197162
- Assay Ton (US) AT (US) 0.034285714
- Assay Ton (UK) AT (UK) 0.030612245
- Troy Pound lb t 0.0026792289
- Troy Ounce oz t 0.032150747
- Pennyweight dwt 0.64301493
- Scruple (apothecary) s.ap 0.77161792
- Dram (apothecary) dr t 0.25720597
- Atomic Mass Unit u 6.0221408e+23
- Electron Mass (rest) mₑ 1.0977691e+27
- Proton Mass mₚ 5.9786374e+23
- Neutron Mass mₙ 5.9704077e+23
- Muon Mass mµ 5.3091755e+24
- Deuteron Mass m_d 2.9908035e+23
- Planck Mass mP 45,946.718
- Earth's Mass M⊕ 1.6744248e-28
- Sun's Mass M☉ 5.0278543e-34
- Talent (Biblical Hebrew) talent (He) 0.000029239766
- Mina (Biblical Hebrew) mina (He) 0.001754386
- Shekel (Biblical Hebrew) shekel 0.087719298
- Bekan (Biblical Hebrew) bekan 0.1754386
- Gerah (Biblical Hebrew) gerah 1.754386
- Talent (Biblical Greek) talent (Gk) 0.000049019608
- Mina (Biblical Greek) mina (Gk) 0.0029411765
- Tetradrachma (Biblical Greek) tetradrachma 0.073529412
- Didrachma (Biblical Greek) didrachma 0.14705882
- Drachma (Biblical Greek) drachma 0.29411765
- Denarius (Biblical Roman) denarius 0.25974026
- Assarion (Biblical Roman) assarion 4.1558442
- Quadrans (Biblical Roman) quadrans 16.623363
- Lepton (Biblical Roman) lepton 33.246781
- Gwan 관 0.00026666667
- Geun (600 g, meat) 근 0.0016666667
- Geun (375 g, produce) 근 (채소) 0.0026666667
- Nyang 냥 0.026666667
- Don 돈 0.26666667
- Pun (mass) 푼 2.6666667
About the gram
The gram (g) is a SI unit of weight & mass.
About the milligram
The milligram (mg) is a SI unit of weight & mass.
Where this conversion is used
Converting grams to milligrams comes up when tracking body weight, shipping parcels, cooking, and dosing in fitness or nutrition. In everyday language 'weight' usually means mass; true weight is a force and is handled in the Force category.
Related conversions
Frequently asked questions
How many milligrams are in a gram?
One gram equals 1,000 milligrams.
How do you convert grams to milligrams?
Multiply the number of grams by 1000 to get milligrams.
What is 1 milligram in grams?
One milligram equals 0.001 grams.
When would I convert grams to milligrams?
This conversion is common when tracking body weight, shipping parcels, cooking, and dosing in fitness or nutrition.
Conversion factors are based on internationally agreed unit definitions. See our methodology and sources for details on how these values are verified.