ConvBolt — Unit ConverterMilligrams to Grams Converter
Converting milligrams to grams is a multiplication by a fixed factor: 1 mg = 0.001 g. The table below covers the values people look up most often, and the formula section shows exactly where that factor comes from.
Because one milligram works out to 0.001 g, the gram is the far smaller unit of the two: a figure given in gram always carries a smaller number than the same measurement in milligram. A chart drawn in mg can hide that, so check which label the axis uses before you compare two readings.
Cooking and shipping are the two places this pair appears most: a kitchen scale reads in milligrams while a recipe or label is written in grams, and a courier tariff built on grams still has to be checked against a scale showing milligrams.
The conversion factor used here is 0.001 g per milligram (3 significant digits as shown). Kept to seven figures it covers professional measurement; if you round it to two or three decimals for a spreadsheet, the error scales with the input — at a value of 1,000 mg a factor rounded to three decimals can be off by a measurable amount. The reverse direction uses 1000 mg per g, the exact reciprocal, so a round trip through both pages returns your original number.
Milligrams to Grams formula
Use this formula to convert any milligram value to grams:
Worked example: 100 mg × 0.001 = 0.1 g.
Milligrams to Grams conversion table
| Milligrams (mg) | Grams (g) |
|---|---|
| 0.5 mg | 0.0005 g |
| 1 mg | 0.001 g |
| 2 mg | 0.002 g |
| 5 mg | 0.005 g |
| 10 mg | 0.01 g |
| 20 mg | 0.02 g |
| 50 mg | 0.05 g |
| 100 mg | 0.1 g |
| 500 mg | 0.5 g |
| 1000 mg | 1 g |
How to convert milligrams to grams
Multiply the milligram value by 0.001 to get the equivalent in grams. This single factor works for every value in the table above and for anything else you need — there is no per-value adjustment, which is why a conversion table and a calculator always agree.
If you need the opposite direction, use the Grams to Milligrams converter instead of dividing by hand; both pages use the same source factors. For every other mg conversion in one place, see the mg conversion hub.
Frequently asked questions
How many grams are in 1 milligram?
1 milligram = 0.001 g.
What is 100 milligrams in grams?
100 mg = 0.1 g.
Is converting milligrams to grams the same as grams to milligrams?
No — the direction changes the multiplier. The reverse conversion (1 g = 1000 mg) is on the Grams to Milligrams page.
Related conversions
Try the ConvBolt Unit Converter for any other weight unit, browse the Weight conversions, or read our conversion guides.