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Weight and Mass

Browse Weight and Mass conversions

1 milligram = 0.001 gram

Reviewed June 18, 2026 Linear conversions use exact SI and international definitions where available. No account, tracking login, or third-party scoring required.
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Formula Summary

Result: 1 milligram = 0.001 gram

Formula: (1 x 0.000001) / 0.001

Rounding: Displayed to 6 decimal places by default, trimmed for readability. Use Detailed or Scientific for more precision.

How This Conversion Works

Milligram and gram are both used for weight and mass conversions. This page converts 1 milligram into 0.001 gram using the formula shown below.

Use this result for quick checks, comparisons, and everyday reference. For work that depends on exact precision, review the rounding setting and the assumption note before using the number.

The precision controls let you switch between a shorter result, the standard readable result, and scientific notation when the value is very large or very small.

Unit Notes
  • 1 milligram (mg) equals 0.000001 kilogram.
  • 1 gram (g) equals 0.001 kilogram.

Questions

How do you convert milligram to gram?

This page converts milligram to gram using this formula: (1 x 0.000001) / 0.001.

What is 1 milligram in gram?

1 milligram equals 0.001 gram.

How many decimals does this converter show?

Displayed to 6 decimal places by default, trimmed for readability. Use Detailed or Scientific for more precision. The precision buttons can also show a shorter result or scientific notation.

Equivalent Values
0.000001 kilogram
0.001 gram
1 milligram
0.000000001 metric tonne
0.0000022046 pound
0.000035274 ounce
0.0000001575 stone
0.0000000011 US short ton
Nearby Values
0.5 milligram 0.0005 gram
1 milligram 0.001 gram
2 milligram 0.002 gram
5 milligram 0.005 gram
10 milligram 0.01 gram
Full Details
Formula
(1 x 0.000001) / 0.001
Rounding
Displayed to 6 decimal places by default, trimmed for readability. Use Detailed or Scientific for more precision.
Assumption
Mass units use exact SI and international avoirdupois definitions where applicable.

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