Weight Converter

How to use this calculator: mg to g

1. 1Enter the value measured in milligram (mg).
2. 2Confirm the direction is Milligram (mg) to Gram (g); reversing the units changes the factor or offset.
3. 3Apply g = mg × 0.001. The live converter performs this substitution as you type.
4. 4Read the answer in g and keep only justified precision.

Conversion formula

Milligram and Gram express the same weight quantity. This page converts through the category's canonical base unit, except temperature and fuel-economy pairs, which use their explicit scale or reciprocal equations.

The units measure the same quantity at different scales: 1 mg = 0.001 g, and 1 g = 1,000 mg.

Worked conversion example: Milligram to Gram

1. Given: 1 mg
2. Substitute: g = 1 × 0.001 = 0.001
3. Result: 1 mg = 0.001 g

Accuracy checklist

The converter keeps extra precision internally. Report only the precision supported by the original measurement and follow the required rounding rule.

Direction check: a smaller unit usually gives a larger number; temperature is an exception.

Unit definitions and SI traceability: NIST Office of Weights and Measures — SI Units.