Convert Milligram to Decigram
Convert milligrams to decigrams instantly. 1 milligram = 0.01 decigram — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Decigram to Milligram converter for the reverse conversion.
Units explained
Milligram
A milligram (mg) equals one-millionth of a kilogram, or 0.001 gram.
From the SI prefix 'milli-' (from Latin 'mille', thousand).
Standard for medicine dosing, nutrition labels, and fine jewelry.
Part of the original metric system of 1795.
Decigram
A decigram (dg) equals 0.0001 kilogram, or 0.1 gram.
From the SI prefix 'deci-' (from Latin 'decimus', tenth).
Occasional laboratory and pharmacy use.
Part of the original metric system of 1795.
Milligram to Decigram conversion formula
The relationship between milligrams and decigrams:
To convert milligrams to decigrams, multiply the value in milligrams by 0.01. To reverse, multiply decigrams by 100.
How to use this converter
Type a value into the calculator. The result in decigrams updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Decigram to Milligram converter for the reverse direction.
Step-by-step: convert milligrams to decigrams
- Write down the value in milligrams (mg).
- Multiply that value by the factor 0.01.
- The product is the equivalent value in decigrams (dg).
- To reverse, multiply the decigram value by 100.
Worked examples
Example 1 — Convert 1 mg to dg:
1 × 0.01 = 0.01 dg
Example 2 — Convert 100 mg to dg:
100 × 0.01 = 1 dg
Real-world example — Hair-width scale measurements
A 70-milligram measurement (about the diameter of a human hair) is the kind of value materials engineers regularly express in adjacent micro-scale units like decigrams for direct comparison across supplier datasheets.
70 mg × 0.01 = 0.7 dg
Real-world example — Paper and film thicknesses
At the thickness of office paper (roughly 3 milligrams), converting between sub-millimeter units is routine for packaging and printing buyers comparing quotes from metric and US suppliers.
3 mg × 0.01 = 0.03 dg
Real-world example — Plastic-film thickness alternates
A 150-milligram plastic film converts cleanly to decigrams — useful for packaging buyers reconciling supplier datasheets across metric and US measurement systems.
150 mg × 0.01 = 1.5 dg
Milligram to Decigram conversion table
Standard reference values for converting milligrams to decigrams:
| Milligram [mg] | Decigram [dg] |
|---|---|
| 0.01 | 1e-4 |
| 0.1 | 0.001 |
| 1 | 0.01 |
| 2 | 0.02 |
| 3 | 0.03 |
| 4 | 0.04 |
| 5 | 0.05 |
| 10 | 0.1 |
| 20 | 0.2 |
| 30 | 0.3 |
| 40 | 0.4 |
| 50 | 0.5 |
| 100 | 1 |
| 500 | 5 |
| 1000 | 10 |
Frequently asked questions
How many decigrams is 1 milligram?
How do I convert milligrams to decigrams?
How do I convert decigrams back to milligrams?
How many decigrams is 100 milligrams?
Popular weight unit conversions
Convert Milligram to other weight units
Show all Milligram conversions
Metric / SI (17 units)
Avoirdupois (15 units)
Troy & Apothecary (10 units)
Indian / South Asian (6 units)
Scientific / Atomic (9 units)
Astronomical (4 units)
Biblical / Ancient (14 units)
Sources & references
Conversion factor (1 mg = 0.01 dg) verified against the following authoritative sources:
- BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
- NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
- NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
- NIST — Refinement of values for the yard and pound (Federal Register 1959)
The treaty (signed by US
- International Astronomical Union — System of Astronomical Constants
The IAU defines astronomical units including the AU (149597870700 m exactly) light-year and parsec used in astronomy and astrophysics.