Milligram to Pennyweight Converter
Convert Milligram (mg) to Pennyweight (dwt) instantly. 1 mg = 0.000643 dwt.
Mass Converter
26 units available
1 mg = 0.000643 dwt
Formula:
dwt = mg × 0.0006430149With your value: 1 mg = 0.00064301 dwt
How big is that?
Everyday references on a logarithmic scale, all expressed in milligram so you can sanity-check the result.
Other Milligram to Pennyweight conversions
Milligram to Pennyweight Conversion Table
| Milligram (mg) | Pennyweight (dwt) |
|---|---|
| 0.5 | 0.000322 |
| 1 | 0.000643 |
| 2 | 0.001286 |
| 5 | 0.003215 |
| 10 | 0.00643 |
| 15 | 0.009645 |
| 20 | 0.01286 |
| 25 | 0.016075 |
| 50 | 0.032151 |
| 100 | 0.064301 |
| 250 | 0.160754 |
| 500 | 0.321507 |
| 1000 | 0.643015 |
Pennyweight to Milligram Conversion Table
| Pennyweight (dwt) | Milligram (mg) |
|---|---|
| 0.5 | 777.58692 |
| 1 | 1,555.17384 |
| 2 | 3,110.34768 |
| 5 | 7,775.8692 |
| 10 | 15,551.7384 |
| 15 | 23,327.6076 |
| 20 | 31,103.4768 |
| 25 | 38,879.346 |
| 50 | 77,758.692 |
| 100 | 155,517.384 |
| 250 | 388,793.46 |
| 500 | 777,586.92 |
| 1000 | 1,555,173.84 |
Where these values come from
Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.
Milligram (mg)
Mass
Traceable to the kilogram, defined by fixing the Planck constant at 6.626 070 15 × 10⁻³⁴ J·s. Avoirdupois masses derive from the 1959 international pound (0.453 592 37 kg exactly).
Source: BIPM, The International System of Units (SI), 9th edition, 2019 (updated 2024)
Bureau International des Poids et Mesures · Reviewed 2026-07-01
Pennyweight (dwt)
Mass
Traceable to the kilogram, defined by fixing the Planck constant at 6.626 070 15 × 10⁻³⁴ J·s. Avoirdupois masses derive from the 1959 international pound (0.453 592 37 kg exactly).
Source: BIPM, The International System of Units (SI), 9th edition, 2019 (updated 2024)
Bureau International des Poids et Mesures · Reviewed 2026-07-01
How to Convert Milligram to Pennyweight
To convert from Milligram (mg) to Pennyweight (dwt), multiply the value by 0.0006430149.
Formula: dwt = mg × 0.0006430149
Reverse: mg = dwt × 1,555.17384
Step-by-Step Example
- Start with your value in Milligram. For example: 5 mg
- Multiply by the conversion factor: 5 x 0.0006430149
- The result is: 0.003215 dwt
About Milligram
The milligram equals one thousandth of a gram and is the standard unit for drug dosage and nutrient quantities.
Common uses: medication dosage, nutrition labels, laboratory work.
About Pennyweight
The pennyweight (dwt) equals 1/20 of a troy ounce, about 1.555 grams. Jewellers still price scrap gold by the pennyweight.
Common uses: jewellery trade, gold scrap, assaying.
Frequently Asked Questions
How many Pennyweight are in 1 Milligram?
There are exactly 0.0006430149 Pennyweight in 1 Milligram. This means the conversion factor from Milligram to Pennyweight is 0.0006430149.
What is the formula to convert Milligram to Pennyweight?
The formula to convert Milligram to Pennyweight is: dwt = mg × 0.0006430149. For example, to convert 10 Milligram to Pennyweight, you would multiply 10 by 0.0006430149.
What is a Milligram?
The milligram equals one thousandth of a gram and is the standard unit for drug dosage and nutrient quantities.
What is a Pennyweight?
The pennyweight (dwt) equals 1/20 of a troy ounce, about 1.555 grams. Jewellers still price scrap gold by the pennyweight.
What are the common uses of Milligram?
The Milligram is commonly used in medication dosage, nutrition labels, laboratory work.
Related Mass Conversions
Cite this page
UnitConvertLab. (2026). Milligram to Pennyweight converter. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/milligram-to-pennyweight