# Milligrams to Pennyweights (mg to dwt)

Source: https://www.unitconvertercalculator.com/weight/milligrams-to-pennyweights/

**1 mg = 0.00064301493137256 dwt**

One milligram equals approximately 0.000643 pennyweights. The milligram at one thousandth of a gram serves pharmacy and nutrition, while the pennyweight at about 1.555 grams serves the precious metals trade. About 1,555 milligrams make one pennyweight - connecting medicine cabinets with jewelry counters.

## Formula

Apply the conversion factor

## Conversion Table

| Milligrams (mg) | Pennyweights (dwt) |
|---|---|
| 100 mg | 0.064301493137256 dwt |
| 500 mg | 0.32150746568628 dwt |
| 1000 mg | 0.64301493137256 dwt |
| 5000 mg | 3.2150746568628 dwt |
| 10000 mg | 6.4301493137256 dwt |
| 50000 mg | 32.150746568628 dwt |
| 100000 mg | 64.301493137256 dwt |
| 500000 mg | 321.50746568628 dwt |
| 1000000 mg | 643.01493137256 dwt |
| 5000000 mg | 3215.0746568628 dwt |

## Units

### Milligram (mg)

A metric unit of mass equal to one thousandth of a gram, or one millionth of a kilogram. Commonly used in medicine and pharmacology.

### Pennyweight (dwt)

A pennyweight is a unit of mass equal to 24 grains or 1/20 of a troy ounce (1.55517384 grams). Used in the jewelry trade for weighing precious metals.

## Background

This conversion occasionally arises when tiny gold or silver items are weighed on milligram-precision lab scales and the result needs to be expressed in the jeweler's pennyweight system. Gold assayers and analytical chemists working with trace precious metals use this conversion when translating lab results into commercial units.

## Good to Know

The milligram and the pennyweight serve parallel precision communities that rarely interact. The milligram world is pharmaceutical - white coats, sterile labs, mass spectrometers. The pennyweight world is artisanal - jeweler's loupes, velvet trays, hand scales. Both communities value precision, but for different reasons: the pharmacist to protect life, the jeweler to protect value.

## FAQ

### How many milligrams are in one pennyweight?

Approximately 1,555.2 milligrams. One pennyweight is about 1.55517 grams, and each gram is 1,000 milligrams, giving about 1,555.

### Is this conversion used in the jewelry industry?

Occasionally, when precision lab equipment measures small gold items in milligrams and the weight must be reported in pennyweights for pricing.

### Why is this approximate?

Because the pennyweight belongs to the troy system and the milligram to the metric system. The cross-system grain-to-gram conversion factor produces a non-terminating decimal.

## Non-Frequently Asked Questions

### How many milligrams of gold are in a wedding band?

A typical gold wedding band weighs 3 to 5 pennyweights, or roughly 4,665 to 7,776 milligrams of gold. At current prices, that is about $300 to $500 worth of gold - plus whatever the jeweler charges for craftsmanship, which is usually more than the gold itself.

### Could a pharmacist weigh a pennyweight of gold?

Yes - pharmacy scales that resolve to milligrams can easily measure 1,555 milligrams. In fact, pharmaceutical balances are more precise than most jeweler's scales. A pharmacist could weigh gold more accurately than a jeweler, though they would have no idea how to price it.

### Is the pennyweight the most romantic unit that connects to the milligram?

The carat is more romantic (engagement rings), but the pennyweight has its charm - it echoes medieval English pennies and centuries of goldsmithing tradition. Converting from the clinical milligram to the historical pennyweight is like translating a lab report into a love letter.

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## See Also

- [Pennyweights to Milligrams](https://www.unitconvertercalculator.com/weight/pennyweights-to-milligrams/)