# Nanograms to Pennyweights (ng to dwt)

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

**1 ng = 6.4301493137256E-10 dwt**

One nanogram equals approximately a tiny fraction of one pennyweights. The nanogram at one billionth of a gram measures forensic DNA traces and environmental pollutants, while the pennyweights at ~1.555 grams serves the precious metals trade. ~1.555 x 106 nanograms make one pennyweights.

## Formula

Apply the conversion factor

## Conversion Table

| Nanograms (ng) | Pennyweights (dwt) |
|---|---|
| 100000000 ng | 0.064301493137256 dwt |
| 500000000 ng | 0.32150746568628 dwt |
| 1000000000 ng | 0.64301493137256 dwt |
| 5000000000 ng | 3.2150746568628 dwt |
| 10000000000 ng | 6.4301493137256 dwt |
| 50000000000 ng | 32.150746568628 dwt |
| 100000000000 ng | 64.301493137256 dwt |
| 500000000000 ng | 321.50746568628 dwt |

## Units

### Nanogram (ng)

A nanogram is one billionth of a gram and one trillionth of a kilogram. Used in medical diagnostics for hormone levels and drug testing.

### 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 is primarily theoretical, connecting forensic analytical science with a very different measurement domain. The enormous ratio between them reflects how far apart these measurement worlds operate.

## Good to Know

The nanogram and the pennyweights represent measurement worlds separated by enormous scale and entirely different professional communities. The nanogram belongs to forensic laboratories and analytical chemists who detect traces invisible to any human sense. The pennyweights belongs to specialized measurement where quantities are tangible and visible. Their conversion exists to complete the mathematical grid connecting all weight units, not because anyone needs to traverse such an extreme ratio in practice.

## FAQ

### How many nanograms are in one pennyweights?

About 1.555 million nanograms make one pennyweight.

### Is this conversion exact?

Approximately. Cross-system conversions between metric and Imperial/troy/FPS units produce non-terminating decimals.

### Where is the nanogram used in practice?

In forensic DNA profiling (nanogram DNA samples), anti-doping testing (nanograms per milliliter), environmental monitoring (nanograms per liter of water), and pharmacokinetics (measuring drug blood levels).

## Non-Frequently Asked Questions

### How does a nanogram compare to a pennyweights?

About 1.555 million nanograms make one pennyweight. A nanogram of gold is worth about 0.0000064 cents. You need 1.555 million of them before a jeweler will even weigh your gold.

### Is the nanogram-to-pennyweights conversion useful?

Gold assayers detect trace gold at nanogram levels and report commercially significant quantities in pennyweights. This conversion bridges the assay lab and the gold counter.

### At what nanogram concentration does gold in ore become worth mining?

Gold ore typically becomes economically viable at around 1 to 3 grams per metric ton, which translates to about 1,000 to 3,000 nanograms per gram of rock. Below 1,000 nanograms per gram, the gold is usually too sparse to justify the mining and processing costs.

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## See Also

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