Petagram to Nanogram

The nanogram is a unit of mass equal to 10⁻⁹ grams or 10⁻¹² kilograms — one billionth of a gram.

1 ng = 10⁻⁹ g = 10⁻¹² kg = 1,000 pg = 0.001 µg.

To convert ng to µg: divide by 1,000. To convert ng to grams: multiply by 10⁻⁹.

Drug dosing in ng/mL (blood levels), pesticide residue testing, and pollution monitoring (e.g., dioxin levels).

Many potent drugs are effective at blood concentrations of just a few ng/mL — a testament to how sensitive your body is.

Confusing ng/mL with µg/mL — a factor of 1,000 difference that can cause dangerous dosing errors in medicine.

Drug levels in blood are often in ng/mL — if someone says 'nanograms per milliliter', think trace-level drug monitoring.