Convert Picoliter (pL) to Dram (dr) instantly.
About these units
Picoliter (pL)
A picoliter is 10⁻¹² liters, bridging the gap between femtoliters and nanoliters. Many biological cells—such as yeast—have volumes in the picoliter range. This makes the unit particularly important in cell biology, single-cell genomics, and droplet microfluidics. Inkjet printers famously eject droplets on the order of a few picoliters, illustrating a precise and widespread technological use. This droplet size affects print resolution, color quality, and material deposition accuracy. The picoliter is also used in chemical analysis, micro-sampling, and lab-on-chip devices, where controlling tiny fluid quantities is essential for efficiency and precision.
Dram (dr)
The fluid dram is a small historical unit equal to 1/8 of a US fluid ounce or 3.6967 mL (US), with slightly different imperial values. It originated in apothecaries and early pharmaceutical texts, where drams measured potent liquid medicines, tinctures, and extracts. In daily life, drams appeared in old cocktail recipes, medicinal syrups, and household remedies. However, the inconsistency between US and UK drams, along with the rise of the metric system, pushed it out of modern use. Today, the dram survives mostly in whiskey culture—where a "dram" informally means a small pour, not a precise measurement—and in historical studies of medicine.