Convert Picogram to Dram (avoirdupois)
Convert picograms to drams (avoirdupois) instantly. 1 picogram = 5.643834e-13 dram (avoirdupois) — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Dram (avoirdupois) to Picogram converter for the reverse conversion.
Units explained
Picogram
A picogram (pg) equals 10^-15 kilogram.
From the SI prefix 'pico-' (from Spanish 'pico', a small quantity).
Single-cell biology and ultratrace chemical analysis.
The pico- prefix entered the SI in 1960.
Dram (avoirdupois)
The avoirdupois dram (dr) equals one-sixteenth of an ounce, about 1.77 grams.
From Greek 'drachma' through Latin 'dragma'.
Historically pharmacy; today occasional cooking and firearms (powder) use.
Defined as 1/256 of the avoirdupois pound.
Picogram to Dram (avoirdupois) conversion formula
The relationship between picograms and drams (avoirdupois):
To convert picograms to drams (avoirdupois), multiply the value in picograms by 5.643834e-13. To reverse, multiply drams (avoirdupois) by 1.771845e+12.
How to use this converter
Type a value into the calculator. The result in drams (avoirdupois) updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Dram (avoirdupois) to Picogram converter for the reverse direction.
Step-by-step: convert picograms to drams (avoirdupois)
- Write down the value in picograms (pg).
- Multiply that value by the factor 5.643834e-13.
- The product is the equivalent value in drams (avoirdupois) (dr).
- To reverse, multiply the dram (avoirdupois) value by 1.771845e+12.
Worked examples
Example 1 — Convert 1 pg to dr:
1 × 5.643834e-13 = 5.643834e-13 dr
Example 2 — Convert 100 pg to dr:
100 × 5.643834e-13 = 5.643834e-11 dr
Real-world example — Sub-micron to millimeter
500,000 picograms converts to a small everyday quantity in drams (avoirdupois) — useful when relating optical-wavelength specifications to physical mounting hardware.
500000 pg × 5.643834e-13 = 2.821917e-7 dr
Real-world example — From wavelengths to millimeter-scale objects
A value of one million picograms sounds vast at the atomic scale but converts to a small everyday quantity in drams (avoirdupois) — useful when relating optical-wavelength specifications to physical mounting hardware.
1000000 pg × 5.643834e-13 = 5.643834e-7 dr
Picogram to Dram (avoirdupois) conversion table
Standard reference values for converting picograms to drams (avoirdupois):
| Picogram [pg] | Dram (avoirdupois) [dr] |
|---|---|
| 0.01 | 5.643834e-15 |
| 0.1 | 5.643834e-14 |
| 1 | 5.643834e-13 |
| 2 | 1.128767e-12 |
| 3 | 1.69315e-12 |
| 4 | 2.257534e-12 |
| 5 | 2.821917e-12 |
| 10 | 5.643834e-12 |
| 20 | 1.128767e-11 |
| 30 | 1.69315e-11 |
| 40 | 2.257534e-11 |
| 50 | 2.821917e-11 |
| 100 | 5.643834e-11 |
| 500 | 2.821917e-10 |
| 1000 | 5.643834e-10 |
Frequently asked questions
How many drams (avoirdupois) is 1 picogram?
How do I convert picograms to drams (avoirdupois)?
How do I convert drams (avoirdupois) back to picograms?
How many drams (avoirdupois) is 100 picograms?
Popular weight unit conversions
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Metric / SI (17 units)
Avoirdupois (15 units)
Troy & Apothecary (10 units)
Indian / South Asian (6 units)
Scientific / Atomic (9 units)
Astronomical (4 units)
Biblical / Ancient (14 units)
Sources & references
Conversion factor (1 pg = 5.643834e-13 dr) verified against the following authoritative sources:
- BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
- NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
- NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
- NIST — Refinement of values for the yard and pound (Federal Register 1959)
The treaty (signed by US
- International Astronomical Union — System of Astronomical Constants
The IAU defines astronomical units including the AU (149597870700 m exactly) light-year and parsec used in astronomy and astrophysics.