Convert Exagram to Dram (apothecary/troy)
Convert exagrams to drams (apothecary/troy) instantly. 1 exagram = 2.57206e+17 dram (apothecary/troy) — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Dram (apothecary/troy) to Exagram converter for the reverse conversion.
Units explained
Exagram
An exagram (Eg) equals 10^15 kilograms, or one quintillion grams.
From the SI prefix 'exa-' (from Greek 'hex', six, denoting the sixth power of 1000).
Confined to planetary- and atmospheric-scale mass discussions; never used in daily measurement.
The exa- prefix was adopted by the General Conference on Weights and Measures (CGPM) in 1975.
Dram (apothecary/troy)
The apothecary (troy) dram equals one-eighth of a troy ounce, about 3.888 grams.
From the apothecaries' system rooted in the Greek 'drachma'.
Historical pharmacy and medicine compounding.
Part of the apothecaries' system of weights used through the 19th century.
Exagram to Dram (apothecary/troy) conversion formula
The relationship between exagrams and drams (apothecary/troy):
To convert exagrams to drams (apothecary/troy), multiply the value in exagrams by 2.57206e+17. To reverse, multiply drams (apothecary/troy) by 3.887935e-18.
How to use this converter
Type a value into the calculator. The result in drams (apothecary/troy) 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 (apothecary/troy) to Exagram converter for the reverse direction.
Step-by-step: convert exagrams to drams (apothecary/troy)
- Write down the value in exagrams (Eg).
- Multiply that value by the factor 2.57206e+17.
- The product is the equivalent value in drams (apothecary/troy) (dr ap).
- To reverse, multiply the dram (apothecary/troy) value by 3.887935e-18.
Worked examples
Example 1 — Convert 1 Eg to dr ap:
1 × 2.57206e+17 = 2.57206e+17 dr ap
Example 2 — Convert 100 Eg to dr ap:
100 × 2.57206e+17 = 2.57206e+19 dr ap
Exagram to Dram (apothecary/troy) conversion table
Standard reference values for converting exagrams to drams (apothecary/troy):
| Exagram [Eg] | Dram (apothecary/troy) [dr ap] |
|---|---|
| 0.01 | 2.57206e+15 |
| 0.1 | 2.57206e+16 |
| 1 | 2.57206e+17 |
| 2 | 5.144119e+17 |
| 3 | 7.716179e+17 |
| 4 | 1.028824e+18 |
| 5 | 1.28603e+18 |
| 10 | 2.57206e+18 |
| 20 | 5.144119e+18 |
| 30 | 7.716179e+18 |
| 40 | 1.028824e+19 |
| 50 | 1.28603e+19 |
| 100 | 2.57206e+19 |
| 500 | 1.28603e+20 |
| 1000 | 2.57206e+20 |
Frequently asked questions
How many drams (apothecary/troy) is 1 exagram?
How do I convert exagrams to drams (apothecary/troy)?
How do I convert drams (apothecary/troy) back to exagrams?
How many drams (apothecary/troy) is 100 exagrams?
Popular weight unit conversions
Convert Exagram to other weight units
Show all Exagram conversions
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 Eg = 2.57206e+17 dr ap) 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.