Convert Exagram to Grain
Convert exagrams to grains instantly. 1 exagram = 1.543236e+19 grain — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Grain 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.
Grain
The grain (gr) equals 1/7000 of an avoirdupois pound, about 64.8 milligrams.
Based on the nominal mass of a single barley grain.
Ammunition and bullet mass, archery, and historical pharmacy.
Standardized through the English avoirdupois system and retained in 1959.
Exagram to Grain conversion formula
The relationship between exagrams and grains:
To convert exagrams to grains, multiply the value in exagrams by 1.543236e+19. To reverse, multiply grains by 6.47989e-20.
How to use this converter
Type a value into the calculator. The result in grains updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Grain to Exagram converter for the reverse direction.
Step-by-step: convert exagrams to grains
- Write down the value in exagrams (Eg).
- Multiply that value by the factor 1.543236e+19.
- The product is the equivalent value in grains (gr).
- To reverse, multiply the grain value by 6.47989e-20.
Worked examples
Example 1 — Convert 1 Eg to gr:
1 × 1.543236e+19 = 1.543236e+19 gr
Example 2 — Convert 100 Eg to gr:
100 × 1.543236e+19 = 1.543236e+21 gr
Exagram to Grain conversion table
Standard reference values for converting exagrams to grains:
| Exagram [Eg] | Grain [gr] |
|---|---|
| 0.01 | 1.543236e+17 |
| 0.1 | 1.543236e+18 |
| 1 | 1.543236e+19 |
| 2 | 3.086472e+19 |
| 3 | 4.629708e+19 |
| 4 | 6.172944e+19 |
| 5 | 7.71618e+19 |
| 10 | 1.543236e+20 |
| 20 | 3.086472e+20 |
| 30 | 4.629708e+20 |
| 40 | 6.172944e+20 |
| 50 | 7.71618e+20 |
| 100 | 1.543236e+21 |
| 500 | 7.71618e+21 |
| 1000 | 1.543236e+22 |
Frequently asked questions
How many grains is 1 exagram?
How do I convert exagrams to grains?
How do I convert grains back to exagrams?
How many grains 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 = 1.543236e+19 gr) 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.