Convert Troy Ounce to Exagram
Convert troy ounces to exagrams instantly. 1 troy ounce = 3.110348e-17 exagram — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Exagram to Troy Ounce converter for the reverse conversion.
Units explained
Troy Ounce
The troy ounce (ozt) equals about 31.103 grams, one-twelfth of a troy pound.
From the Troy system of weights associated with Troyes, France.
The global standard for pricing gold, silver, platinum, and palladium.
Established in the medieval Troy system and retained for precious metals.
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.
Troy Ounce to Exagram conversion formula
The relationship between troy ounces and exagrams:
To convert troy ounces to exagrams, multiply the value in troy ounces by 3.110348e-17. To reverse, multiply exagrams by 3.215075e+16.
How to use this converter
Type a value into the calculator. The result in exagrams updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Exagram to Troy Ounce converter for the reverse direction.
Step-by-step: convert troy ounces to exagrams
- Write down the value in troy ounces (oz t).
- Multiply that value by the factor 3.110348e-17.
- The product is the equivalent value in exagrams (Eg).
- To reverse, multiply the exagram value by 3.215075e+16.
Worked examples
Example 1 — Convert 1 oz t to Eg:
1 × 3.110348e-17 = 3.110348e-17 Eg
Example 2 — Convert 100 oz t to Eg:
100 × 3.110348e-17 = 3.110348e-15 Eg
Real-world example — Ruler-scale measurements
A 30-troy ounce school ruler converts cleanly to exagrams — useful when buying a desk accessory from a retailer whose product specs use a different unit.
30 oz t × 3.110348e-17 = 9.331043e-16 Eg
Real-world example — Hardware-scale dimensions
A 10-troy ounce fastener or component is about as long as a thumbnail. Mechanics and DIY enthusiasts convert between troy ounces and exagrams daily when mixing metric and imperial tools.
10 oz t × 3.110348e-17 = 3.110348e-16 Eg
Real-world example — Postcard and small-object dimensions
A postcard is about 5 troy ounces wide. Converting to exagrams is essential for international postal addressing forms that ask for dimensions in different units across countries.
5 oz t × 3.110348e-17 = 1.555174e-16 Eg
Troy Ounce to Exagram conversion table
Standard reference values for converting troy ounces to exagrams:
| Troy Ounce [oz t] | Exagram [Eg] |
|---|---|
| 0.01 | 3.110348e-19 |
| 0.1 | 3.110348e-18 |
| 1 | 3.110348e-17 |
| 2 | 6.220695e-17 |
| 3 | 9.331043e-17 |
| 4 | 1.244139e-16 |
| 5 | 1.555174e-16 |
| 10 | 3.110348e-16 |
| 20 | 6.220695e-16 |
| 30 | 9.331043e-16 |
| 40 | 1.244139e-15 |
| 50 | 1.555174e-15 |
| 100 | 3.110348e-15 |
| 500 | 1.555174e-14 |
| 1000 | 3.110348e-14 |
Frequently asked questions
How many exagrams is 1 troy ounce?
How do I convert troy ounces to exagrams?
How do I convert exagrams back to troy ounces?
How many exagrams is 100 troy ounces?
Popular weight unit conversions
Convert Troy Ounce to other weight units
Show all Troy Ounce conversions
Metric / SI (18 units)
Avoirdupois (15 units)
Troy & Apothecary (9 units)
Indian / South Asian (6 units)
Scientific / Atomic (9 units)
Astronomical (4 units)
Biblical / Ancient (14 units)
Sources & references
Conversion factor (1 oz t = 3.110348e-17 Eg) 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.