Mass and Weight · Unit Converter

Convert Gram to Troy Ounce

Convert grams to troy ounces instantly. 1 gram = 0.0321507466 troy ounce — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Troy Ounce to Gram converter for the reverse conversion.

Written by Sunith Babu L, Ph.D., Lead Engineer Reviewed by Dr. Ashok Kumar K, Ph.D.
Mass and Weight category 2 min read Published Last reviewed Updated

Units explained

Metric / SI

Gram

What is a gram?

The gram (g) equals one-thousandth of a kilogram.

Origin of the gram

From Late Latin 'gramma', a small weight or scruple.

Where it is used

The everyday metric unit for food, medicine, and small objects.

When and where it was developed

Defined in 1795 as the mass of one cubic centimeter of water at melting point.

Troy & Apothecary

Troy Ounce

What is a troy ounce?

The troy ounce (ozt) equals about 31.103 grams, one-twelfth of a troy pound.

Origin of the troy ounce

From the Troy system of weights associated with Troyes, France.

Where it is used

The global standard for pricing gold, silver, platinum, and palladium.

When and where it was developed

Established in the medieval Troy system and retained for precious metals.

Gram to Troy Ounce conversion formula

The relationship between grams and troy ounces:

1 g = 0.0321507466 oz t
1 oz t = 31.1034768 g

To convert grams to troy ounces, multiply the value in grams by 0.0321507466. To reverse, multiply troy ounces by 31.1034768.

How to use this converter

Type a value into the calculator. The result in troy ounces updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Troy Ounce to Gram converter for the reverse direction.

Step-by-step: convert grams to troy ounces

  1. Write down the value in grams (g).
  2. Multiply that value by the factor 0.0321507466.
  3. The product is the equivalent value in troy ounces (oz t).
  4. To reverse, multiply the troy ounce value by 31.1034768.

Worked examples

Example 1 — Convert 1 g to oz t:
1 × 0.0321507466 = 0.0321507466 oz t

Example 2 — Convert 100 g to oz t:
100 × 0.0321507466 = 3.2150746569 oz t

Real-world example — Ruler-scale measurements

A 30-gram school ruler converts cleanly to troy ounces — useful when buying a desk accessory from a retailer whose product specs use a different unit.

30 g × 0.0321507466 = 0.9645223971 oz t

Real-world example — Hardware-scale dimensions

A 10-gram fastener or component is about as long as a thumbnail. Mechanics and DIY enthusiasts convert between grams and troy ounces daily when mixing metric and imperial tools.

10 g × 0.0321507466 = 0.3215074657 oz t

Real-world example — Postcard and small-object dimensions

A postcard is about 5 grams wide. Converting to troy ounces is essential for international postal addressing forms that ask for dimensions in different units across countries.

5 g × 0.0321507466 = 0.1607537328 oz t

Gram to Troy Ounce conversion table

Standard reference values for converting grams to troy ounces:

Gram [g]Troy Ounce [oz t]
0.010.0003215075
0.10.0032150747
10.0321507466
20.0643014931
30.0964522397
40.1286029863
50.1607537328
100.3215074657
200.6430149314
300.9645223971
401.2860298627
501.6075373284
1003.2150746569
50016.0753732843
100032.1507465686

Frequently asked questions

How many troy ounces is 1 gram?
1 gram equals 0.0321507466 troy ounce.
How do I convert grams to troy ounces?
Multiply the value in grams by 0.0321507466 to get troy ounces.
How do I convert troy ounces back to grams?
Multiply the value in troy ounces by 31.1034768, or use the Troy Ounce to Gram converter.
How many troy ounces is 100 grams?
100 grams equals 3.2150746569 troy ounces, because 100 × 0.0321507466 = 3.2150746569.

Convert Gram to other weight units

Show all Gram conversions
Metric / SI (17 units)
Gram to Attogram (ag) Gram to Femtogram (fg) Gram to Picogram (pg) Gram to Nanogram (ng) Gram to Microgram (µg) Gram to Milligram (mg) Gram to Centigram (cg) Gram to Decigram (dg) Gram to Dekagram (dag) Gram to Hectogram (hg) Gram to Kilogram (kg) Gram to Quintal (metric) (q) Gram to Metric Ton (t) Gram to Gigagram (Gg) Gram to Teragram (Tg) Gram to Petagram (Pg) Gram to Exagram (Eg)
Avoirdupois (15 units)
Gram to Grain (gr) Gram to Dram (avoirdupois) (dr) Gram to Ounce (oz) Gram to Pound (lb) Gram to Clove (clove) Gram to Stone (US) (st) Gram to Stone (UK) (st) Gram to Quarter (US) (qr) Gram to Quarter (UK) (qr) Gram to Hundredweight (US) (cwt) Gram to Hundredweight (UK) (cwt) Gram to Wey (wey) Gram to Kilopound (kip) (kip) Gram to Ton (short, US) (sh tn) Gram to Ton (long, UK) (long tn)
Troy & Apothecary (10 units)
Gram to Point (1/100 carat) (pt) Gram to Carat (metric) (ct) Gram to Scruple (apothecary) (s ap) Gram to Pennyweight (dwt) Gram to Momme (mom) Gram to Mace (mace) Gram to Dram (apothecary/troy) (dr ap) Gram to Troy Ounce (oz t) Gram to Tael (tael) Gram to Pound (troy/apothecary) (lb t)
Indian / South Asian (6 units)
Gram to Ratti (ratti) Gram to Masha (masha) Gram to Tola (tola) Gram to Chittack (Chatank) (chittack) Gram to Seer (Ser) (seer) Gram to Maund (Mann) (maund)
Scientific / Atomic (9 units)
Gram to Electron Mass (rest) (me) Gram to MeV/c2 (MeV/c²) Gram to Muon Mass (mµ) Gram to Atomic Mass Unit (u) Gram to Proton Mass (mp) Gram to Neutron Mass (mn) Gram to Deuteron Mass (md) Gram to Carbon-12 Atom Mass (C-12) Gram to Planck Mass (mP)
Astronomical (4 units)
Gram to Lunar Mass (Moon) (M☾) Gram to Earth's Mass (M⊕) Gram to Jupiter Mass (MJ) Gram to Sun's Mass (M☉)
Biblical / Ancient (14 units)
Gram to Lepton (Biblical Roman) (lepton) Gram to Quadrans (Biblical Roman) (quadrans) Gram to Assarion (Biblical Roman) (assarion) Gram to Gerah (Biblical Hebrew) (gerah) Gram to Drachma (Biblical Greek) (drachma) Gram to Denarius (Biblical Roman) (denarius) Gram to Bekan (Biblical Hebrew) (bekah) Gram to Didrachma (Biblical Greek) (didrachma) Gram to Shekel (Biblical Hebrew) (shekel) Gram to Tetradrachma (Biblical Greek) (tetra) Gram to Mina (Biblical Greek) (mina) Gram to Mina (Biblical Hebrew) (mina) Gram to Talent (Biblical Greek) (talent) Gram to Talent (Biblical Hebrew) (talent)
Force / Engineering (5 units)
Gram to Poundal (pdl) Gram to Ton (assay) (US) (AT) Gram to Ton (assay) (UK) (AT) Gram to Kilogram-force square second/meter (hyl) Gram to Slug (slug)

Sources & references

Conversion factor (1 g = 0.0321507466 oz t) verified against the following authoritative sources:

Results are provided for general reference. Verify critical measurements against an authoritative standard.