Convert Grain to Troy ounce
1 grain = 0.002083333 troy ounce (oz t). For example, 10 grain = 0.02083333 troy ounce and 100 grain = 0.2083333 troy ounce. Type any value below to convert grain to troy ounce both ways — it runs entirely in your browser.
Quick answer: Grain to Troy ounce
1 Grain = 0.002083333 Troy ounce (gr → oz t). To convert grain to troy ounce, multiply by 0.002083333. To convert troy ounce to grain, multiply by 480. The converter at the top does this instantly and both ways; the sections below give the formula, worked examples, a full conversion chart and answers to the most common grain-to-troy ounce questions.
How to convert Grain to Troy ounce
To convert grain to troy ounce, multiply the number of grain by the conversion factor 0.002083333, because 1 gr = 0.002083333 oz t. The conversion is linear, so the same factor works for any value — whole numbers, decimals or fractions. For the reverse direction, 1 oz t = 480 gr, so you divide by 0.002083333 (or multiply by 480) to turn troy ounce back into grain.
oz t = gr × 0.002083333 ·
gr = oz t × 480
- Write down the value you want to convert, in grain.
- Multiply it by 0.002083333.
- The result is the same area/length/quantity expressed in troy ounce.
Grain to Troy ounce — worked examples
Each row shows the exact arithmetic so you can follow the conversion step by step. For example, 5 grain is 0.01041667 troy ounce because 5 gr × 0.002083333 = 0.01041667 oz t.
| Grain | Calculation | Troy ounce |
|---|---|---|
| 1 gr | 1 gr × 0.002083333 = 0.002083333 oz t | 0.002083333 oz t |
| 2 gr | 2 gr × 0.002083333 = 0.004166667 oz t | 0.004166667 oz t |
| 3 gr | 3 gr × 0.002083333 = 0.00625 oz t | 0.00625 oz t |
| 5 gr | 5 gr × 0.002083333 = 0.01041667 oz t | 0.01041667 oz t |
| 7 gr | 7 gr × 0.002083333 = 0.01458333 oz t | 0.01458333 oz t |
| 10 gr | 10 gr × 0.002083333 = 0.02083333 oz t | 0.02083333 oz t |
| 12 gr | 12 gr × 0.002083333 = 0.025 oz t | 0.025 oz t |
| 15 gr | 15 gr × 0.002083333 = 0.03125 oz t | 0.03125 oz t |
| 20 gr | 20 gr × 0.002083333 = 0.04166667 oz t | 0.04166667 oz t |
| 25 gr | 25 gr × 0.002083333 = 0.05208333 oz t | 0.05208333 oz t |
| 50 gr | 50 gr × 0.002083333 = 0.1041667 oz t | 0.1041667 oz t |
| 100 gr | 100 gr × 0.002083333 = 0.2083333 oz t | 0.2083333 oz t |
Common Grain to Troy ounce conversions
These are the grain-to-troy ounce values people look up most often. Every figure is computed from the exact factor, so you can rely on them for quick reference:
- 1 grain = 0.002083333 troy ounce
- 2 grain = 0.004166667 troy ounce
- 2.5 grain = 0.005208333 troy ounce
- 3 grain = 0.00625 troy ounce
- 4 grain = 0.008333333 troy ounce
- 5 grain = 0.01041667 troy ounce
- 6 grain = 0.0125 troy ounce
- 7 grain = 0.01458333 troy ounce
- 8 grain = 0.01666667 troy ounce
- 9 grain = 0.01875 troy ounce
- 10 grain = 0.02083333 troy ounce
- 12 grain = 0.025 troy ounce
- 15 grain = 0.03125 troy ounce
- 20 grain = 0.04166667 troy ounce
- 25 grain = 0.05208333 troy ounce
- 30 grain = 0.0625 troy ounce
- 50 grain = 0.1041667 troy ounce
- 75 grain = 0.15625 troy ounce
- 100 grain = 0.2083333 troy ounce
- 200 grain = 0.4166667 troy ounce
- 500 grain = 1.041667 troy ounce
- 1000 grain = 2.083333 troy ounce
Grain to Troy ounce conversion chart (both directions)
The chart below converts grain to troy ounce and troy ounce to grain side by side, so it works whichever way you need. 1 grain = 0.002083333 troy ounce, and 1 troy ounce = 480 grain.
| Grain → Troy ounce | Troy ounce → Grain |
|---|---|
| 0.25 gr = 0.0005208333 oz t | 0.25 oz t = 120 gr |
| 0.5 gr = 0.001041667 oz t | 0.5 oz t = 240 gr |
| 1 gr = 0.002083333 oz t | 1 oz t = 480 gr |
| 2 gr = 0.004166667 oz t | 2 oz t = 960 gr |
| 3 gr = 0.00625 oz t | 3 oz t = 1,440 gr |
| 4 gr = 0.008333333 oz t | 4 oz t = 1,920 gr |
| 5 gr = 0.01041667 oz t | 5 oz t = 2,400 gr |
| 6 gr = 0.0125 oz t | 6 oz t = 2,880 gr |
| 7 gr = 0.01458333 oz t | 7 oz t = 3,360 gr |
| 8 gr = 0.01666667 oz t | 8 oz t = 3,840 gr |
| 9 gr = 0.01875 oz t | 9 oz t = 4,320 gr |
| 10 gr = 0.02083333 oz t | 10 oz t = 4,800 gr |
| 12 gr = 0.025 oz t | 12 oz t = 5,760 gr |
| 15 gr = 0.03125 oz t | 15 oz t = 7,200 gr |
| 20 gr = 0.04166667 oz t | 20 oz t = 9,600 gr |
| 25 gr = 0.05208333 oz t | 25 oz t = 12,000 gr |
| 30 gr = 0.0625 oz t | 30 oz t = 14,400 gr |
| 40 gr = 0.08333333 oz t | 40 oz t = 19,200 gr |
| 50 gr = 0.1041667 oz t | 50 oz t = 24,000 gr |
| 75 gr = 0.15625 oz t | 75 oz t = 36,000 gr |
| 100 gr = 0.2083333 oz t | 100 oz t = 48,000 gr |
| 150 gr = 0.3125 oz t | 150 oz t = 72,000 gr |
| 200 gr = 0.4166667 oz t | 200 oz t = 96,000 gr |
| 250 gr = 0.5208333 oz t | 250 oz t = 120,000 gr |
| 500 gr = 1.041667 oz t | 500 oz t = 240,000 gr |
| 1000 gr = 2.083333 oz t | 1000 oz t = 480,000 gr |
Grain vs Troy ounce: which is bigger?
A troy ounce is the larger unit: one troy ounce equals 480 grains. Put another way, you need 480 grains to make a single troy ounce.
What is a Grain? History, origin and usage
The grain is the oldest English weight still in use and the most literal: it began as the mass of a single grain of barley taken from the middle of the ear. Because it was the common building block, both surviving English weight systems were defined on it — 7,000 grains to the avoirdupois pound used for goods, and 5,760 to the troy pound used for precious metals.
The grain lives on in firearms and archery, where bullet, powder and arrow weights are given in grains, and in a few pharmaceutical contexts where older prescriptions were written that way. Precious-metal assayers still meet it through the troy system.
The grain is the one unit shared identically by the avoirdupois, troy and apothecaries' systems, which is exactly why it can be used to convert cleanly between them. It is also the reason a pound contains the odd-looking 7,000 of something rather than a round metric figure.
What is a Troy ounce? History, origin and usage
The troy ounce is named after Troyes, a town in the Champagne region of France whose medieval trade fairs drew merchants from across Europe and whose weight standards travelled home with them. The troy system was kept for precious metals and gemstones when England reorganised everything else around avoirdupois weights, and it has survived in that role ever since.
Gold, silver, platinum and palladium are priced per troy ounce on every major bullion market, so the "gold price" quoted in the news is a price per troy ounce. Jewellers and mints work in it, and coins such as the Krugerrand and the American Eagle are struck to contain exactly one troy ounce of fine metal.
A troy ounce is heavier than the ordinary ounce — 480 grains against 437.5 — so buying "an ounce of gold" gets you about ten per cent more metal than an ounce of anything else. The troy pound is stranger still: it contains twelve troy ounces, not sixteen, and is therefore lighter than the ordinary pound.
Convert 1 Grain to other units
It can help to see a grain next to the other units it is commonly compared with. One grain (gr) is equal to:
| 1 Grain equals | Unit |
|---|---|
| 0.00006479891 kg | Kilogram |
| 0.06479891 g | Gram |
| 64.79891 mg | Milligram |
| 64,798.91 µg | Microgram |
| 0.00000006479891 t | Tonne |
| 0.0000006479891 q | Quintal |
| 0.0001428571 lb | Pound |
| 0.002285714 oz | Ounce |
| 0.00001020408 st | Stone |
| 0.00000007142857 ton (US) | Short ton |
| 0.00000006377551 ton (UK) | Long ton |
| 0.002083333 oz t | Troy ounce |
| 0.3239945 ct | Carat |
Convert 1 Troy ounce to other units
One troy ounce (oz t) is equal to:
| 1 Troy ounce equals | Unit |
|---|---|
| 0.03110348 kg | Kilogram |
| 31.10348 g | Gram |
| 31,103.48 mg | Milligram |
| 31,103,480 µg | Microgram |
| 0.00003110348 t | Tonne |
| 0.0003110348 q | Quintal |
| 0.06857143 lb | Pound |
| 1.097143 oz | Ounce |
| 0.004897959 st | Stone |
| 0.00003428571 ton (US) | Short ton |
| 0.00003061224 ton (UK) | Long ton |
| 480 gr | Grain |
| 155.5174 ct | Carat |
Tips for converting Grain to Troy ounce
- To go from grain to troy ounce, multiply by 0.002083333; to go back, divide by 0.002083333 (or multiply by 480).
- For a quick mental estimate, remember that 1 grain ≈ 0.002083333 troy ounce, so 10 grain ≈ 0.02083333 troy ounce.
- The converter above keeps full precision; the tables round for readability, so use the tool for exact figures.
- Both fields update live as you type — change either side to convert in that direction.
How to use this Grain to Troy ounce converter
Type a number into the Grain field and the equivalent in Troy ounce appears instantly — there is no “convert” button to press and nothing is sent to a server, so it works offline once the page has loaded and is safe for any data. You can also type into the Troy ounce field to convert the other way (troy ounce to grain). Use the swap control to flip the two units, and copy the result with a single click. Because the calculation runs in your browser with full floating-point precision, the converter is more exact than the rounded figures shown in the reference chart above — use the chart for quick look-ups and the tool for precise work.
Accuracy and method
Every figure on this page — the formula, the worked examples, the conversion chart and the “convert to other units” tables — is computed from a single verified conversion factor (1 gr = 0.002083333 oz t), never copied from a hand-typed lookup table that could drift. That factor is derived from each unit’s definition in terms of a common base unit, and an automated check re-verifies all of the site’s factors on every update, so the numbers here stay correct over time. This matters for grain-to-troy ounce conversions because a small rounding error in a published table compounds quickly at larger quantities; computing from the exact factor avoids that.
Sources
- NIST Special Publication 811 — Guide for the Use of the SI — publishes the exact metric equivalents of the customary weight units. The 1959 international yard-and-pound agreement fixes the international avoirdupois pound at exactly 0.453 592 37 kilogram, and the ounce, stone, grain and both tons are defined as exact fractions or multiples of that pound — so every imperial weight on this page is exact, not rounded.
- BIPM — The International System of Units (SI Brochure) — the defining document for the SI, published by the International Bureau of Weights and Measures. It fixes the base unit that this conversion resolves to, which is why the factor here can be exact rather than approximate.
Weight factors here are exact, anchored to the kilogram: the international pound is exactly 0.45359237 kg, a stone is 14 pounds, a short ton is 2,000 pounds and a long ton is 2,240, a grain is 1/7000 of a pound and a metric carat is exactly 200 mg. So the live tool and every number on this page always agree.
Frequently asked questions
- How many troy ounce are in 1 grain?
- 1 grain = 0.002083333 troy ounce (oz t). To convert any number of grain to troy ounce, multiply by 0.002083333.
- How do I convert grain to troy ounce?
- Multiply the number of grain by 0.002083333. For example, 10 grain = 10 × 0.002083333 = 0.02083333 troy ounce, and 25 grain = 0.05208333 troy ounce.
- How many grain are in 1 troy ounce?
- 1 troy ounce = 480 grain. So to convert troy ounce back to grain, multiply by 480.
- What is the formula to convert grain to troy ounce?
- troy ounce = grain × 0.002083333. The reverse formula is grain = troy ounce × 480.
- How much is 100 grain in troy ounce?
- 100 grain = 0.2083333 troy ounce. (And 1000 grain = 2.083333 troy ounce.)
- Which is bigger, a grain or a troy ounce?
- A troy ounce is larger: 1 troy ounce = 480 grain.
- Is this grain to troy ounce converter accurate?
- Yes — every value is computed from the exact 0.002083333 oz t per gr factor (not rounded look-up tables), and the factors are re-verified automatically on every update.
- Can I convert troy ounce to grain too?
- Yes. The converter works both ways — enter a value in either field. 1 troy ounce = 480 grain.