Convert Pound to Grain
1 pound = 7,000 grain (gr). For example, 10 pound = 70,000 grain and 100 pound = 700,000 grain. Type any value below to convert pound to grain both ways — it runs entirely in your browser.
Quick answer: Pound to Grain
1 Pound = 7,000 Grain (lb → gr). To convert pound to grain, multiply by 7,000. To convert grain to pound, multiply by 0.0001428571. 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 pound-to-grain questions.
How to convert Pound to Grain
To convert pound to grain, multiply the number of pound by the conversion factor 7,000, because 1 lb = 7,000 gr. The conversion is linear, so the same factor works for any value — whole numbers, decimals or fractions. For the reverse direction, 1 gr = 0.0001428571 lb, so you divide by 7,000 (or multiply by 0.0001428571) to turn grain back into pound.
gr = lb × 7,000 ·
lb = gr × 0.0001428571
- Write down the value you want to convert, in pound.
- Multiply it by 7,000.
- The result is the same area/length/quantity expressed in grain.
Pound to Grain — worked examples
Each row shows the exact arithmetic so you can follow the conversion step by step. For example, 5 pound is 35,000 grain because 5 lb × 7,000 = 35,000 gr.
| Pound | Calculation | Grain |
|---|---|---|
| 1 lb | 1 lb × 7,000 = 7,000 gr | 7,000 gr |
| 2 lb | 2 lb × 7,000 = 14,000 gr | 14,000 gr |
| 3 lb | 3 lb × 7,000 = 21,000 gr | 21,000 gr |
| 5 lb | 5 lb × 7,000 = 35,000 gr | 35,000 gr |
| 7 lb | 7 lb × 7,000 = 49,000 gr | 49,000 gr |
| 10 lb | 10 lb × 7,000 = 70,000 gr | 70,000 gr |
| 12 lb | 12 lb × 7,000 = 84,000 gr | 84,000 gr |
| 15 lb | 15 lb × 7,000 = 105,000 gr | 105,000 gr |
| 20 lb | 20 lb × 7,000 = 140,000 gr | 140,000 gr |
| 25 lb | 25 lb × 7,000 = 175,000 gr | 175,000 gr |
| 50 lb | 50 lb × 7,000 = 350,000 gr | 350,000 gr |
| 100 lb | 100 lb × 7,000 = 700,000 gr | 700,000 gr |
Common Pound to Grain conversions
These are the pound-to-grain values people look up most often. Every figure is computed from the exact factor, so you can rely on them for quick reference:
- 1 pound = 7,000 grain
- 2 pound = 14,000 grain
- 2.5 pound = 17,500 grain
- 3 pound = 21,000 grain
- 4 pound = 28,000 grain
- 5 pound = 35,000 grain
- 6 pound = 42,000 grain
- 7 pound = 49,000 grain
- 8 pound = 56,000 grain
- 9 pound = 63,000 grain
- 10 pound = 70,000 grain
- 12 pound = 84,000 grain
- 15 pound = 105,000 grain
- 20 pound = 140,000 grain
- 25 pound = 175,000 grain
- 30 pound = 210,000 grain
- 50 pound = 350,000 grain
- 75 pound = 525,000 grain
- 100 pound = 700,000 grain
- 200 pound = 1,400,000 grain
- 500 pound = 3,500,000 grain
- 1000 pound = 7,000,000 grain
Pound to Grain conversion chart (both directions)
The chart below converts pound to grain and grain to pound side by side, so it works whichever way you need. 1 pound = 7,000 grain, and 1 grain = 0.0001428571 pound.
| Pound → Grain | Grain → Pound |
|---|---|
| 0.25 lb = 1,750 gr | 0.25 gr = 0.00003571429 lb |
| 0.5 lb = 3,500 gr | 0.5 gr = 0.00007142857 lb |
| 1 lb = 7,000 gr | 1 gr = 0.0001428571 lb |
| 2 lb = 14,000 gr | 2 gr = 0.0002857143 lb |
| 3 lb = 21,000 gr | 3 gr = 0.0004285714 lb |
| 4 lb = 28,000 gr | 4 gr = 0.0005714286 lb |
| 5 lb = 35,000 gr | 5 gr = 0.0007142857 lb |
| 6 lb = 42,000 gr | 6 gr = 0.0008571429 lb |
| 7 lb = 49,000 gr | 7 gr = 0.001 lb |
| 8 lb = 56,000 gr | 8 gr = 0.001142857 lb |
| 9 lb = 63,000 gr | 9 gr = 0.001285714 lb |
| 10 lb = 70,000 gr | 10 gr = 0.001428571 lb |
| 12 lb = 84,000 gr | 12 gr = 0.001714286 lb |
| 15 lb = 105,000 gr | 15 gr = 0.002142857 lb |
| 20 lb = 140,000 gr | 20 gr = 0.002857143 lb |
| 25 lb = 175,000 gr | 25 gr = 0.003571429 lb |
| 30 lb = 210,000 gr | 30 gr = 0.004285714 lb |
| 40 lb = 280,000 gr | 40 gr = 0.005714286 lb |
| 50 lb = 350,000 gr | 50 gr = 0.007142857 lb |
| 75 lb = 525,000 gr | 75 gr = 0.01071429 lb |
| 100 lb = 700,000 gr | 100 gr = 0.01428571 lb |
| 150 lb = 1,050,000 gr | 150 gr = 0.02142857 lb |
| 200 lb = 1,400,000 gr | 200 gr = 0.02857143 lb |
| 250 lb = 1,750,000 gr | 250 gr = 0.03571429 lb |
| 500 lb = 3,500,000 gr | 500 gr = 0.07142857 lb |
| 1000 lb = 7,000,000 gr | 1000 gr = 0.1428571 lb |
Pound vs Grain: which is bigger?
A pound is the larger unit: one pound equals 7,000 grains. Put another way, you need 7,000 grains to make a single pound.
What is a Pound? History, origin and usage
The pound descends from the Roman libra pondo — "a pound by weight". English kept "pound" from pondo and the abbreviation "lb" from libra, which is why the word and its symbol look unrelated. For centuries the pound differed between countries and even between trades. That ended on 1 July 1959, when the United States, United Kingdom, Canada, Australia, New Zealand and South Africa agreed a single international pound of exactly 0.453 592 37 kilograms.
The pound is the everyday weight unit in the United States and is still widely used in the United Kingdom for body weight, food and parcels. Body weight, groceries, baggage limits and shipping rates in the US are all quoted in pounds.
Because the 1959 agreement fixed the pound as an exact number of kilograms, every pound conversion on this site is exact rather than approximate. The same agreement fixed the yard at exactly 0.9144 metres — which is why it is known as the yard-and-pound agreement.
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.
Convert 1 Pound to other units
It can help to see a pound next to the other units it is commonly compared with. One pound (lb) is equal to:
| 1 Pound equals | Unit |
|---|---|
| 0.4535924 kg | Kilogram |
| 453.5924 g | Gram |
| 453,592.4 mg | Milligram |
| 453,592,400 µg | Microgram |
| 0.0004535924 t | Tonne |
| 0.004535924 q | Quintal |
| 16 oz | Ounce |
| 0.07142857 st | Stone |
| 0.0005 ton (US) | Short ton |
| 0.0004464286 ton (UK) | Long ton |
| 14.58333 oz t | Troy ounce |
| 7,000 gr | Grain |
| 2,267.962 ct | Carat |
Convert 1 Grain to other units
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 |
Tips for converting Pound to Grain
- To go from pound to grain, multiply by 7,000; to go back, divide by 7,000 (or multiply by 0.0001428571).
- For a quick mental estimate, remember that 1 pound ≈ 7,000 grain, so 10 pound ≈ 70,000 grain.
- 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 Pound to Grain converter
Type a number into the Pound field and the equivalent in Grain 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 Grain field to convert the other way (grain to pound). 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 lb = 7,000 gr), 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 pound-to-grain 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 grain are in 1 pound?
- 1 pound = 7,000 grain (gr). To convert any number of pound to grain, multiply by 7,000.
- How do I convert pound to grain?
- Multiply the number of pound by 7,000. For example, 10 pound = 10 × 7,000 = 70,000 grain, and 25 pound = 175,000 grain.
- How many pound are in 1 grain?
- 1 grain = 0.0001428571 pound. So to convert grain back to pound, multiply by 0.0001428571.
- What is the formula to convert pound to grain?
- grain = pound × 7,000. The reverse formula is pound = grain × 0.0001428571.
- How much is 100 pound in grain?
- 100 pound = 700,000 grain. (And 1000 pound = 7,000,000 grain.)
- Which is bigger, a pound or a grain?
- A pound is larger: 1 pound = 7,000 grain.
- Is this pound to grain converter accurate?
- Yes — every value is computed from the exact 7,000 gr per lb factor (not rounded look-up tables), and the factors are re-verified automatically on every update.
- Can I convert grain to pound too?
- Yes. The converter works both ways — enter a value in either field. 1 grain = 0.0001428571 pound.