Convert weight and mass units — kilograms, pounds, grams, ounces, tons, carats and more.
| Unit | Name | Value |
|---|---|---|
| 0.001 lb | 6.99988 gr | |
| 0.01 lb | 69.9988 gr | |
| 0.1 lb | 699.988 gr | |
| 1 lb | 6999.88 gr | |
| 5 lb | 34999.4 gr | |
| 10 lb | 69998.8 gr | |
| 50 lb | 349994 gr | |
| 100 lb | 699988 gr | |
| 1000 lb | 6.99988e+06 gr |
The Milligram (mg) and the Gram (g) are both units of weight & mass. Converting between them is straightforward using the formula above.
Formula: 1 lb = 6999.877 gr
This converter uses internationally recognized conversion factors. All calculations are performed client-side in your browser — no data is sent to any server.
| Pound (lb) | Grain (gr) | Real-world context |
|---|---|---|
| 0.001 lb | 6.9998765 gr | |
| 0.01 lb | 69.9987654 gr | |
| 0.1 lb | 699.9877 gr | |
| 1 lb | 6999.8765 gr | loaf of bread |
| 10 lb | 69998.7654 gr | small dog |
1 pound (lb) equals exactly 6999.8765 grains (gr). Use the formula: lb × 6999.8765 = gr.
To convert pounds to grains, multiply your value in pounds by 6999.8765. For example, 5 lb × 6999.8765 = 34999.3827 gr.
100 pounds = 699987.6543 grains. Calculation: 100 × 6999.8765 = 699987.6543.
To convert grains back to pounds, divide by 6999.8765 (or multiply by 0.00014286). Example: 10 gr ÷ 6999.8765 = 0.0014286 lb.
Yes. This converter uses the internationally recognised exact conversion factor: 1 lb = 6999.8765 gr. All calculations are performed in your browser with no rounding until display.
10 pounds = 69998.7654 grains. Simply multiply by 6999.8765.
Converting pounds to grains is commonly needed for jewellery valuation, gemstone trading, precious metal buying and selling, and hallmarking compliance where one system uses lb and another uses gr.
The pound (lb) is the primary unit of mass in the US customary and British imperial systems, equal to exactly 453.59237 grams since the International Yard and Pound Agreement of 1959. It is subdivided into 16 ounces. The abbreviation "lb" comes from the Latin libra (scales/balance), while "pound" derives from Latin pondus (weight).
The grain (gr) is the smallest unit in the avoirdupois, troy, and apothecary weight systems, equal to exactly 64.79891 milligrams (0.06479891 g). All three systems share the same grain as base: one avoirdupois pound = 7,000 grains; one troy pound = 5,760 grains. The grain is still used in ballistics (bullet and powder weights) and some pharmaceutical contexts.
The pound traces its origins to ancient Rome's libra pondo (pound weight, ~329 g). Various standards existed in medieval Europe — Troy, Tower, and merchant pounds — until the avoirdupois pound emerged in 13th–14th century England for general trade. The British Weights and Measures Act 1878 formalised it. The modern definition (453.59237 g) was fixed by the US, UK, Australia, Canada, New Zealand, and South Africa in 1959.
Interesting fact: The word "pound sterling" originally meant one pound (12 troy ounces) of sterling silver. Today's British pound currency takes its name from the unit of mass, not the other way around.
The grain is among the oldest measurement units in history, derived from the average weight of a grain of barleycorn (or wheat) — a practical standard used in ancient Egypt, Greece, and Rome. England formalised the barleycorn grain in the 15th century as the foundation of its weight system. The British Weights and Measures Act 1824 defined the grain, and the value remains unchanged today.
Interesting fact: The original grain was calibrated by laying dried barleycorns end-to-end — 32 grains equalled one inch in 13th-century England. Today, 9mm pistol bullets typically weigh 115–147 grains (7.5–9.5 g), and gunpowder charges are specified in grains for reloading.