Pound to Grain Converter
Quick answer
To convert Pounds to Grains, multiply by 7,000 (or divide by 0.0001428571). Therefore, 1 Pound (lb) equals 7,000 Grains (gr).
Formula: gr = lb × 7,000. Worked example: 10 lb = 70,000 gr.
Convert Pound (lb) to Grain (gr) online with our free unit converter. In mass, 1 lb = 7,000 gr. Explore step-by-step conversion steps, mathematical formulas, and quick conversion reference tables below.
Worked example: converting Pound to Grain
- Step 1 — start with the formula. gr = lb × 7,000
- Step 2 — substitute your figure. 10 lb × 7,000
- Step 3 — read the result. 10 lb = 70,000 gr
- Step 4 — check it in reverse. lb = gr × 0.0001428571 returns Invalid lb, which matches the figure you started with.
Mass Converter
26 units available
1 lb = 7,000 gr
Formula:
gr = lb × 7,000With your value: 1 lb = 7,000 gr
How big is that?
Everyday references on a logarithmic scale, all expressed in pound so you can sanity-check the result.
Other Pound to Grain conversions
Pound to Grain Conversion Table
| Pound (lb) | Grain (gr) |
|---|---|
| 0.5 | 3,500 |
| 1 | 7,000 |
| 2 | 14,000 |
| 5 | 35,000 |
| 10 | 70,000 |
| 15 | 105,000 |
| 20 | 140,000 |
| 25 | 175,000 |
| 50 | 350,000 |
| 100 | 700,000 |
| 250 | 1,750,000 |
| 500 | 3,500,000 |
| 1000 | 7,000,000 |
Grain to Pound Conversion Table
| Grain (gr) | Pound (lb) |
|---|---|
| 0.5 | 7.142857e-5 |
| 1 | 0.000143 |
| 2 | 0.000286 |
| 5 | 0.000714 |
| 10 | 0.001429 |
| 15 | 0.002143 |
| 20 | 0.002857 |
| 25 | 0.003571 |
| 50 | 0.007143 |
| 100 | 0.014286 |
| 250 | 0.035714 |
| 500 | 0.071429 |
| 1000 | 0.142857 |
Where these values come from
Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.
Pound (lb)
Mass
1 avoirdupois pound = 0.453 592 37 kg exactly (1959 international agreement).
Source: International Yard and Pound Agreement of 1959; NIST Federal Register Notice 59-5442
US, UK, Canada, Australia, New Zealand, South Africa · Reviewed 2026-07-01
Grain (gr)
Mass
Traceable to the kilogram, defined by fixing the Planck constant at 6.626 070 15 × 10⁻³⁴ J·s. Avoirdupois masses derive from the 1959 international pound (0.453 592 37 kg exactly).
Source: BIPM, The International System of Units (SI), 9th edition, 2019 (updated 2024)
Bureau International des Poids et Mesures · Reviewed 2026-07-01
How to Convert Pound to Grain
To convert from Pound (lb) to Grain (gr), multiply the value by 7,000.
Formula: gr = lb × 7,000
Reverse: lb = gr × 0.0001428571
Step-by-Step Example
- Start with your value in Pound. For example: 5 lb
- Multiply by the conversion factor: 5 x 7,000
- The result is: 35,000 gr
Pound and Grain Relationship
This calculation facilitates standardized conversion between recognized units of mass. Since 1 Pound equals approximately 7,000 Grains, the Pound represents a larger unit interval than the Grain. Understanding the relationship between Pound and Grain is essential for accurate calculations in physics, engineering, commerce, and daily applications.
About Pound
The pound (lb) is an imperial unit of mass equal to exactly 0.45359237 kilograms. It is the primary unit of weight in the United States.
Fun Fact: The abbreviation "lb" comes from the Latin "libra pondo" meaning "a pound by weight."
Common uses of Pound: body weight (US), food packaging, shipping.
About Grain
The grain equals exactly 64.79891 milligrams and was originally the weight of a single barleycorn. It is still the standard unit for bullets, propellant and arrows.
Common uses of Grain: ammunition, archery, pharmacy (historic).
Frequently Asked Questions
- How many Grains are in 1 Pound?
- There are exactly 7,000 Grains in 1 Pound. This means the conversion factor from Pound to Grain is 7,000.
- What is the formula to convert Pound to Grain?
- The formula to convert Pound to Grain is: gr = lb × 7,000. For example, to convert 10 Pounds to Grains, you would multiply 10 by 7,000.
- What is a Pound?
- The pound (lb) is an imperial unit of mass equal to exactly 0.45359237 kilograms. It is the primary unit of weight in the United States.
- What is a Grain?
- The grain equals exactly 64.79891 milligrams and was originally the weight of a single barleycorn. It is still the standard unit for bullets, propellant and arrows.
- What are the common uses of Pound?
- The Pound is commonly used in body weight (US), food packaging, shipping.
Related Mass Conversions
Cite this page
UnitConvertLab. (2026). Pound to Grain converter. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/pound-to-grain