Convert pound-force square second/foot to grain [gr] Online | Free weight-and-mass Converter

It looks like you mentioned "pound-force square second per foot". This is a compound unit that can be broken down into:

pound-force (lbf): a unit of force
square second (s²): time squared
per foot (ft⁻¹): per unit length

What does this unit represent?

It could be a unit for something like mass or inertia-related quantities in imperial units, depending on context. For example, it might show up in equations involving force, time, and length — possibly in mechanics or engineering.

To understand or convert it:

Pound-force (lbf) is a force unit, where:

1\, \text{lbf} = 4.44822\, \text{N}

Second squared (s²) is just time squared.
Foot (ft) is length:

1\, \text{ft} = 0.3048\, \text{m}

Example usage

If you want to convert pound-force square second per foot $(\text{lbf} \cdot \text{s}^2/\text{ft})$ into SI units:

\text{lbf} \cdot \text{s}^2/\text{ft} \rightarrow \text{Newton} \cdot \text{s}^2/\text{meter}

Since

1\, \text{lbf} = 4.44822\, \text{N}, \quad 1\, \text{ft} = 0.3048\, \text{m}

1\, \frac{\text{lbf} \cdot \text{s}^2}{\text{ft}} = \frac{4.44822\, \text{N} \cdot \text{s}^2}{0.3048\, \text{m}} \approx 14.6\, \frac{\text{N} \cdot \text{s}^2}{\text{m}}

Could you tell me more about where or how you want to use this unit? That would help me give a more specific explanation or conversion!

Grain [gr]

The grain (gr) is one of the oldest units of mass, traditionally used in various weight systems including troy, apothecary, and avoirdupois.

One grain is defined as exactly 64.79891 milligrams (0.0648 grams). It was originally based on the weight of a single grain of barley or wheat.

Grains are still commonly used today to measure small quantities such as the weight of bullets, arrows, and some pharmaceuticals.

Summary:

1 grain = 64.79891 milligrams (0.0648 grams)
Used in troy, apothecary, and avoirdupois systems
Common in ammunition and medicine measurements

From:		pound-force square second/foot
To:		grain [gr]