Convert Pound-force to Newton
Unit definitions
Pound-force
Pound-force is the force exerted by a mass of one pound in standard gravity ($gₙ$) ($1\ \text{lbf} \approx 4.448\,22\ \text{N}$).
Newton
The newton is the SI unit of force. It is the force required to accelerate a mass of one kilogram at a rate of one meter per second squared.
How to convert Pound-force to Newton
$$\text{Force}_{\text{N}} = \text{Force}_{\text{lbf}} \cdot 4.4482216152605$$
Examples
Example 1
Convert $25.0\ \text{lbf}$ to $\text{N}$.
$$\text{Force}_{\text{N}} = 25.0 \cdot 4.4482216152605$$
$$\text{Force}_{\text{N}} = 111.20554$$
$$\therefore \ 25.0\ \text{lbf} = 111.20554 \ \text{N}$$
Example 2
Convert $85.0\ \text{lbf}$ to $\text{N}$.
$$\text{Force}_{\text{N}} = 85.0 \cdot 4.4482216152605$$
$$\text{Force}_{\text{N}} = 378.098837$$
$$\therefore \ 85.0\ \text{lbf} = 378.098837 \ \text{N}$$
Example 3
Convert $120.0\ \text{lbf}$ to $\text{N}$.
$$\text{Force}_{\text{N}} = 120.0 \cdot 4.4482216152605$$
$$\text{Force}_{\text{N}} = 533.786594$$
$$\therefore \ 120.0\ \text{lbf} = 533.786594 \ \text{N}$$
Example 4
Convert $140.0\ \text{lbf}$ to $\text{N}$.
$$\text{Force}_{\text{N}} = 140.0 \cdot 4.4482216152605$$
$$\text{Force}_{\text{N}} = 622.751026$$
$$\therefore \ 140.0\ \text{lbf} = 622.751026 \ \text{N}$$
Example 5
Convert $160.0\ \text{lbf}$ to $\text{N}$.
$$\text{Force}_{\text{N}} = 160.0 \cdot 4.4482216152605$$
$$\text{Force}_{\text{N}} = 711.715458$$
$$\therefore \ 160.0\ \text{lbf} = 711.715458 \ \text{N}$$