Convert Ounce-Force to Femtonewtons
Convert Ounce-Force (ozf) to Femtonewtons (fN) instantly and accurately.
Conversion Formula
fN = ozf × 278013851000000
About Ounce-Force
One ounce-force (ozf) is 1/16 of a pound-force - approximately 0.2780 N. It is used for small-scale US customary force measurements: postal scales, miniature connector insertion forces, and small latch springs. Hobby servo motor torque is rated in oz·in (ounce-inches); dividing by arm length gives force in ozf. Snap, zipper, and hook-and-loop closure test gauges specify pull-off forces in ozf. Cosmetic packaging component actuation forces (lipstick, compact closures) also use ozf. 1 ozf = 1/16 lbf = 28.3495 gf = 0.27801 N.
About Femtonewtons
A femtonewton (fN) is 10⁻¹⁵ N - the force scale of single-molecule biology. RNA polymerase exerts a stall force of ~14-25 fN while transiting DNA at 10-50 bp/s. Myosin V motor proteins step 37 nm with ~1-3 fN per head. The viscous drag on a 100 nm nanoparticle moving at 1 µm/s through cytoplasm is ~0.2-0.5 fN. Optical tweezers with back-focal-plane detection resolve sub-femtonewton forces, enabling measurement of single-enzyme output. AFM receptor-ligand unbinding (e.g., biotin-streptavidin) gives adhesion forces of 100-300 fN. 1 fN = 10⁻¹⁵ N.
Quick Reference Table
| Ounce-Force (ozf) | Femtonewtons (fN) |
|---|---|
| 1 ozf | 2.78 × 1014 fN |
| 2 ozf | 5.56 × 1014 fN |
| 5 ozf | 1.39 × 1015 fN |
| 10 ozf | 2.78 × 1015 fN |
| 25 ozf | 6.95 × 1015 fN |
| 50 ozf | 1.39 × 1016 fN |
| 100 ozf | 2.78 × 1016 fN |