Convert Femtonewtons to Pond
Convert Femtonewtons (fN) to Pond (p) instantly and accurately.
Conversion Formula
p = fN × 1.019716213e-13
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.
About Pond
The pond (p), also called gram-force (gf), is the gravitational force on 1 g under standard gravity - exactly 9.80665 × 10⁻³ N. It belongs to the metric gravitational technical system that dominated continental European engineering before SI. One thousand ponds = one kilopond (kp) = kilogram-force (kgf). Laboratory balances reading in grams technically measure pond, not mass. Older Mettler and Sartorius balance specs quote spring forces in pond. Pre-SI textile tensile strength was expressed in pond/tex. 1 p = 1 gf = 9.80665 mN = 0.001 kgf.
Quick Reference Table
| Femtonewtons (fN) | Pond (p) |
|---|---|
| 1 fN | 1.02 × 10-13 p |
| 2 fN | 2.039 × 10-13 p |
| 5 fN | 5.099 × 10-13 p |
| 10 fN | 1.02 × 10-12 p |
| 25 fN | 2.549 × 10-12 p |
| 50 fN | 5.099 × 10-12 p |
| 100 fN | 1.02 × 10-11 p |