Convert Femtonewtons to Kilonewtons
Convert Femtonewtons (fN) to Kilonewtons (kN) instantly and accurately.
Conversion Formula
kN = fN × 1.000000000e-18
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 Kilonewtons
A kilonewton (kN) is 1,000 N - the standard force unit for structural engineering outside North America. A 70 kg person exerts ~0.687 kN; a heavy goods vehicle axle 100-130 kN; a loaded Boeing 747 on its landing gear ~2,800 kN. Eurocode and BS EN structural codes express beam loads and foundation reactions in kN and bending moments in kN·m. Universal testing machines for materials testing are rated 10-10,000 kN. Prestressed concrete tendons are stressed to 100-250 kN each. 1 kN = 1,000 N = 224.81 lbf = 101.97 kgf.
Quick Reference Table
| Femtonewtons (fN) | Kilonewtons (kN) |
|---|---|
| 1 fN | 1 × 10-18 kN |
| 2 fN | 2 × 10-18 kN |
| 5 fN | 5 × 10-18 kN |
| 10 fN | 1 × 10-17 kN |
| 25 fN | 2.5 × 10-17 kN |
| 50 fN | 5 × 10-17 kN |
| 100 fN | 1 × 10-16 kN |