Convert Milligram-Force to Femtonewtons
Convert Milligram-Force (mgf) to Femtonewtons (fN) instantly and accurately.
Conversion Formula
fN = mgf × 9806650000
About Milligram-Force
One milligram-force (mgf) is the gravitational force on 1 mg under standard gravity - exactly 9.80665 × 10⁻⁶ N. It is the natural unit for ultra-precise analytical balances: a 0.001 mg readability balance resolves ~9.8 nN = 0.001 mgf. MEMS force sensors in precision weighing cells are specified in mgf. Watchmaking uses mgf gauges to measure hairspring and detent actuation forces. Entomology and microbiology measure insect and microorganism attachment forces in mgf. Aerospace composite strain sensors are calibrated with mgf reference weights. 1 mgf = 9.80665 µN = 0.980665 dyn.
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
| Milligram-Force (mgf) | Femtonewtons (fN) |
|---|---|
| 1 mgf | 9.807 × 109 fN |
| 2 mgf | 1.961 × 1010 fN |
| 5 mgf | 4.903 × 1010 fN |
| 10 mgf | 9.807 × 1010 fN |
| 25 mgf | 2.452 × 1011 fN |
| 50 mgf | 4.903 × 1011 fN |
| 100 mgf | 9.807 × 1011 fN |