Exact definitions — signed force quantity
Exact Force Unit Converter
Convert the same force quantity between SI,gravitational and customary force units. The converter does not infer mass,local weight,bolt preload or a safe working load.
Converted force
Single-newton base
valueoutput=FN/factoroutput
The newton is the coherent SI force unit:1N=1kg·m·s⁻². SI prefixes are exact,so1daN=10N,1kN=1000N and1MN=1,000,000N.
| Input unit | Exact factor to N | Definition basis |
|---|---|---|
| 1 dyn | 0.00001 | 1g·cm·s⁻² |
| 1 gói | 0.138254954376 | 1lb·ft·s⁻² |
| 1 N | 1 | SI coherent derived unit |
| 1 daN | 10 | Exact SI prefix |
| 1 kgf | 9.80665 | 1kg×standard acceleration |
| 1 lbf | 4.4482216152605 | 1lb×standard acceleration |
| 1 kN | 1000 | Exact SI prefix |
| 1 kip | 4448.2216152605 | Exactly1000lbf |
| 1 triệu | 1000000 | Exact SI prefix |
Khả năng truy xuất nguồn gốc
The BIPM SI Brochure,9th edition (2019,updated2026) gives the SI system and coherent derived units. NIST SP811 AppendixB.8 publishes the conventional kgf,lbf,kip and poundal conversions. The implementation derives full-precision factors from exact1lb=0.45359237kg,1ft=0.3048m and standard acceleration gN=9.80665m/s².
Mass,weight and engineering limits
Mass is not force. Actual weight is the local gravitational force and uses the local acceleration of free fall,not automatically gN. Kilogram-force and pound-force are conventional force units based on gN. A force-unit conversion supplies no fastener proof area,preload fraction,friction model,load path or safety factor;therefore no bolt or lifting recommendation is produced.
