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 dina | 0.00001 | 1g·cm·s⁻² |
| 1 pdl | 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 MN | 1000000 | Exact SI prefix |
Rastreabilidade
O 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.
