Force Unit Converter
Select from SI, U.S./English engineering, gravitational, and legacy force units. Scientific notation and comma-separated input are accepted.
Find the force unit before you convert it.
The force-only library keeps the same reference structure as the Metrioc NIST converter while separating NIST-listed force relationships from useful SI-prefixed and derived/common units.
SI Force
U.S. / English
Gravitational Force
Legacy / CGS
TECHNICAL BASIS
Built for force measurement work.
This page keeps the same Metrioc calculator language as the Significant Figures Calculator and the general NIST SP 811 Unit Converter, while focusing the workflow on force units only.
REFERENCE BASIS
01
NIST SP 811 reference
Uses the force relationships in NIST Special Publication 811 (2008), Appendix B.9, with the NIST PDF linked directly from the tool.
EXACT FACTORS
02
Exact relationships where available
The internal library preserves exact definitions where available, including pound-force and kilogram-force relationships, rather than relying only on rounded display factors.
UNIT COVERAGE
03
26 force-unit choices
Includes SI-prefixed newtons, U.S./English force units, gravitational force units, and legacy/CGS force units in one searchable converter.
FORCE UNIT COVERAGE
One converter. Four force-unit families.
The converter labels NIST-listed relationships separately from units that are exact SI-prefix applications or common derived engineering relationships.
NIST-listed force relationships
dyne (dyn)
kilogram-force (kgf) and kilopond (kp)
kip
ounce-force (ozf)
poundal (pdl)
pound-force (lbf)
U.S. ton-force (2000 lbf)
SI-prefixed & derived/common units
SI newton family: nN, µN, mN, cN, dN, N, daN, hN, kN, MN, GN
Engineering: klbf and long ton-force
Gravitational: mgf, gf, metric ton-force (tf)
CGS multiples: kdyn and Mdyn
REFERENCE NOTE
Use SP 811 as the conversion reference—not as a substitute for current SI guidance.
NIST states that Special Publication 811 has not yet been updated to reflect the SI changes that took effect on May 20, 2019. This converter uses the force relationships in Appendix B.9 and clearly identifies derived/common additions. For broader SI rules, consult current NIST SI guidance.
RELATED TECHNICAL TOOLS
Continue the calculation workflow.
Use the broader NIST converter when you need other physical quantities, or use the Significant Figures Calculator when you need to control rounding and reported digits.
FORCE CALIBRATION SUPPORT
Need more than a unit conversion?
Metrioc supports force calibration, measurement uncertainty, calibration systems, and custom force-measurement solutions.