ucUnitCloudInternational unit matrix

Use case

Physics, school and engineering

Keep acceleration, force and velocity apart and do not confuse lower-case g with the gram.

Working steps

  1. Check which quantity is actually asked for: acceleration, force or velocity.
  2. Convert velocity to m/s before computing with it — divide km/h by 3.6.
  3. Bring acceleration into m/s²; multiply g values by 9.80665.
  4. For a force additionally provide the mass in kilograms, because force is mass times acceleration.
  5. When working with trigonometric functions check the calculator mode: degrees or radians.

Checks

Unit family: Acceleration

Matching conversions

Standard gravity to Metre per second squaredg → m/s²AccelerationMetre per second squared to Standard gravitym/s² → gAccelerationGal to Metre per second squaredGal → m/s²AccelerationFoot per second squared to Metre per second squaredft/s² → m/s²AccelerationKilometres per hour to Metres per secondkm/h → m/sSpeedMetres per second to Kilometres per hourm/s → km/hSpeed

Further reading

GuideAcceleration and g-force

Sources

BIPM SI BrochureSI base units, prefixes and official SI context.NIST Guide to SI Appendix BNIST conversion-factor method and non-SI factors.
When not to use

Do not use as the sole basis for official, medical, safety-critical or contractual decisions.

Citation

Citation note: UnitCloud, use case, sources reviewed: September 2026. Source basis: BIPM SI Brochure · NIST Guide to SI Appendix B.