Conversion method
Standard gravity gₙ is exactly 9.80665 m/s². Local gravitational acceleration varies. Signed acceleration is supported.
gₙ = x × 0.10197162129779283
10 m/s² = 1.019716 gₙ.
| m/s² | gₙ |
|---|---|
| 1 | 0.101972 |
| 5 | 0.509858 |
| 10 | 1.019716 |
| 25 | 2.549291 |
| 50 | 5.098581 |
| 100 | 10.197162 |
Unit definitions and sources
Standard gravity gₙ is exactly 9.80665 m/s². Local gravitational acceleration varies. Signed acceleration is supported.
| Unit and system | Use | Definition | Relationship |
|---|---|---|---|
| Meter per second squared (m/s²); si | Common units | Meter per second squared: base (m-s2) = value × 1. Common use: Acceleration. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Standard gravity (gₙ); si | Common units | Standard gravity: base (m-s2) = value × 9.80665. Common use: Acceleration. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Foot per second squared (ft/s²); si | Specialist units | Foot per second squared: base (m-s2) = value × 0.3048. Common use: Acceleration. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Gal (centimeter per second squared) (Gal); si | Specialist units | Gal (centimeter per second squared): base (m-s2) = value × 0.01. Common use: Acceleration. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Millimeter per second squared (mm/s²); si | Specialist units | Millimeter per second squared: base (m-s2) = value × 0.001. Common use: Acceleration. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Inch per second squared (in/s²); si | Specialist units | Inch per second squared: base (m-s2) = value × 0.0254. Common use: Acceleration. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Decimeter/square second (dm/(s²)); other | Specialist units | decimeter/square second = 0.1 m-s2, derived from the component SI/customary definitions. Common use: Acceleration. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Kilometer/square second (km/(s²)); other | Specialist units | kilometer/square second = 1000.0 m-s2, derived from the component SI/customary definitions. Common use: Acceleration. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Hectometer/square second (hm/(s²)); other | Specialist units | hectometer/square second = 100.0 m-s2, derived from the component SI/customary definitions. Common use: Acceleration. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Centimeter/square second (cm/(s²)); other | Specialist units | centimeter/square second = 0.01 m-s2, derived from the component SI/customary definitions. Common use: Acceleration. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Micrometer/square second (µm/(s²)); other | Specialist units | micrometer/square second = 1e-06 m-s2, derived from the component SI/customary definitions. Common use: Acceleration. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Nanometer/square second (nm/(s²)); other | Specialist units | nanometer/square second = 1e-09 m-s2, derived from the component SI/customary definitions. Common use: Acceleration. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Picometer/square second (pm/(s²)); other | Specialist units | picometer/square second = 1e-12 m-s2, derived from the component SI/customary definitions. Common use: Acceleration. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Femtometer/square second (fm/(s²)); other | Specialist units | femtometer/square second = 1e-15 m-s2, derived from the component SI/customary definitions. Common use: Acceleration. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Attometer/square second (am/(s²)); other | Specialist units | attometer/square second = 1e-18 m-s2, derived from the component SI/customary definitions. Common use: Acceleration. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Mile/square second (mi/(s²)); other | Specialist units | mile/square second = 1609.344 m-s2, derived from the component SI/customary definitions. Common use: Acceleration. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Yard/square second (yd/(s²)); other | Specialist units | yard/square second = 0.9144 m-s2, derived from the component SI/customary definitions. Common use: Acceleration. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
Sources: NIST: SP 811 Appendix B.8: conversion factors; BIPM: SI prefixes
Precision of acceleration conversions
All 17 acceleration units convert through Meter per second squared (m/s²). 17 have an exact defined relationship to the base unit and 0 are conventional or measured values. Results and the tables on this page come from the same engine, so a table value can be checked against the converter directly.
Standard display shows up to six decimal places, switching to scientific notation for very large or small values. Calculation uses JavaScript binary floating point independently of display rounding, so extra digits are not a claim about measurement accuracy. Each unit lists its own source; a citation records where the definition comes from, not an independent review. See Conversion methodology for the review and correction process.