Convert acceleration units — m/s², ft/s², g-force, Gal and more.
| Unit | Name | Value |
|---|---|---|
| cm/s² | Centimeter/Square Second | 100 |
| ft/s² | Foot/Square Second | 3.2808399 |
| in/s² | Inch/Square Second | 39.370079 |
| g | Standard Gravity | 0.10197162 |
| Gal | Gal (cm/s²) | 100 |
| mG | Millig | 101.97162 |
Formula: in/s² = m/s² × 39.37
Multiply any m/s² value by 39.37 to get in/s².
Reverse: m/s² = in/s² × 0.0254
Common acceleration values — factor: 1 m/s² = 39.37 in/s²
| m/s² (m/s²) | in/s² (in/s²) | Context |
|---|---|---|
| 0.001 m/s² | 0.03937 in/s² | Seismic micro |
| 0.01 m/s² | 0.3937 in/s² | Gentle vibration |
| 0.1 m/s² | 3.937 in/s² | Slow elevator |
| 0.98 m/s² | 38.58 in/s² | 0.1 g |
| 1 m/s² | 39.37 in/s² | 1 m/s² |
| 1.62 m/s² | 63.78 in/s² | Moon surface |
| 3.7 m/s² | 145.7 in/s² | Mars surface |
| 4.9 m/s² | 192.9 in/s² | 0.5 g braking |
| 9.807 m/s² | 386.1 in/s² | 1 g Earth surface |
| 19.6 m/s² | 771.7 in/s² | 2 g |
| 50 m/s² | 1969 in/s² | 5 g fighter jet |
| 98.07 m/s² | 3861 in/s² | 10 g |
| 100 m/s² | 3937 in/s² | ~10 g |
| 490 m/s² | 1.929e+04 in/s² | ~50 g |
| 1000 m/s² | 3.937e+04 in/s² | ~100 g crash |
1 m/s² = 39.37 in/s².
9.807 m/s² = 1 g = 32.17 ft/s² = 980.7 cm/s² — use as reference.
Multiply result by 0.0254 to recover the original m/s² value.
Specifies aircraft and spacecraft acceleration loads in g and m/s² for structural design and pilot tolerance.
Measures vehicle acceleration performance (0–100 km/h) and braking deceleration in m/s² and g.
Uses Gal and mGal to measure variations in Earth's gravitational field for mineral exploration.
Programs joint acceleration limits in m/s² or in/s² for servo motor control and trajectory planning.
Calculates seismic acceleration loads (in g or m/s²) for earthquake-resistant building design.
Measures athlete acceleration performance using accelerometers reporting in g or m/s².
The meter per second squared (m/s²) is the SI unit of acceleration, defined as the rate of change of velocity in meters per second, per second. It was formalized with the adoption of the International System of Units in 1960, building on Newton's second law F = ma.
m/s² is the universal unit in physics and engineering: free-fall acceleration on Earth = 9.80665 m/s²; a sports car accelerating from 0–100 km/h in 4 seconds experiences about 6.9 m/s²; the Large Hadron Collider accelerates particles at up to 10²⁰ m/s².
Interesting fact: The highest g-force ever survived by a human was 46.2g (453 m/s²), experienced by racing driver David Purley in a crash at the 1977 British Grand Prix. The acceleration lasted only milliseconds but was survivable due to the restraint system.
Inches per second squared (in/s²) is used in precision mechanical engineering and robotics where displacements are measured in inches. One in/s² = 0.0254 m/s².
In/s² appears in servo motor specifications, CNC machine acceleration profiles, and vibration analysis in US manufacturing. A servo motor might be rated for 500 in/s² maximum acceleration; a hard drive read head accelerates at thousands of in/s².
Interesting fact: Hard drive read/write heads accelerate at up to 550,000 in/s² (1,400 g) and can position themselves across the platter in milliseconds — making them among the fastest-moving precision components in consumer electronics.
Converting m/s² to in/s² is common in aerospace, automotive, geophysics, and robotics. Physics and SI engineering use m/s²; US aerospace uses ft/s²; geophysics uses Gal (cm/s²); and g-force is universal. Key anchor: Earth surface gravity = 9.807 m/s² = 1 g = 32.17 ft/s² = 980.7 Gal.
Quick reference: 10 m/s² = 393.7 in/s². Reverse: 1 in/s² = 0.0254 m/s². Factor: 1 m/s² = 39.37 in/s².
All conversions use IEEE 754 double-precision arithmetic, accurate to at least 8 significant figures.