Convert acceleration units — m/s², ft/s², g-force, Gal and more.
| Unit | Name | Value |
|---|---|---|
| m/s² | Meter/Square Second | 0.0254 |
| cm/s² | Centimeter/Square Second | 2.54 |
| ft/s² | Foot/Square Second | 0.083333333 |
| g | Standard Gravity | 0.0025900792 |
| Gal | Gal (cm/s²) | 2.54 |
| mG | Millig | 2.5900792 |
Formula: Standard Gravity = in/s² × 0.00259
Multiply any in/s² value by 0.00259 to get Standard Gravity.
Reverse: in/s² = Standard Gravity × 386.1
Common acceleration values — factor: 1 in/s² = 0.00259 g
| in/s² (in/s²) | Standard Gravity (g) | Context |
|---|---|---|
| 0.001 in/s² | 2.590e-06 g | Micro |
| 0.1 in/s² | 0.000259 g | Very small |
| 1 in/s² | 0.00259 g | 1 in/s² |
| 10 in/s² | 0.0259 g | 10 in/s² |
| 100 in/s² | 0.259 g | 2.6 g range |
| 386 in/s² | 0.9998 g | 1 g = 386.1 in/s² |
| 500 in/s² | 1.295 g | ~1.3 g |
| 1000 in/s² | 2.59 g | ~2.6 g |
| 3860 in/s² | 9.998 g | ~10 g |
| 5000 in/s² | 12.95 g | ~13 g |
| 1e+04 in/s² | 25.9 g | ~26 g |
| 5e+04 in/s² | 129.5 g | ~130 g |
| 1e+05 in/s² | 259 g | ~259 g |
| 5e+05 in/s² | 1295 g | ~1,295 g |
| 1e+06 in/s² | 2590 g | ~2,590 g |
1 in/s² = 0.00259 g.
9.807 m/s² = 1 g = 32.17 ft/s² = 980.7 cm/s² — use as reference.
Multiply result by 386.1 to recover the original in/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.
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.
Standard gravity (g) is defined as exactly 9.80665 m/s², representing the nominal gravitational acceleration at Earth's surface (sea level, 45° latitude). It was adopted as a standard by the International Committee on Weights and Measures (CIPM) in 1901.
G-force (multiples of g) is the most intuitive acceleration unit for human experience: commercial aircraft cruise at about 1g; fighter jet maneuvers at 4–9g; astronaut launch at 3g; roller coasters at 2–6g. Human loss of consciousness (G-LOC) occurs at about 5–9g sustained.
Interesting fact: At 0g (weightlessness), the human vestibular system becomes confused within seconds — causing space sickness in about half of all astronauts. At the Moon's surface, gravity is 0.165g; on Mars 0.38g; on Jupiter's surface, about 2.5g.
Converting in/s² to Standard Gravity 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 in/s² = 0.0259 g. Reverse: 1 g = 386.1 in/s². Factor: 1 in/s² = 0.00259 g.
All conversions use IEEE 754 double-precision arithmetic, accurate to at least 8 significant figures.