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Acceleration

ft/s²tomph/s

Convert feet per second squared (ft/s²) to miles per hour per second (mph/s).

Factor1 ft/s² = 0.6818182 mph/s

Converter

ft/s²

Accepts numbers or expressions, e.g. 150 + 14.7

Result
6.81818mph/s

Rendered to 6 significant figures.

Formula

Formula
mph/s = ft/s² × 0.6818182

Multiply any value in feet per second squared by 0.6818182 to obtain the value in miles per hour per second.

Worked example

Convert 10 ft/s² to mph/s.

  1. 01Start with 10 ft/s².
  2. 02Multiply by the conversion factor: 10 × 0.6818182 = 6.81818 mph/s.
Result10 ft/s² = 6.81818 mph/s

Conversion table

ft/s²mph/s
10.68182
21.3636
53.4091
106.8182
2013.636
5034.091
10068.182
200136.36
500340.91
1000681.82

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from ft/s² to mph/s?
1 ft/s² equals 0.6818182 mph/s. To convert, multiply the value in feet per second squared by 0.6818182.
How do I convert 1 ft/s² to mph/s?
1 ft/s² = 0.681818 mph/s. For any value, multiply by 0.6818182.
How do I convert mph/s back to ft/s²?
Divide by the same factor — or equivalently, multiply by 1.466667. So 1 mph/s = 1.46667 ft/s².
When would I need to convert foot per second squared to mile per hour per second?
Acceleration conversions between ft/s² and mph/s are common in vibration analysis, seismic load calculations, mechanical equipment specifications, and motion-control design. m/s² is the SI standard; g (standard gravity) is widely used in shock, vibration, and ride-quality work.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).

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