Ft/s to MPH Converter: Quick & Easy Speed Conversion Tool
Convert feet per second to miles per hour by multiplying by 0.681818; 100 ft/s becomes 68.18 mph (Units of Length – NIST, https://www.nist.gov). The online tool automates this math, lets you pick 0–10 decimal places, and returns instant, precision-controlled results.
ft/s to mph Converter
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How to use the tool
Enter speed (ft/s). Type your value—e.g., 47.3 or 162.8.
Choose decimal places. Any whole number from 0 to 10—e.g., 1 or 5.
Press Convert. The result appears beneath the form.
U.S. road signs: Posted in mph since 1978 (FHWA Manual, https://mutcd.fhwa.dot.gov).
Understanding the units
Feet per second (ft/s)
Ft/s expresses distance traveled in one second; engineers measure conveyor or projectile speeds in this unit (Engineering Toolbox, https://www.engineeringtoolbox.com).
Miles per hour (mph)
Mph denotes miles traveled in an hour and appears on vehicle dashboards and weather reports (USDOT, 2020 Highway Statistics).
Where is this conversion useful?
Sports analytics: Calculate runner or pitch velocity for broadcasts.
Drone piloting: Convert telemetry to mph for quick situational awareness.
Physics labs: Communicate experiment results in everyday units.
Logistics: Verify conveyor belt or vehicle speeds against safety limits.
FAQ
Why convert ft/s to mph?
Most U.S. audiences understand mph; the conversion makes technical data relatable (USDOT, 2020).
What’s the exact factor?
Multiply by 0.6818181818, derived from 5280 ft per mile and 3600 s per hour (NIST, https://www.nist.gov).
Is the tool accurate?
Yes; it calculates with the full factor then rounds to your chosen decimal place.
What range can I input?
The script handles any real number up to JavaScript’s 15-digit precision—far beyond typical speeds.
How do I estimate mentally?
Use two-thirds of the ft/s value for a quick ≈3% low estimate (Physics Classroom, https://www.physicsclassroom.com).
Does temperature affect the math?
No; the units are purely kinematic and independent of atmospheric conditions.
Can I reverse the conversion?
Yes; divide mph by 0.681818 to get ft/s, or use an mph→ft/s tool.
Is mph an SI unit?
No; SI uses metres per second, but mph remains legal for U.S. commerce (NIST Handbook 44, 2022).
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