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Speed • NIST Exact

Feet per Second → Miles per Hour

ft/s → mph

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NIST Exact

Based on U.S. National Institute of Standards

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Feet per Second to Miles per Hour Formula

To convert from Feet per Second to Miles per Hour, you can use the following formula:

Miles per Hour = Feet per Second × NaN

This means you need to multiply your Feet per Second value by NaN to get the equivalent value in Miles per Hour.

ft/s → mph Reference Table

ft/s mph
0.001 ft/s 0.0006818181818 mph
0.002 ft/s 0.001363636364 mph
0.003 ft/s 0.002045454545 mph
0.004 ft/s 0.002727272727 mph
0.005 ft/s 0.003409090909 mph
0.006 ft/s 0.004090909091 mph
0.007 ft/s 0.004772727273 mph
0.008 ft/s 0.005454545455 mph
0.009 ft/s 0.006136363636 mph
0.01 ft/s 0.006818181818 mph
0.02 ft/s 0.01363636364 mph
0.03 ft/s 0.02045454545 mph
0.04 ft/s 0.02727272727 mph
0.05 ft/s 0.03409090909 mph
0.06 ft/s 0.04090909091 mph
0.07 ft/s 0.04772727273 mph
0.08 ft/s 0.05454545455 mph
0.09 ft/s 0.06136363636 mph
0.1 ft/s 0.06818181818 mph
0.2 ft/s 0.1363636364 mph
0.3 ft/s 0.2045454545 mph
0.4 ft/s 0.2727272727 mph
0.5 ft/s 0.3409090909 mph
0.6 ft/s 0.4090909091 mph
0.7 ft/s 0.4772727273 mph
0.8 ft/s 0.5454545455 mph
0.9 ft/s 0.6136363636 mph
1 ft/s 0.6818181818 mph
1.5 ft/s 1.022727273 mph
2 ft/s 1.363636364 mph
2.5 ft/s 1.704545455 mph
3 ft/s 2.045454545 mph
3.5 ft/s 2.386363636 mph
4 ft/s 2.727272727 mph
4.5 ft/s 3.068181818 mph
5 ft/s 3.409090909 mph
5.5 ft/s 3.75 mph
6 ft/s 4.090909091 mph
6.5 ft/s 4.431818182 mph
7 ft/s 4.772727273 mph
7.5 ft/s 5.113636364 mph
8 ft/s 5.454545455 mph
8.5 ft/s 5.795454545 mph
9 ft/s 6.136363636 mph
9.5 ft/s 6.477272727 mph
10 ft/s 6.818181818 mph
11 ft/s 7.5 mph
12 ft/s 8.181818182 mph
13 ft/s 8.863636364 mph
14 ft/s 9.545454545 mph
15 ft/s 10.22727273 mph
16 ft/s 10.90909091 mph
17 ft/s 11.59090909 mph
18 ft/s 12.27272727 mph
19 ft/s 12.95454545 mph
20 ft/s 13.63636364 mph
25 ft/s 17.04545455 mph
30 ft/s 20.45454545 mph
35 ft/s 23.86363636 mph
40 ft/s 27.27272727 mph
45 ft/s 30.68181818 mph
50 ft/s 34.09090909 mph
55 ft/s 37.5 mph
60 ft/s 40.90909091 mph
65 ft/s 44.31818182 mph
70 ft/s 47.72727273 mph
75 ft/s 51.13636364 mph
80 ft/s 54.54545455 mph
85 ft/s 57.95454545 mph
90 ft/s 61.36363636 mph
95 ft/s 64.77272727 mph
100 ft/s 68.18181818 mph
120 ft/s 81.81818182 mph
125 ft/s 85.22727273 mph
130 ft/s 88.63636364 mph
140 ft/s 95.45454545 mph
150 ft/s 102.2727273 mph
160 ft/s 109.0909091 mph
175 ft/s 119.3181818 mph
180 ft/s 122.7272727 mph
200 ft/s 136.3636364 mph
225 ft/s 153.4090909 mph
250 ft/s 170.4545455 mph
275 ft/s 187.5 mph
300 ft/s 204.5454545 mph
350 ft/s 238.6363636 mph
400 ft/s 272.7272727 mph
450 ft/s 306.8181818 mph
500 ft/s 340.9090909 mph
600 ft/s 409.0909091 mph
700 ft/s 477.2727273 mph
750 ft/s 511.3636364 mph
800 ft/s 545.4545455 mph
900 ft/s 613.6363636 mph
1000 ft/s 681.8181818 mph
1200 ft/s 818.1818182 mph
1250 ft/s 852.2727273 mph
1500 ft/s 1022.727273 mph
1750 ft/s 1193.181818 mph
2000 ft/s 1363.636364 mph
2500 ft/s 1704.545455 mph
3000 ft/s 2045.454545 mph
4000 ft/s 2727.272727 mph
4500 ft/s 3068.181818 mph
5000 ft/s 3409.090909 mph
6000 ft/s 4090.909091 mph
7000 ft/s 4772.727273 mph
7500 ft/s 5113.636364 mph
8000 ft/s 5454.545455 mph
9000 ft/s 6136.363636 mph
10000 ft/s 6818.181818 mph
15000 ft/s 10227.27273 mph
20000 ft/s 13636.36364 mph
25000 ft/s 17045.45455 mph
50000 ft/s 34090.90909 mph
75000 ft/s 51136.36364 mph
100000 ft/s 68181.81818 mph

Values based on NIST SP 811 conversion factors

Why Convert Feet per Second to Miles per Hour?

Converting between feet per second (ft/s) and miles per hour (mph) is one of the most common speed conversions. Whether for engineering, cooking, travel, or science, knowing how to quickly convert ft/s to mph saves time and prevents errors.

Speed conversions from ft/s to mph are critical for navigation, aviation, and sports analytics. Pilots and sailors must constantly convert between knots, km/h, and mph to ensure safe travel and comply with international air and maritime regulations. For motorists driving across borders, understanding local speed limits in a different unit is vital to avoid fines and accidents. In sports, analyzing the performance of sprinters, cyclists, or racing cars often involves comparing speeds recorded in different measurement systems. Accurate speed conversion ensures safety, legal compliance, and fair competitive analysis.

How to Convert Feet per Second to Miles per Hour

To convert feet per second to miles per hour, use the following formula:

mph = ft/s × 0.6818181818

Example: 1 ft/s = 0.6818181818 mph

For example, 5 ft/s = 3.409090909 mph, 10 ft/s = 6.818181818 mph, and 100 ft/s = 68.18181818 mph. For larger values, 1000 ft/s = 681.8181818 mph. Conversely, 1 mph = 1.466666667 ft/s. Our calculator above performs this conversion instantly with full precision — no rounding errors.

Common Mistakes to Avoid

  • Knots vs MPH: a Knot is faster than a Mile per Hour (1 Knot = 1.15 mph).
  • Mach numbers: speed of sound varies with temperature/altitude.
  • Pace confusion: mixing up speed (distance/time) with pace (time/distance).

Pro Tips

  • Highway math: 60 mph = 1 mile per minute. Easy for ETA calculation.
  • KPH to MPH: Multiply km/h by 0.6 to get mph (approx).
  • Light speed: Nothing travels faster than light (approx 300,000 km/s).

What is a Foot per Second?

A unit of speed in the Imperial/US Customary systems.

Often used in ballistics and fluid dynamics.

What is a Mile per Hour?

Miles per hour (mph) is a unit of speed in the Imperial and US customary systems, expressing miles traveled in one hour.

Mph is the standard unit for speed limits and vehicle speeds in the United States and the United Kingdom.

Frequently Asked Questions

Speed More Conversions

km/h → mphmph → km/hm/s → km/hkm/h → m/skn → km/hkn → mph

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