Mile/h to Foot/s Converter

Enter the value that you want to convert mile/h (mi/h) to foot/s (ft/s) or foot/s to mile/h.Also written as MI/H to FT/S conversion.

1 mile/h = 1.4666667 foot/s

Formula: foot/s = mile/h value × 1.4666667

MI/H to FT/S — mile/h to foot/s

Value

mi/h

Result

14.66667ft/s

10 mile/h = 14.66667 foot/s

Popular Speed Converters:

kph to mph mph to kph knot to mph mph to knot fps to mph mph to fps meters per second to kilometers per hour kilometers per hour to meters per second

Converting Mile/h to Foot/s

The Mile/h Explained

The mile per hour (mph) is the standard speed unit for road transport in the United States, United Kingdom, and a few other countries.

US speed limits range from 25 mph in residential areas to 85 mph on some Texas highways. In motorsport, NASCAR top speeds exceed 200 mph, and Indy cars reach 240 mph. The UK uses mph for all road signs despite otherwise adopting metric. Baseball pitch speeds and hurricane categories are also measured in mph.

What is Foot/s?

The foot per second (ft/s or fps) is used in US engineering, ballistics, and some industrial applications.

Bullet muzzle velocities are commonly expressed in fps — a typical rifle bullet travels at 2,500-3,000 ft/s. The speed of sound at sea level is approximately 1,125 ft/s (343 m/s). US HVAC engineers measure air velocity in fpm (feet per minute), and hydraulic flow speeds in ft/s. The unit appears extensively in American engineering handbooks and military specifications.

Speed Unit Conversions

Speed units vary by transport mode and country. Automobiles use km/h in most countries but mph in the US and UK. Aviation uses knots worldwide. Shipping uses knots for surface speed. Physics calculations require meters per second. Wind speeds appear in km/h, mph, knots, or Beaufort scale depending on the meteorological service. Sports timing uses m/s for track events but km/h or mph for ball speeds.

mile/h to foot/s metric conversion table

0.01 mi/h	=	0.01467 ft/s
0.1 mi/h	=	0.14667 ft/s
1 mi/h	=	1.46667 ft/s
2 mi/h	=	2.93333 ft/s
3 mi/h	=	4.40000 ft/s
4 mi/h	=	5.86667 ft/s
5 mi/h	=	7.33333 ft/s
6 mi/h	=	8.80000 ft/s
7 mi/h	=	10.26667 ft/s
8 mi/h	=	11.73333 ft/s
9 mi/h	=	13.20000 ft/s
10 mi/h	=	14.66667 ft/s
11 mi/h	=	16.13333 ft/s
12 mi/h	=	17.60000 ft/s
13 mi/h	=	19.06667 ft/s
14 mi/h	=	20.53333 ft/s
15 mi/h	=	22.00000 ft/s
16 mi/h	=	23.46667 ft/s
17 mi/h	=	24.93333 ft/s
18 mi/h	=	26.40000 ft/s

19 mi/h	=	27.86667 ft/s
20 mi/h	=	29.33333 ft/s
30 mi/h	=	44.00000 ft/s
40 mi/h	=	58.66667 ft/s
50 mi/h	=	73.33333 ft/s
60 mi/h	=	88.00000 ft/s
70 mi/h	=	102.66667 ft/s
80 mi/h	=	117.33333 ft/s
90 mi/h	=	132.00000 ft/s
100 mi/h	=	146.66667 ft/s
200 mi/h	=	293.33333 ft/s
300 mi/h	=	440.00000 ft/s
400 mi/h	=	586.66667 ft/s
500 mi/h	=	733.33333 ft/s
600 mi/h	=	880.00000 ft/s
700 mi/h	=	1026.66667 ft/s
800 mi/h	=	1173.33333 ft/s
900 mi/h	=	1320.00000 ft/s
1000 mi/h	=	1466.66667 ft/s

How to Convert MI/H to FT/S (Mile/h to Foot/s)?

We can convert mile/h to foot/s by using an example.

Example:

Convert 20 Mile/h to Foot/s?

We know 1 Mile/h = 1.4666667 foot/s; 1 Foot/s = 0.6818182 mile/h.

20 mile/h = ___ft/s

20 × 1.4666667 = 29.33333 ft/s (we know 1 mile/h = 1.4666667 foot/s)

Answer:

20 mile/h = 29.33333 foot/s

How to Convert mph to ft/s (Step-by-Step)

Converting miles per hour to feet per second is essential in physics and engineering when road speeds must be used in kinematic equations with gravity (32 ft/s²). The exact conversion factor is 22/15 (≈ 1.46667).

Write down the speed value in miles per hour (mph).
Multiply the mph value by 1.46667 (or exactly 22/15).
The result is the equivalent speed in feet per second (ft/s).
This factor comes from: 5,280 feet/mile ÷ 3,600 seconds/hour = 1.46667.

💡 Tip: Easy rule: multiply mph by 1.5 for a quick estimate (about 2.3% high). For exact results, use the 22/15 ratio: multiply by 22, divide by 15.

Common mph to ft/s Conversions

Reference table for converting everyday road speeds to feet per second for physics and engineering calculations.

Mile/h	Foot/s	Note
15 mph	22 ft/s	School zone
25 mph	36.67 ft/s	Residential
30 mph	44 ft/s	City street
45 mph	66 ft/s	Urban arterial
55 mph	80.67 ft/s	Two-lane highway
60 mph	88 ft/s	Freeway
75 mph	110 ft/s	Western interstate
100 mph	146.67 ft/s	Race car / fast pitch

Solved Examples: mph to ft/s

Question 1: A car travels at 60 mph. Convert to ft/s for a stopping distance calculation.

Solution:

Formula: ft/s = mph × 22/15

= 60 × 22/15

= 1320/15

= 88 ft/s

Answer: 60 mph = 88 ft/s (the car moves 88 feet every second)

Question 2: A baseball is pitched at 100 mph. What is this in ft/s?

Solution:

ft/s = mph × 1.46667

= 100 × 1.46667

= 146.67 ft/s

Answer: 100 mph = 146.67 ft/s (pitcher's mound is 60.5 ft away — about 0.41 seconds to react)

Question 3: A driver is going 45 mph when they see a hazard. Convert to ft/s for reaction distance analysis.

Solution:

ft/s = mph × 22/15

= 45 × 22/15

= 990/15

= 66 ft/s

Answer: 45 mph = 66 ft/s (at 1.5-second reaction time, the car travels 99 feet before braking)

Question 4: Speed limit is 70 mph on the highway. How many feet does a car travel per second?

Solution:

ft/s = mph × 22/15

= 70 × 22/15

= 1540/15

= 102.67 ft/s

Answer: 70 mph = 102.67 ft/s (over 100 feet per second — one car length every 0.15 seconds)

Practice Questions

Try solving these on your own to test your understanding:

Convert 30 mph to ft/s. (Answer: 44 ft/s)
A car goes 85 mph. How many ft/s is this? (Answer: 124.67 ft/s)
Convert 20 mph (school zone) to ft/s. (Answer: 29.33 ft/s)
A fastball is thrown at 95 mph. What is this in ft/s? (Answer: 139.33 ft/s)
Convert 50 mph to ft/s. (Answer: 73.33 ft/s)

Stopping Distance Calculations

Stopping distance has two parts: reaction distance and braking distance. At 60 mph (88 ft/s), with a typical 1.5-second reaction time, a driver travels 132 feet before the brakes even engage. Then braking at 0.7g deceleration (22.5 ft/s²) takes another 172 feet to stop — total: 304 feet. At 75 mph (110 ft/s): reaction distance = 165 feet, braking = 269 feet, total = 434 feet. Converting mph to ft/s is the first step in these safety calculations used by traffic engineers and accident reconstructionists.

Reaction Time and Distracted Driving

Human reaction time averages 1.0-1.5 seconds for unexpected events. Converting speed to ft/s reveals the cost of distraction: At 30 mph (44 ft/s), a 2-second text glance covers 88 feet blind. At 60 mph (88 ft/s), the same glance covers 176 feet — more than half a football field. At 75 mph (110 ft/s), it is 220 feet. Every 15 mph faster adds 22 ft/s to your "blind travel" rate. These ft/s numbers make the danger of distracted driving viscerally clear in a way that mph alone cannot.

Physics of Gravity and Speed

US physics problems use ft/s because gravitational acceleration is a clean 32 ft/s² (compared to 9.81 m/s² in SI). A car going 60 mph (88 ft/s) has the same speed as an object that has fallen freely for 2.75 seconds (88 ÷ 32 = 2.75 s). This means hitting a wall at 60 mph is equivalent to falling from about 121 feet — roughly a 12-story building. This equivalence helps people understand crash severity: 30 mph = 4-story fall, 45 mph = 7-story fall, 75 mph = 19-story fall.

Key Takeaways

Multiply mph by 1.46667 (or exactly 22/15) to get ft/s.
60 mph = 88 ft/s — the key reference pair for physics problems.
Every 15 mph = 22 ft/s (clean multiples of the ratio).
At 60 mph, 1 second of inattention = 88 feet of uncontrolled travel.
Quick estimate: multiply mph by 1.5 for approximate ft/s.
Stopping distance calculations always start by converting mph to ft/s.

Mile/h to Foot/s Conversion Formula

foot/s = mile/h × 1.4666667

1 mile/h = 1.4666667 foot/s

1 foot/s = 0.6818182 mile/h

Reverse: mile/h = foot/s × 0.6818182

Frequently Asked Questions

How many foot/s are in 1 mile/h?

There are 1.4666667 foot/s in 1 mile/h. To convert mile/h to foot/s, multiply the value by 1.4666667.

How do I convert mile/h to foot/s?

Multiply your mile/h value by 1.4666667 to get the equivalent in foot/s. For example, 5 mile/h = 5 × 1.4666667 = 7.33333 foot/s.

How do I convert foot/s to mile/h?

Multiply your foot/s value by 0.6818182 to get the equivalent in mile/h. Alternatively, divide by 1.4666667.

What is 10 mile/h in foot/s?

10 mile/h is equal to 14.66667 foot/s.

What is 100 mile/h in foot/s?

100 mile/h is equal to 146.66667 foot/s.