Inch per Second to Feet per Second Converter
Speed · unit-converter
Convert Inch per Second to Feet per Second with a fixed input and output unit, step-by-step formula line, and reference tables. All calculations bridge through meters per second with fixed definitions (knot, international mile, Mach 1 = ISA sea level, Beaufort WMO bands at 10 m, vacuum c, plus linear SI and imperial rate units like km/s, fpm, ips, cm/s, and mm/s).
About Inch per Second
Inches per second is used for small mechanical motion, machining feed rates, and vibration specs.
About Feet per Second
Feet per second appears in ballistics, engineering, and some US sports contexts; it relates to imperial length per second.
How to convert inches per second to feet per second
1 inch per second equals 0.08333333333333333 feet per second in this tool (via m/s):
1 ips = (0.0254 m/s ÷ 0.3048 m/s) fps = 0.08333333333333333 fps
Each inch per second carries 0.0254 m/s and each feet per second 0.3048 m/s, so one ips equals 0.0254 ÷ 0.3048 fps.
Let v(ips) be the numeric speed in Inch per Second (ips), and v(fps) in Feet per Second (fps). Then:
v(fps) = v(ips) × (0.0254 / 0.3048)
Equivalently, divide by how many ips fit into one fps (m/s per fps divided by m/s per ips):
v(fps) = v(ips) ÷ 12.000000000000002
Examples
Example #1: Convert 10 ips to feet per second
10 ips = 10 ips × (0.0254/0.3048) fps = 0.8333333333 fps
10 ips = 10 ips ÷ 12.000000000000002 = 0.8333333333 fps
Example #2: Convert 50 ips to feet per second
50 ips = 50 ips × (0.0254/0.3048) fps = 4.1666666667 fps
50 ips = 50 ips ÷ 12.000000000000002 = 4.1666666667 fps
Summary
To convert Inch per Second to Feet per Second, multiply the value in ips by (0.0254 m/s per ips) / (0.3048 m/s per fps). Equivalently: value_fps = value_ips × (0.0254 / 0.3048). Numerically, 1 ips equals 0.08333333333333333 fps.
Relationship context
Both Inch per Second and Feet per Second are expressed as fixed multiples of meters per second in this tool. Converting multiplies by the ratio of m/s per ips to m/s per fps, so results stay consistent with SI-based definitions (international mile, knot, feet, etc.).
Conversion tables
| Inch per Second (ips) | Feet per Second (fps) |
|---|---|
| 0.1 | 0.0083333333 |
| 1 | 0.0833333333 |
| 2 | 0.1666666667 |
| 3 | 0.25 |
| 4 | 0.3333333333 |
| 5 | 0.4166666667 |
| 6 | 0.5 |
| 7 | 0.5833333333 |
| 8 | 0.6666666667 |
| 9 | 0.75 |
| Inch per Second (ips) | Feet per Second (fps) |
|---|---|
| 10 | 0.8333333333 |
| 20 | 1.6666666667 |
| 30 | 2.5 |
| 40 | 3.3333333333 |
| 50 | 4.1666666667 |
| 60 | 5 |
| 70 | 5.8333333333 |
| 80 | 6.6666666667 |
| 90 | 7.5 |
| 100 | 8.3333333333 |