Feet per Second to Inch per Second Converter
Speed · unit-converter
Convert Feet per Second to Inch 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 Feet per Second
Feet per second appears in ballistics, engineering, and some US sports contexts; it relates to imperial length per second.
About Inch per Second
Inches per second is used for small mechanical motion, machining feed rates, and vibration specs.
How to convert feet per second to inches per second
1 feet per second equals 12.000000000000002 inch per second in this tool (via m/s):
1 fps = (0.3048 m/s ÷ 0.0254 m/s) ips = 12.000000000000002 ips
Each feet per second carries 0.3048 m/s and each inch per second 0.0254 m/s, so one fps equals 0.3048 ÷ 0.0254 ips.
Let v(fps) be the numeric speed in Feet per Second (fps), and v(ips) in Inch per Second (ips). Then:
v(ips) = v(fps) × (0.3048 / 0.0254)
Equivalently, divide by how many fps fit into one ips (m/s per ips divided by m/s per fps):
v(ips) = v(fps) ÷ 0.08333333333333333
Examples
Example #1: Convert 10 fps to inch per second
10 fps = 10 fps × (0.3048/0.0254) ips = 120 ips
10 fps = 10 fps ÷ 0.08333333333333333 = 120 ips
Example #2: Convert 50 fps to inch per second
50 fps = 50 fps × (0.3048/0.0254) ips = 600 ips
50 fps = 50 fps ÷ 0.08333333333333333 = 600 ips
Summary
To convert Feet per Second to Inch per Second, multiply the value in fps by (0.3048 m/s per fps) / (0.0254 m/s per ips). Equivalently: value_ips = value_fps × (0.3048 / 0.0254). Numerically, 1 fps equals 12.000000000000002 ips.
Relationship context
Both Feet per Second and Inch per Second are expressed as fixed multiples of meters per second in this tool. Converting multiplies by the ratio of m/s per fps to m/s per ips, so results stay consistent with SI-based definitions (international mile, knot, feet, etc.).
Conversion tables
| Feet per Second (fps) | Inch per Second (ips) |
|---|---|
| 0.1 | 1.2 |
| 1 | 12 |
| 2 | 24 |
| 3 | 36 |
| 4 | 48 |
| 5 | 60 |
| 6 | 72 |
| 7 | 84 |
| 8 | 96 |
| 9 | 108 |
| Feet per Second (fps) | Inch per Second (ips) |
|---|---|
| 10 | 120 |
| 20 | 240 |
| 30 | 360 |
| 40 | 480 |
| 50 | 600 |
| 60 | 720 |
| 70 | 840 |
| 80 | 960 |
| 90 | 1,080 |
| 100 | 1,200 |