Convert Cubic feet per second to Cubic inches per second
Convert Cubic feet per second (ft³/s) to Cubic inches per second (in³/s) instantly and accurately.
Conversion Formula
in³/s = ft³/s × 1728
About Cubic feet per second
The cubic foot per second (ft³/s or cfs) equals 0.028316846592 m³/s, the primary unit for measuring river discharge and open-channel flow in the United States. The US Geological Survey publishes all streamflow data in cfs; irrigation water rights, flood-control gates, and dam spillway capacities are specified in cfs. The Colorado River at full natural flow is ≈22 000 cfs. 1 cfs = 0.028316846592 m³/s ≈ 28.317 L/s ≈ 448.8 US gpm.
About Cubic inches per second
The cubic inch per second (in³/s) equals 1.6387064×10⁻⁵ m³/s, used in US automotive engineering for engine displacement sweep rate, fuel-injector calibration, and hydraulic actuator speed specifications. An engine injector delivering 15 in³/s of fuel corresponds to roughly 15.5 mL/s; hydraulic jacks in US equipment are rated in in³/s at operating pressure. 1 in³/s ≈ 1.639×10⁻⁵ m³/s = 0.016387 L/s.
Quick Reference Table
| Cubic feet per second (ft³/s) | Cubic inches per second (in³/s) |
|---|---|
| 1 ft³/s | 1728 in³/s |
| 2 ft³/s | 3456 in³/s |
| 5 ft³/s | 8640 in³/s |
| 10 ft³/s | 17280 in³/s |
| 25 ft³/s | 43200 in³/s |
| 50 ft³/s | 86400 in³/s |
| 100 ft³/s | 172800 in³/s |