Ever needed to compare a pump’s output in the units you learned in school with the units used on a U.S. spec sheet? Converting cubic inches per second to centilitres per second bridges that gap, letting engineers, technicians, and hobbyists speak the same language.
Understanding Volume Flow Rate
Volume flow rate measures how much space a fluid occupies as it moves each second. It belongs to the broader “Volume” family, but adds the time dimension. Think of water rushing through a garden hose or air circulating in a ventilation duct – both are volume flow rates.
What is a Cubic Inch per Second (in³/s)?
A cubic inch per second tells you how many cubic inches of fluid pass a point every second. One cubic inch equals 16.387064 cm³, so this unit is common in U.S. engineering documents, especially for small‑scale pumps and pneumatic devices.
What is a Centilitre per Second (cl/s)?
A centilitre per second is the metric counterpart. One centilitre equals 10 cm³. This unit appears in laboratory equipment, medical infusion devices, and many European specifications.
Exact Conversion Factor
The relationship is fixed by the definitions of the two volume units:
- 1 in³ = 16.387064 cm³
- 1 cl = 10 cm³
Therefore:
1 in³/s = 1.6387064 cl/s
The formula is simple:
cl/s = in³/s × 1.6387064
Step‑by‑Step Conversion Example
Suppose a small air compressor is rated at 25 in³/s. To express this in centilitres per second:
- Write down the factor: 1 in³/s = 1.6387064 cl/s.
- Multiply the source value by the factor: 25 × 1.6387064 = 40.96766.
- Round to a practical precision (four decimal places): 40.9677 cl/s.
Result: 25 in³/s ≈ 40.9677 cl/s. The same steps work for any value.
When Do You Need This Conversion?
- HVAC design: U.S. manufacturers often list fan capacities in in³/s, while international standards use cl/s or litres per second.
- Medical devices: Infusion pumps may be calibrated in cl/s, but a supplier’s datasheet could be in in³/s.
- Laboratory work: Researchers converting flow‑meter readings from a U.S. instrument to metric reporting.
- DIY projects: Hobbyists adapting a U.S. pump for a metric‑based aquarium system.
Cubic Inch Per Second to Centilitre Per Second Conversion Table
Each row applies the same rule: multiply cubic inches per second by 1.6387064 to obtain centilitres per second. Values are rounded to four decimal places for readability.
| Cubic Inch per Second (in³/s) | Centilitre per Second (cl/s) |
|---|---|
| 1 in³/s | 1.6387 cl/s |
| 2 in³/s | 3.2774 cl/s |
| 5 in³/s | 8.1935 cl/s |
| 10 in³/s | 16.3871 cl/s |
| 20 in³/s | 32.7741 cl/s |
| 50 in³/s | 81.9353 cl/s |
| 100 in³/s | 163.8706 cl/s |
| 500 in³/s | 819.3532 cl/s |
Key Takeaway
One cubic inch per second equals 1.6387064 centilitres per second. With a single multiplication, you can translate any U.S. flow‑rate figure into a metric one, making cross‑border projects smoother and data easier to compare.
Ready to convert more flow‑rate values? Plug the factor into your spreadsheet or calculator and let the numbers do the work.