Need to compare a tiny lab pump’s output with a garden‑sprinkler’s flow? Converting cubic centimeters per second (cm³/s) to gallons per second (gal/s) lets you speak the same language, whether you’re measuring a medical device or a household appliance.
Volume Flow Rate: The Measure That Binds Them
Both units belong to the volume flow rate family. This measure tells us how much space a fluid occupies as it moves each second. It’s the “speed” of volume, not distance.
What Is a Cubic Centimeter Per Second?
A cubic centimeter (cm³) is the volume of a 1 cm × 1 cm × 1 cm cube—roughly the size of a small pea. When we say cm³/s, we mean that many peas of fluid pass a point every second. It’s a common unit in laboratory work, automotive fuel‑system testing, and small‑scale hydraulics.
What Is a Gallon Per Second?
A gallon (gal) is a larger, everyday volume unit. In the United States, one liquid gallon equals 3,785.411784 cm³. Gallons per second are used for household water‑flow specs, industrial pumps, and irrigation systems.
Exact Conversion Factor
The internationally accepted relationship is:
1 cm³/s = 0.000264172052 gal/s
To convert from cm³/s to gal/s, multiply by this factor. To go the other way, divide by the same number.
Conversion Formula
gal/s = cm³/s × 0.000264172052
For a reverse conversion:
cm³/s = gal/s ÷ 0.000264172052
Step‑by‑Step Example
Imagine a medical infusion pump delivers 250 cm³ of fluid each second. How many gallons per second is that?
- Write down the known value: 250 cm³/s.
- Apply the formula: 250 × 0.000264172052 = 0.066043013 gal/s.
- Round to four significant digits for readability: **0.06604 gal/s**.
So the pump’s flow is roughly 0.066 gal/s—about the same as a slow‑dripping faucet.
Cubic Centimeter Per Second to Gallon Per Second Conversion Table
Each row applies the same rule: multiply the value in cm³/s by 0.000264172052 to obtain the equivalent flow in gal/s. Values are rounded to four significant digits.
| Cubic Centimeter Per Second (cm³/s) | Gallon Per Second (gal/s) |
|---|---|
| 1 cm³/s | 0.0002642 gal/s |
| 2 cm³/s | 0.0005283 gal/s |
| 5 cm³/s | 0.001321 gal/s |
| 10 cm³/s | 0.002642 gal/s |
| 20 cm³/s | 0.005283 gal/s |
| 50 cm³/s | 0.01321 gal/s |
| 100 cm³/s | 0.02642 gal/s |
| 500 cm³/s | 0.1321 gal/s |
Practical Applications
- Medical devices: Verify that infusion rates meet prescribed dosages.
- Automotive engineering: Compare fuel‑injector flow with engine‑capacity specifications.
- Home improvement: Size a water‑pump by converting a small‑scale test (cm³/s) to the household standard (gal/s).
- Environmental monitoring: Translate sensor data from scientific units to the units used by municipal water authorities.
Key Takeaway
One cubic centimeter per second equals 0.000264172052 gallons per second. Use the simple multiplication rule to switch between the two, and you’ll be able to compare tiny laboratory flows with everyday water‑usage numbers in seconds.
Ready to convert more flow rates? Explore our other volume‑flow tools and make every measurement count.