Volumetric flow rate.
Cup per Days to Cubic yard per Seconds Converter — cup/d to yd3/s
Convert Cup per Days (cup/d) to Cubic yard per Seconds (yd3/s) using the exact conversion factor (1 cup per days = 3.581548e-9 cubic yard per seconds). See the formula, worked examples, and conversion table.
Cup per Days to Cubic yard per Seconds converter
Converter
Flow Rate Converter
Convert volumetric flow rates across metric, US, imperial, industrial, and scientific units.
Context values
Some unit families need one extra value for a physically accurate result.
Volumetric flow rate.
Result = input x 2.73828977e-9 / 0.764554858.
Flow rate uses cubic meters per second as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Cup per Days to Cubic yard per Seconds
Cup per Days and Cubic yard per Seconds both measure volumetric flow rate — how much volume passes a point over time — used to size pipes and pumps, monitor river or stream discharge, control industrial processes, and set medical infusion rates. Both are volumetric flow rate units.
Formula
cubic yard per seconds = cup per days × 3.581548e-9
This factor comes from each unit's defined relationship to the category's base unit: 1 cup per days equals 2.73829e-9 base units, and 1 cubic yard per seconds equals 0.764554857984 base units, so dividing one by the other gives the direct cup per days-to-cubic yard per seconds factor of 3.581548e-9.
Simple example
1 cup/d × 3.581548e-9 = 3.581548e-9 yd3/s
1 cup per days = 3.581548e-9 cubic yard per seconds.
Real-world example
60 cup/d × 3.581548e-9 = 2.148929e-7 yd3/s
60 cup per days = 2.148929e-7 cubic yard per seconds.
Conversion table
| Cup per Days (cup/d) | Cubic yard per Seconds (yd3/s) |
|---|---|
| 0.1 cup/d | 3.581548e-10 yd3/s |
| 1 cup/d | 3.581548e-9 yd3/s |
| 10 cup/d | 3.581548e-8 yd3/s |
| 60 cup/d | 2.148929e-7 yd3/s |
| 100 cup/d | 3.581548e-7 yd3/s |
| 1,000 cup/d | 0.0000035815 yd3/s |
Reverse conversion: Cubic yard per Seconds to Cup per Days
3.581548e-9 yd3/s × 279208893.5 = 1.000000054 cup/d
3.581548e-9 cubic yard per seconds = 1.000000054 cup per days.
cup per days = cubic yard per seconds × 279208893.506
For a page dedicated to this direction, see Cubic yard per Seconds to Cup per Days.
Understanding the Cup per Days (cup/d)
Volumetric flow rate.
Understanding the Cubic yard per Seconds (yd3/s)
Volumetric flow rate.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many cubic yard per seconds are in 1 cup per days?
1 cup per days equals 3.581548e-9 cubic yard per seconds, using the exact defined conversion factor rather than an estimate.
How do I convert cup per days to cubic yard per seconds?
Multiply the cup per days value by 3.581548e-9. The converter above does this instantly to whatever precision you set.
How do I convert cubic yard per seconds back to cup per days?
Use the reverse factor: 1 cubic yard per seconds equals 279,208,893.5 cup per days. You can also use the swap control in the converter above to flip the direction instantly.
What is a cup per days?
Cup per Days (cup/d) is a unit of flow rate.
What is a cubic yard per seconds?
Cubic yard per Seconds (yd3/s) is a unit of flow rate.
Is the cup per days to cubic yard per seconds conversion exact?
Yes. Both cup per days and cubic yard per seconds are defined by fixed standards rather than physical artifacts, so the factor of 3.581548e-9 used above is exact to as many digits as you choose to display.
What's the difference between volumetric and mass flow rate?
Volumetric flow rate measures the volume of fluid passing a point per unit time (for example, liters per second). Mass flow rate measures the mass instead. For a fluid of constant density the two are directly proportional, but for compressible fluids like gases, mass flow is often the more meaningful quantity.