Centrifuge Doubling Time Estimator

1. Set the current processed volume
Enter the cumulative sample volume already completed in the period you are tracking.

2. Enter effective throughput
Use an observed average rate that reflects actual centrifuge cycling and handling time.

3. Read the doubling time
The result shows how many additional hours are required to process another volume equal to the current total.

4. Review the target volume
The target is exactly twice the current cumulative processed volume.

5. Recalculate when workflow changes
Update the rate if rotor loading, spin program, staffing, or turnaround changes materially.

Target cumulative volume = 2 × Current cumulative volume
Additional volume required = Current cumulative volume
Doubling time = Current cumulative volume / Effective processing rate

Where:

• Current cumulative volume = sample volume already processed
• Effective processing rate = average processed volume per hour
• Doubling time = additional hours required to reach twice the current cumulative volume

Assumptions: The processing rate is treated as constant over the forecast period and should include practical cycle overhead if that overhead affects real throughput.

What the result means

At the stated effective rate, another 720 mL can be processed in four hours, bringing the cumulative total to 1,440 mL.

Use the result as a planning or calculation aid and confirm protocol-specific assumptions before laboratory use.

Given

• Current cumulative processed volume = 720 mL
• Effective processing rate = 180 mL/h

Calculation
Target volume = 2 × 720 = 1,440 mL
Additional volume = 720 mL
Doubling time = 720 / 180 = 4 h

Result
4 hours.

Interpretation
At the stated effective rate, another 720 mL can be processed in four hours, bringing the cumulative total to 1,440 mL.