Pump-up Time Test: Monitoring Performance from Tank Fill Time

Air compressor pump-up test time calculators estimate how long it will take your air compressor to fill your tank from a low pressure (cut-in PSI) to a higher pressure (cut-out PSI). This is an easy way to troubleshoot a range of compressor issues and ensure proper performance.

What This Calculator Helps You Do

• Estimate how fast your compressor can build pressure
• Compare expected vs actual performance
• Detect performance drop-offs due to leaks, wear, or mechanical issues
• Determine if your compressor is still properly sized for your application
• Log historical performance as part of preventative maintenance (bookmark this page now!)

How to Use this Calculator

This calculator requires four inputs:

• Tank Size (gallons)
• Cut-in Pressure (PSI)
• Cut-out Pressure (PSI)
• Compressor CFM

This calculator works off the following formula:

• Pump-Up Time = (Tank Size × (Cut-out PSI - Cut-in PSI)) / (7.48 × 14.7 × Compressor CFM)

What the Result Tells You

The result is the estimated time (in minutes and seconds) your compressor needs to fill your tank from the cut-in pressure to the cut-out pressure.

When to Use This Calculator

• Assist in troubleshooting and test real performance to manufacturer specs
• When selecting a new compressor or tank to ensure right-sizing
• During regular maintenance to help track performance over time

What to Do With Results

Once you’ve calculated an estimated compressor pump-up time, compare it to the actual real-world pump-up time. If your measured pump-up time is close to the rated time, your system is likely functioning properly. If your real-world pump-up time is much slower than the calculator predicts, check for air leaks, dirty filters, or aging valves.

If you're still not meeting performance expectations after addressing basic issues, it might be time to consider replacing your current compressor or upgrading to a higher CFM model.

To start troubleshooting, see our full lineup of replacement air intake filters and silencers, and rebuild kits for better performance, faster fill times, and improved efficiency. Or call us at (402) 744-6322 for help selecting a replacement compressor or pump.

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Disclaimer: This calculator is provided for general informational purposes only. While we strive for accuracy, results depend on the information you enter and may not reflect all real-world conditions. This tool and any related materials are provided “as-is” without warranties of any kind. Always verify measurements and specifications before purchasing, installing, or operating equipment. We are not responsible for any damages or issues arising from use of this information.