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Bubble-O-Meter Flow Calculator

  1. Select the stage volume from the dropdown menu or input the volume from your A2LA Certificate.
  2. Record the time (in seconds) it takes for the bubble to travel the selected volume.
  3. Click the Calculate Flow button to see your flow rate at the observed conditions.
  1. First, select the correct Bubble-O-Meter from the drop-down menu.
  2. Place a zero at the starting point and enter the time (in seconds) that the bubble passes each calibration mark.
  3. If you skip a calibration mark, leave that box in the diagram empty.
  4. Click the Calculate Flow button to see your flow rate at the observed conditions.

Select Measurement Volume

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Recorded Time (seconds)

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Select a Bubble-O-Meter

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Note: These flow rates are at ambient temperature and pressure and are not corrected for the vapor pressure of water.

Click here to correct the observed flow rate to standard conditions of temperature (0ºC, 32ºF) and pressure (760mmHg, 29.92inHg)

Adjust Flow Rate
Temperature:
Barometric Pressure:

Stage Flow Rate (Adjusted)
0.01ml - 0.1ml -
0.01ml - 1ml -
0.1ml - 1ml -
Stage Flow Rate (Adjusted)
0ml - 1ml -
0ml - 10ml -
1ml - 10ml -
Stage Flow Rate (Adjusted)
0ml - 1ml -
0ml - 10ml -
0ml - 100ml -
1ml - 10ml -
1ml - 100ml -
10ml - 100ml -
Stage Flow Rate (Adjusted)
0ml - 1ml -
0ml - 10ml -
0ml - 500ml -
1ml - 10ml -
1ml - 500ml -
10ml - 500ml -
Stage Flow Rate (Adjusted)
0ml - 10ml -
0ml - 100ml -
0ml - 1000ml -
10ml - 100ml -
10ml - 1000ml -
100ml - 1000ml -
Stage Flow Rate (Adjusted)
0ml - 25ml -
0ml - 50ml -
0ml - 75ml -
0ml - 100ml -
25ml - 50ml -
25ml - 75ml -
25ml - 100ml -
50ml - 75ml -
50ml - 100ml -
75ml - 100ml -
Stage Flow Rate (Adjusted)
0ml - 125ml -
0ml - 250ml -
0ml - 375ml -
0ml - 500ml -
125ml - 250ml -
125ml - 375ml -
125ml - 500ml -
250ml - 375ml -
250ml - 500ml -
375ml - 500ml -
Stage Flow Rate (Adjusted)
0ml - 250ml -
0ml - 500ml -
0ml - 750ml -
0ml - 1000ml -
250ml - 500ml -
250ml - 750ml -
250ml - 1000ml -
500ml - 750ml -
500ml - 1000ml -
750ml - 1000ml -
Stage Flow Rate (Adjusted)
0ml - 500ml -
0ml - 1000ml -
0ml - 1500ml -
0ml - 2000ml -
500ml - 1000ml -
500ml - 1500ml -
500ml - 2000ml -
1000ml - 1500ml -
1000ml - 2000ml -
1500ml - 2000ml -
Stage Flow Rate (Adjusted)
0ml - 500ml -
0ml - 1000ml -
0ml - 1500ml -
0ml - 2000ml -
500ml - 1000ml -
500ml - 1500ml -
500ml - 2000ml -
1000ml - 1500ml -
1000ml - 2000ml -
1500ml - 2000ml -

Adjusted to standard conditions of temperature (0°C, 32°F) and pressure (760mmHg, 29.92inHg).

Average Flow Rate (Adjusted)
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