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Confused about lung volume

Thread Status: Hello , There was no answer in this thread for more than 60 days.
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New Member
Feb 28, 2005
1) I did full packing and did a full exhale (no negative packing) and I measured my volume to roughly 6.2L.

2) I repeated the process but without packing, just a full inhale and full exhale (no negative packing) and I measured 5.5L.

Now my question is which of this two measurements would be considered my true VC (vital capacity). I have read that RC (residual capacity) is roughly 25% of the TLC (total lung capacity). So I am trying to estimate what my TLC is but I don't know which of the two VC measurements is the real one (with or without packing)?

So that means 8.0L packing, and 7.33L no packing. Please correct me if any of this is wrong :duh. Do my estimates sound reasonably? (I am 6'1").

Many thanks!
Last edited:
Medical science does not know about packing. All guidelines in textbooks about lung volumes are assuming no packing.
Ah thanks Eric makes sense. So I guess my RV would be 25% of no packing VC. Do these TLC numbers for a beginner sound reasonable to you?

TLC (packing) = 8L
TLC (no packing) = 7.33L
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