Table:
0
A
B
C
D
E
1
Vacuum range
Pressure in hPa (mbar)
Molecules / cm 3
Molecules / m 3
Mean free path
2
Ambient pressure
1013
2.7 × 10 19
2.7 × 10 25
68 nm
3
Low vacuum
300 – 1
10 19 – 10 16
10 25 – 10 22
0.1 – 100 μm
4
Medium vacuum
1 – 10 −3
10 16 – 10 13
10 22 – 10 19
0.1 – 100mm
5
High vacuum
10 −3 – 10 −7
10 13 – 10 9
10 19 – 10 15
10cm – 1km
6
Ultra high vacuum
10 −7 – 10 −12
10 9 – 10 4
10 15 – 10 10
1km – 10 5 km

Questions and formulas:
Question: What is the pressure in ultra high vacuum?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1="Ultra high vacuum"),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E6,A2:A6="Ultra high vacuum"),2))
Level: medium