Meters of seawater to feet of seawater
Type a value in msw to get it in fsw instantly.
99fsw
That's 1.43× as deep as an open water dive, while the recreational limit is 1.25× deeper. A lungful of surface air would be squeezed to about one 4th of its volume.
What it means
How much pressure is that?
Seawater adds one atmosphere every 10 m; fresh water needs 10.3 m for the same, because it is less dense.
The math
How to convert msw to fsw
Depth adds to the atmosphere already above you: ATA = depth in msw ÷ 10 + 1, and in feet ATA = fsw ÷ 33 + 1.
Example: 30 msw = 99 fsw.
Every unit
Your depth in every unit
Tables
msw to fsw conversion table
| msw | fsw |
|---|---|
| 0 msw | 0 fsw |
| 5 msw | 16.5 fsw |
| 10 msw | 33 fsw |
| 15 msw | 49.5 fsw |
| 20 msw | 66 fsw |
| 30 msw | 99 fsw |
| 40 msw | 132 fsw |
| 50 msw | 165 fsw |
| 60 msw | 198 fsw |
| 100 msw | 330 fsw |
| 200 msw | 660 fsw |
fsw to msw conversion table
| fsw | msw |
|---|---|
| 0 fsw | 0 msw |
| 5 fsw | 1.51515 msw |
| 10 fsw | 3.0303 msw |
| 15 fsw | 4.54545 msw |
| 20 fsw | 6.06061 msw |
| 30 fsw | 9.09091 msw |
| 40 fsw | 12.1212 msw |
| 50 fsw | 15.1515 msw |
| 60 fsw | 18.1818 msw |
| 100 fsw | 30.303 msw |
| 200 fsw | 60.6061 msw |
Quick answers
Quick answers
- How many fsw is 1 msw?
- 1 msw is 3.3 fsw.
- How many fsw is 10 msw?
- 10 msw is 33 fsw.
- How many fsw is 30 msw?
- 30 msw is 99 fsw.
The units
About these units
Meters of seawater (msw)
Depth in the sea. Every 10 m adds one atmosphere.
Feet of seawater (fsw)
The US measure: 33 feet to the atmosphere.
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