Dive calculators

Do you want to know how much gas you are using? What is the maximum depth we can dive with Nitrox?

With the dive calculators simply input your data and it will mash them into the desired answer. Many settings and options are available. You can change easily from one system of measurement to another and even input from different ones in the same calculation.

A quick unit converter has also been included to help you to do the calculations.

MOD or Maximum Operating Depth

Enter the gas percentage, fraction or FO2 either in % or in decimal 0.XX. You can then choose the desired PO2.

Gas oxygen content
PO2 or Partial Pressure of Oxygen
Type of water

Best gas mix

Enter the depth and select the unit. Then select a PO2.

Enter the depth
Type of water
Select PO2 or enter a value

Converts units

To convert from one system of unit to another

Convert length
Convert pressure
Convert weight
Convert volume

END or Equivalent Narcotic Depth

Enter the depth and select the units. Enter Helium content in fraction eg: 0.40 or in percentage eg: 40.

Water type
Helium content

EAD or Equivalent Air Depth EAD

Enter the depth
Water type
Enter oxygen content


To calculate the SAC or surface Air Consumption you will need to calculate the number of bar used.

Average depth
Type of water
Time at average depth
Pressure used
Tank internal volume or size

Lift bag required gas

Enter the weight of the object and its volume. Then pick the type of water.

Volume of the object
Weight of the object
Type of water

Tank gas content

To calculate the total volume of gas in a tank according to the pressure and size.

Enter tank internal volume
Enter tank pressure

Calculate required gas

Calculate the required gas volume for the bottom time of a dive. It does not integrate ascent consumption and is used only for informative purpose.

Bottom depth
Type of water
Bottom time
Your SAC rate

Relative altitude depth

Calculate the equivalent depth between sea level and altitude. Since there is no salty body of water at altitude, fresh water is used in calculations.


The values used in the conversions and calculations

It is important to remember that 10 meters are not exactly 1 bar. There is also a slight difference between the type of water where the dives take place. This can lead to disparities.

1 meter = 3.2808399 feet
1 foot = 0.3048 meter
1 kilogram = 2.2 pounds
1 pound = 0.453592 kilogram
1 liter = 0.264172 US gallon
1 US gallon = 3.78541 liters
1 liter = 0.0353146667 cubic feet
1 cubic foot = 28.3168466 liters
1 US gallon = 0.133681 cubic foot
1 cubic foot = 7.48052 US gallons
1 bar = 14.5037738 pressure per square inch
1 pressure per square inch = 0.0689475729 bar
1 liter of fresh water = 0.97787 kilogram
1 liter of salt water = 1.03323 kilogram
1 atmosphere at sea level = 1.01325 bar
1 atmosphere at sea level = 760 mmHg
1 atmosphere at sea level = 101,325 pascal