Simple, free calculators and converters for divers and travellers that work right in your browser.
Popular
- Dive Trip Packing ChecklistBuild a tick-off dive trip checklist for tropical or cold water, own or rental gear, resort or remote locations.
Calculate your gas and kit
- Nitrox MOD CalculatorFind the maximum operating depth in metres and feet for any nitrox mix and PO2 limit.
- SAC Rate CalculatorTurn tank size, pressure used, dive time and average depth into your SAC and RMV in litres or cubic feet per minute.
- Tank Air Duration CalculatorEstimate how many minutes a cylinder will last at a given depth from tank size, pressure, reserve and your air consumption.
Convert units
- Scuba Tank Size ConverterConvert a scuba cylinder between rated cubic feet and water capacity in litres, using its working pressure.