Are these oceanography calculators free to use?

Yes! All oceanography calculator tools on this page are completely free to use for anyone, including students, marine scientists, researchers, and ocean enthusiasts. No registration or payment is required.

What oceanography calculations can I perform with these free tools?

Our free oceanography calculators include: Salinity Converter (PSU, ppt, g/kg), Water Pressure by Depth Calculator, Seawater Density Calculator (based on temperature, salinity, and pressure), Wave Period & Wavelength Calculator, and Ocean Surface Area Calculator.

How accurate are the oceanography calculator results?

Our calculators use scientifically validated formulas including the UNESCO equation of state for seawater density and standard oceanographic principles. The results are highly accurate for educational and professional applications in marine science.

Can I use these calculators on my mobile phone?

Yes! All oceanography calculators feature responsive design and work seamlessly on mobile phones, tablets, and desktop computers. The interface automatically adapts to your screen size.

Do the calculators support both metric and imperial units?

Yes, where applicable, our free oceanography calculators support both metric and imperial units. You can easily select your preferred unit system for measurements like depth (meters/feet) and area (square kilometers/square miles).

Free Oceanography Calculator Tools - Salinity, Pressure, Density & Wave Calculators

About These Free Oceanography Tools

Welcome to our comprehensive suite of free oceanography calculators! Whether you're a marine science student, professional oceanographer, or simply curious about the ocean, these tools provide accurate calculations based on established scientific formulas.

How to use: Select a calculator from the tabs below, enter your values, and click Calculate to get instant results. All calculations are performed locally in your browser with high precision.

Salinity Converter

Convert between different salinity units used in oceanography. Salinity is a measure of dissolved salts in seawater. This calculator converts between Practical Salinity Units (PSU), parts per thousand (ppt), and grams per kilogram (g/kg). Standard ocean salinity is approximately 35 PSU.

Input Value

Input Unit

Water Pressure by Depth Calculator

Calculate water pressure at various ocean depths. This calculator determines the total pressure (including atmospheric pressure) at any depth in the ocean. Pressure increases approximately 1 atmosphere (101.325 kPa) for every 10 meters of depth. Useful for diving, submarine operations, and marine biology research.

Depth (meters)

Salinity (PSU) - Optional

Temperature (°C) - Optional

Seawater Density Calculator

Calculate seawater density based on temperature, salinity, and pressure. This calculator uses the UNESCO equation of state for seawater to compute density. Seawater density typically ranges from 1020-1029 kg/m³ and is crucial for understanding ocean circulation, buoyancy, and stratification.

Temperature (°C)

Salinity (PSU)

Pressure (dbar) 1 dbar ≈ 1 meter depth. Surface pressure = 0 dbar.

Wave Period & Wavelength Calculator

Calculate wave properties using wave mechanics formulas. This calculator uses the dispersion relation for ocean waves to compute wavelength, period, frequency, phase velocity, and group velocity. Enter any two known properties to calculate the rest. Valid for deep-water and intermediate-depth waves.

Calculation Mode

Wave Period (seconds)

Water Depth (meters)

Ocean Surface Area Calculator

Calculate areas of different ocean regions or custom polygons. This calculator helps you compute ocean surface areas using either pre-defined ocean basins or custom coordinates. Useful for estimating coverage areas, planning research expeditions, or educational purposes.

Calculation Type

Select Ocean