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Salinity/TDS Converter

🌊 Convert between salinity and TDS units with precision and ease. Your ultimate companion for oceanography and water quality! 💧

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Common Conversions
Quick access to frequently used conversions
Unit Information

Scientific Units

Scientific and technical measurements

PSU
scientific
Practical Salinity Units
Base unit - Practical Salinity Units based on electrical conductivity
g/kg
scientific
Grams per Kilogram
Mass ratio of dissolved salts to seawater (1 g/kg ≈ 1.0049 PSU)
ppt
scientific
Parts per Thousand
Parts per thousand (‰) - equivalent to g/kg
kg/m³
scientific
Kilograms per Cubic Meter
Mass concentration in kg/m³ (at seawater density ≈ 1025 kg/m³)
mg/L
scientific
Milligrams per Liter
Mass concentration in mg/L (1 mg/L ≈ 0.001 PSU)
g/L
scientific
Grams per Liter
Mass concentration in g/L (1 g/L ≈ 1.0049 PSU)
ppm
scientific
Parts per Million
Parts per million (1 ppm ≈ 0.001 PSU)
ppb
scientific
Parts per Billion
Parts per billion (1 ppb ≈ 0.000001 PSU)
S/m
scientific
Siemens per Meter
Electrical conductivity (1 S/m ≈ 0.5 PSU)
mS/cm
scientific
Millisiemens per Centimeter
Electrical conductivity (1 mS/cm ≈ 0.05 PSU)
μS/cm
scientific
Microsiemens per Centimeter
Electrical conductivity (1 μS/cm ≈ 0.00005 PSU)

Other Units

Specialized and historical measurements

°Bé
other
Baumé Degrees
Baumé scale for liquid density (1°Bé ≈ 1.8 PSU)
°Bx
other
Brix Degrees
Brix scale for sugar content (1°Bx ≈ 1.8 PSU)
SG
other
Specific Gravity
Specific gravity relative to pure water (1.025 SG ≈ 25.7 PSU)
n
other
Refractive Index
Refractive index (1.34 n ≈ 200 PSU)
Preferences

Salinity/TDS Converter

Our Salinity/TDS Converter provides accurate conversions between various salinity and total dissolved solids units. Whether you're working with Practical Salinity Units (PSU), grams per kilogram (g/kg), milligrams per liter (mg/L), or other salinity measurements, this tool delivers precise results instantly.

Supported Unit Categories:

  • Practical Salinity Units (PSU): Standard oceanographic salinity measurement
  • Mass-based Units: Grams per kilogram (g/kg), parts per thousand (ppt)
  • Concentration Units: Milligrams per liter (mg/L), parts per million (ppm)
  • Conductivity Units: Siemens per meter (S/m), microsiemens per centimeter (μS/cm)

Salinity Measurement Systems:

  • PSU (Practical Salinity Units): Based on electrical conductivity, used in oceanography
  • g/kg (Grams per Kilogram): Mass ratio of dissolved salts to seawater
  • mg/L (Milligrams per Liter): Mass concentration of dissolved solids
  • ppt (Parts per Thousand): Traditional salinity measurement (‰)

Common Conversions:

  • 35 PSU ≈ 35 g/kg ≈ 35,000 mg/L (typical ocean salinity)
  • 0 PSU = 0 g/kg = 0 mg/L (freshwater)
  • 1 PSU ≈ 1 g/kg ≈ 1,000 mg/L
  • 1 g/kg = 1,000 mg/L (at 4°C, density ≈ 1 g/cm³)

How to Use:

  1. Enter the salinity or TDS value you want to convert
  2. Select the source unit from the "From" dropdown
  3. Select the target unit from the "To" dropdown
  4. View the converted result instantly
  5. Use the swap button to quickly reverse the conversion

Applications:

This salinity/TDS converter is essential for oceanographers, marine biologists, environmental scientists, water quality professionals, aquarists, and anyone working with saline water or dissolved solids. It's particularly useful for research, monitoring, aquaculture, and educational purposes.