Inputs
Results
1026.952
kg/m³
1.026952
g/cm³
1.026952
Specific Gravity (≈ρ/1000)
Example shown for T=15 °C, S=35 PSU. Results update instantly.
Calculation Log
| # | Date/Time | T (°C) | Salinity (PSU) | Density (kg/m³) | Density (g/cm³) | SG |
|---|
Add rows after calculating. Export your dataset to CSV or PDF.
Formula Used (UNESCO, EOS-80, p = 0 dbar)
ρ(S,T) = ρ_w(T) + A(T)·S + B(T)·S^(3/2) + C·S² Where (T in °C, S in PSU): ρ_w(T) = 999.842594 + 6.793952e-2·T − 9.095290e-3·T² + 1.001685e-4·T³ − 1.120083e-6·T⁴ + 6.536332e-9·T⁵ A(T) = 0.824493 − 4.0899e-3·T + 7.6438e-5·T² − 8.2467e-7·T³ + 5.3875e-9·T⁴ B(T) = −5.72466e-3 + 1.0227e-4·T − 1.6546e-6·T² C = 4.8314e-4 Valid approximately for oceanic ranges: T ≈ −2 to 40 °C, S ≈ 0 to 42 PSU.
Densities reported are in-situ at atmospheric pressure using EOS-80. For high pressures, use full compressibility corrections (not included here).
How to Use
- Enter temperature and select the appropriate unit.
- Enter practical salinity in PSU (typically 30–37 in open ocean).
- Click Calculate to update density outputs.
- Click Add to Table to log the current result.
- Export your log using Export CSV or Export PDF.
- Reset to clear inputs and remove any draft table rows.
Tip: For g/cm³, divide kg/m³ by 1000. Specific gravity ≈ ρ/1000.
Example Data (S = 35 PSU)
| T (°C) | ρ (kg/m³) | ρ (g/cm³) | SG (≈ρ/1000) |
|---|---|---|---|
| -2.00 | 1,028.187 | 1.028187 | 1.028187 |
| 0.00 | 1,028.106 | 1.028106 | 1.028106 |
| 5.00 | 1,027.675 | 1.027675 | 1.027675 |
| 10.00 | 1,026.952 | 1.026952 | 1.026952 |
| 15.00 | 1,025.973 | 1.025973 | 1.025973 |
| 20.00 | 1,024.763 | 1.024763 | 1.024763 |
| 25.00 | 1,023.343 | 1.023343 | 1.023343 |
| 30.00 | 1,021.729 | 1.021729 | 1.021729 |
| 35.00 | 1,019.934 | 1.019934 | 1.019934 |
Reference only; values computed with EOS-80 at p = 0 dbar.
FAQs
Enter practical salinity in PSU (≈ g/kg). Typical open-ocean values are 30–37, estuaries vary widely.
Use °C if possible. The calculator converts °F and K to °C internally.
No. It computes density at atmospheric pressure (p = 0 dbar). For deep-water applications, apply compressibility corrections.
EOS-80 is widely used and accurate within oceanographic ranges. For highest fidelity, consider TEOS‑10 with Absolute Salinity and Conservative Temperature.
Specific gravity here is approximated as ρ / 1000 relative to ~freshwater. For precise definitions, specify a reference temperature and composition.
Yes. Add rows to the log, then use the CSV or PDF buttons to export.
Temperature −2 to 40 °C and salinity 0 to 42 PSU cover most practical cases. Values beyond may reduce validity.