1. What is a Specific Gravity to Salinity Calculator?

Definition: This calculator estimates water salinity from specific gravity measurements.

Purpose: It helps marine researchers, aquarists, and water quality professionals determine salinity levels quickly.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( S \) — Salinity (grams per kilogram)
• \( SG \) — Specific gravity (unitless)

Explanation: The formula approximates salinity by comparing the density of water to pure water and scaling the difference.

3. Importance of Salinity Measurement

Details: Salinity affects water density, marine life health, and various chemical processes in aquatic environments.

4. Using the Calculator

Tips: Enter the specific gravity reading (must be ≥ 1). The calculator will output salinity in g/kg.

5. Frequently Asked Questions (FAQ)

Q1: What is specific gravity?
A: Specific gravity is the ratio of a substance's density to the density of pure water at 4°C.

Q2: Why multiply by 1250?
A: This factor converts the density difference to practical salinity units (g/kg).

Q3: What's the accuracy of this formula?
A: It's a simplified approximation. For precise measurements, use calibrated instruments.

Q4: What's typical seawater salinity?
A: Average ocean salinity is about 35 g/kg (specific gravity ~1.028).

Q5: Does temperature affect the calculation?
A: Yes, but this simplified formula assumes standard conditions (15-25°C).