The Conductivity to TDS Calculator is a tool designed to convert electrical conductivity (EC) measurements into total dissolved solids (TDS) values. Conductivity measures the ability of water to conduct electricity, while TDS indicates the concentration of dissolved salts and minerals in water. The relationship between these two parameters makes it possible to estimate the quality of water in terms of its mineral content.
This calculator is particularly useful in water quality testing, environmental monitoring, and industrial applications such as aquariums, agriculture, and beverage production. By using this tool, users can quickly assess water purity and suitability for various applications.
Formula of Conductivity To Tds Calculator
The calculator uses the following key formulas for the conversion:
General Formula
TDS = k × Conductivity (EC)
Where:
- TDS is in milligrams per liter (mg/L) or parts per million (ppm).
- Conductivity (EC) is in microsiemens per centimeter (µS/cm).
- k is the conversion factor, which typically ranges between 0.5 and 0.7 depending on the water composition.
If the Conversion Factor (k) Is Unknown
If the exact value of k is not provided, it can be calculated using experimental data:
k = TDS / Conductivity (EC)
Where:
- TDS and Conductivity values are known from measurements.
The factor k depends on the specific composition of dissolved solids in the water, making it important to use accurate data for precise calculations.
Reference Table for Quick Use
Below is a table showing typical TDS values corresponding to different conductivity readings for commonly used conversion factors (k). This table provides an easy reference for users to estimate TDS without performing calculations.
| Conductivity (µS/cm) | Conversion Factor (k) | TDS (ppm) or (mg/L) |
|---|---|---|
| 50 | 0.5 | 25 |
| 100 | 0.6 | 60 |
| 200 | 0.7 | 140 |
| 500 | 0.5 | 250 |
| 1000 | 0.7 | 700 |
This table simplifies the estimation process for various scenarios, enhancing the utility of the calculator.
Example of Conductivity To Tds Calculator
Problem:
A water sample has an electrical conductivity of 300 µS/cm. Calculate the TDS value using a conversion factor of 0.6.
Solution:
- Use the formula: TDS = k × Conductivity
- Substitute the given values: TDS = 0.6 × 300
- Perform the calculation: TDS = 180 ppm (mg/L)
Thus, the total dissolved solids in the water sample are 180 ppm.
Extended Example:
If the TDS is known to be 500 ppm and the conductivity is 1000 µS/cm, calculate the conversion factor k.
- Use the formula: k = TDS / Conductivity
- Substitute the given values: k = 500 / 1000
- Perform the calculation: k = 0.5
The conversion factor for this sample is 0.5.
Most Common FAQs
The ideal TDS range for drinking water is typically between 300 and 500 ppm. However, water with TDS below 300 ppm is consider excellent for drinking.
The conversion factor varies because the composition of dissolved solids (such as salts, minerals, and ions) in water affects the relationship between conductivity and TDS. Different types of water, such as seawater or freshwater, have unique k values.
This calculator is widely use in industries like agriculture to monitor irrigation water quality, in aquariums to ensure healthy aquatic environments, and in beverage production to maintain product standards.