EC Concentrate
Convert between PPM and EC on different meter scales.
About EC Concentrate
TDS meters report PPM using different multipliers, so dividing by your meter's scale gives the true EC. Two meters can read 700 and 1000 on the same solution, so standardizing on EC makes advice and doses comparable.
Formula
EC Concentrate
EC = ppm / scale factor
- scale
- Conversion factor built into your TDS meter
Worked example
With the default values below, EC Concentrate returns EC of 1.00. Change any input above and every figure here is recalculated in your browser.
Inputs used
- PPM readingminimum 0
- 700
- Meter scaleone of 500 scale (Eutech), 640 scale (Hanna), 700 scale (TDS-3)
- 700 scale (TDS-3)
Results
- EC
- 1.00 mS/cm
- PPM on 500 scale
- 500
- PPM on 700 scale
- 700
Step by step
- 1Values used
- 2EC Concentrate
- 3EC= 1.00 mS/cm
- 4PPM on 500 scale= 500
- 5PPM on 700 scale= 700
Assumptions and limits
- The result is derived only from the 2 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
- Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
How is EC Concentrate calculated?
EC = ppm / scale factor TDS meters report PPM using different multipliers, so dividing by your meter's scale gives the true EC.
Why does EC Concentrate matter?
Two meters can read 700 and 1000 on the same solution, so standardizing on EC makes advice and doses comparable.
What values do I need to enter?
This calculator takes 2 inputs: PPM reading, Meter scale. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.