Calculators · Free

Hydroponic EC calibration worksheet

Interpolate a grower’s measured dry-recipe concentration and scale a new batch.

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How it works

Interpolate a grower’s measured dry-recipe concentration and scale a new batch.

f = (ECₜ−EC₁)/(EC₂−EC₁); c = c₁+f(c₂−c₁); m = cV; 0 ≤ f ≤ 1

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University of Minnesota Extension ↗

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About this tool

Interpolate a grower’s measured dry-recipe concentration and scale a new batch.

Measure EC at two known g/L concentrations of the same dry recipe, water and temperature. Interpolate only between those points, then multiply by final litres. The relation is locally approximate. Presets illustrate arithmetic and are not fertilizer recommendations.

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How to use it

Enter your values
Lower recipe concentration · Higher recipe concentration · EC measured at lower concentration · EC measured at higher concentration · Target EC within measured range · Final solution volume
Calculate / generate
Interpolate a grower’s measured dry-recipe concentration and scale a new batch.
Result
Recipe mass: 75 g Interpolation estimate: mix, measure EC and adjust; no nutrient-balance guarantee.

Calculation method

f = (ECₜ−EC₁)/(EC₂−EC₁); c = c₁+f(c₂−c₁); m = cV; 0 ≤ f ≤ 1

Example scenario