Hydroponics Online

Free NPK nutrient solution calculation for hydroponics. Precise fertilizer proportions for tomatoes, cucumbers, strawberries, lettuce and other crops.

Fast Calculation

in 30 seconds

Precision

up to 0.01 g/L

Cloud Storage

your profiles

10+ profiles

ready recipes

NPK Calculator

Macro and micronutrient calculation: nitrogen, phosphorus, potassium, calcium, magnesium, iron. Automatic salt and concentration selection.

  • EC and PPM Calculation
  • N:P:K Ratios
  • pH Adjustment
Calculate Solution

Profile Database

Ready-made solution recipes for popular crops. Proven schemes from the hydroponics community.

  • Tomatoes, cucumbers, peppers
  • Strawberries, lettuce, greens
  • Flowers and ornamentals
Open Database

IoT Automation

GrowBox - EC, pH, temperature monitoring. Mixer - automatic solution preparation by recipe.

  • Reading History
  • Telegram Notifications
  • Calculator Integration
Details

EC Calculator

EC Meter Calibration

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VPD Calculator

Vapor Pressure Deficit

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Blocking

Element Compatibility

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Fertilizer

Complex Calculation

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Tutorial Videos

Video series on hydroponics and calculator usage. From basics to advanced techniques.

Auto-Watering Shop

Auto-watering trays without electricity. Up to 4 weeks of autonomous operation. Fits any bottles.

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Community

Join the hydroponics Telegram chat. Experience sharing, help for beginners, recipe discussions.

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About ponics.online Hydroponics Calculator

Ponics.online is an online service for calculating nutrient solutions in hydroponics as well as automation. Our NPK calculator helps precisely calculate macro and micronutrient proportions: nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg), sulfur (S), as well as iron (Fe), manganese (Mn), boron (B), zinc (Zn), copper (Cu), and molybdenum (Mo).

The service is suitable for both beginner hydroponics enthusiasts and professionals. Ready-made nutrient profiles for tomatoes, cucumbers, peppers, strawberries, lettuce and other crops will help you start growing quickly. Integration with IoT devices allows automating EC, pH monitoring and solution preparation.