Calculadora de Adubo
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
kg = (área × dose_por_100m²) / 100
About this calculator
The Fertilizer Calculator helps determine the exact amount of fertilizer needed for a specific area, based on the recommended dose per 100 square meters. Simply enter the total area in square meters and the dose indicated for each 100 m², and the tool calculates the total weight of fertilizer in kilograms. The formula used is simple: kg = (area × dose_per_100m²) / 100.
This calculator is useful for gardeners, farmers, and anyone who needs to apply fertilizer accurately to flower beds, vegetable gardens, lawns, or crops. It avoids product waste and ensures plants receive proper nutrition. For example, if the recommendation is 5 kg of fertilizer per 100 m² and your area is 250 m², the result will be 12.5 kg.
When using the calculator, it is important to check the recommended dose on the fertilizer package, as each type (organic, chemical, NPK, etc.) may have different concentrations. Also consider soil type and specific plant needs. The tool provides an estimated value; adjustments may be necessary based on soil analysis or agronomist guidance.
Frequently asked questions
How do I use the fertilizer calculator?
Enter the total area in square meters and the recommended dose per 100 m². Click calculate and the result will be the total weight in kg.
What if I don't know the dose per 100 m²?
Check the fertilizer package, which usually has the recommendation. If not, seek guidance from an agronomist or use a standard dose for the plant type.
Does the calculator work for any type of fertilizer?
Yes, as long as you enter the correct dose per 100 m². The calculation is universal, but remember that organic and chemical fertilizers have different concentrations.
Do I need to consider application depth?
No, the calculator considers only the surface area. For crops requiring deep incorporation, consult a specialist.
Can I use the calculator for lawns?
Yes, it is ideal for lawns. Just measure the lawn area and use the recommended dose for grass, usually indicated on the fertilizer package.