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Free Garden Calculators & Tools

Fast, practical calculations for gardeners, landscapers, growers, and commercial applications.

Remembering entries keeps them on this device. A fertilizer plan is saved to your NutriHarvest account only when you select Save plan.

Fertilizer Application & Quantity Calculator

Calculate fertilizer amounts for gardens, landscapes, acreage, and commercial applications. Scale a rate you already have; the calculator does not invent an application rate.

Examples: 4 lb per 100 sq ft for a garden, or 300 lb per 1 acre for an acreage application. The calculator converts the area units automatically.

About these calculations

Results are mathematical estimates based on the information you enter. Always follow the fertilizer label and your soil-test or local Extension recommendations when available. Soil conditions, nutrient availability, weather, and plant needs vary. Matching nutrient quantities does not mean two fertilizers will perform identically.

Explore NutriHarvest organic fertilizers

How did this tool work for you? Tell us what worked, what could be better, or what else would be useful to you.

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