Free Gardening Calculators

Free Gardening Calculators to solve your trickiest garden problems in seconds —no math required! Get science-backed tools for compost, planting, watering, and more. Perfect for organic growers and beginners alike.

Benefits

Fertilizer Calculators

Turn kitchen waste into plant food with precision:

Coffee Grounds pH Tool

Coffee Grounds pH Tool Calculator

Free coffee grounds pH calculator

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Banana Peel Potassium Calculator

Banana Peel Potassium Calculator

Convert peels to potassium-rich fertilizer

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Eggshell Calcium Calculator

Eggshell Calcium Calculator

Prevent blossom end rot naturally

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Benefits

Compost & Soil Calculators

Optimize your compost bins and nutrient output:

Compost Volume Calculator

Compost Reduction Calculator

Estimate Your Compost Shrinkage

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Compost Bin Size Calculation

Compost Bin Size Calculator

Convert peels to potassium-rich fertilizer

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Eggshell Calcium Calculator

Coming Soon

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