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Gardening Calculators
Explore eight free calculators for compost ratios, watering volume, garden yield, raised bed soil, seed starting dates, and plant spacing.
Showing 18 calculators
Circular Garden Plant Count CalculatorCalculate circular garden plant count from garden diameter (ft), and area required per plant (ft²) with a transparent formula, worked example, and practical c.
Compost Carbon-Nitrogen Ratio CalculatorBlend two compost ingredients and calculate the combined carbon-to-nitrogen ratio against the ideal 30:1 target for fast, odor-free composting.
Compost Top Dressing Volume CalculatorCalculate compost top dressing volume from garden area (ft²), and top-dressing depth (in) with a transparent formula, worked example, and practical checks.
Drip Irrigation Emitter Count CalculatorCalculate drip irrigation emitter count from irrigated row length (ft), and emitter spacing (in) with a transparent formula, worked example, and practical che.
Drip Irrigation Runtime CalculatorCalculate drip irrigation runtime from water required (gal), emitter count, and emitter flow (gal/hour) with a transparent formula, worked example, and practi.
Garden Row Seed Count CalculatorCalculate garden row seed count from total row length (ft), and seed spacing (in) with a transparent formula, worked example, and practical checks.
Garden Watering Volume CalculatorCalculate exactly how many gallons of water your garden bed needs for a target watering depth, from bed size in feet.
Garden Yield Per Square Foot CalculatorEstimate your total vegetable harvest from crop yield per plant, planting density and bed square footage.
Greenhouse Air Exchange CFM CalculatorCalculate greenhouse air exchange cfm from greenhouse volume (ft³), and target air changes per hour with a transparent formula, worked example, and practical.
Plant Transplant Survival Rate CalculatorCalculate plant transplant survival rate from plants surviving, and plants transplanted with a transparent formula, worked example, and practical checks.
Potting Mix Component Volume CalculatorCalculate potting mix component volume from total potting mix volume, and component percentage with a transparent formula, worked example, and practical check.
Raised Bed Soil Volume CalculatorCalculate exactly how much soil you need to fill a raised garden bed, in cubic feet, cubic yards and bulk bags.
Seed Starting Date CalculatorCalculate exactly when to start seeds indoors based on your last spring frost date and the weeks-before-transplant number on your seed packet.
Seed Tray Germination Percentage CalculatorCalculate seed tray germination percentage from seeds germinated, and seeds tested with a transparent formula, worked example, and practical checks.
Shade Cloth Light Transmission CalculatorCalculate shade cloth light transmission from incoming light level, and shade cloth percentage with a transparent formula, worked example, and practical check.
Square Foot Gardening Plant Count CalculatorCalculate how many plants to grow per square foot using the classic Square Foot Gardening chart values.
Triangular Plant Spacing CalculatorCalculate how many plants fit a bed using triangular (offset row) spacing, and compare it to a standard square grid layout.
Vegetable Garden Plant Spacing CalculatorFind how many vegetable plants fit your garden bed based on standard per-crop spacing requirements.
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