30 FREE TOOLS · ❋
Garden & agriculture calculators
Plan planting, irrigation, yield and land-based resource quantities.
Plant spacing, soil & seed
Estimate planting positions, seed quantities and container or bed fill.
Explore topic ↗9 calculatorsIrrigation & applied water
Translate selected depths, measured flow and runtime into water quantities.
Explore topic ↗7 calculatorsHarvest, yield & nutrient quantities
Describe crop output and convert externally supplied nutrient requirements.
Explore topic ↗All garden & agriculture calculators
Plant Spacing Calculator
Estimate planting density from row and in-row spacing.
Plant Row Count Calculator
Count evenly spaced planting rows across a defined clear width.
Plants Per Row Calculator
Count plant positions along a usable row with selected spacing.
Triangular Plant Spacing Calculator
Estimate plant density in a staggered equilateral-triangle arrangement.
Seed Quantity Calculator
Calculate total seed mass from an entered area-based sowing rate.
Grass Seed Bag Calculator
Convert a grass seed coverage specification into whole bag quantities.
Seed Germination Adjustment Calculator
Adjust seed count for a chosen expected germination percentage.
Seed Survival Adjustment Calculator
Plan seed count when both germination and later survival losses are entered.
Raised Bed Soil Calculator
Estimate fill volume for a rectangular raised garden bed.
Round Planter Soil Calculator
Estimate soil volume for a straight-sided round planter.
Tapered Planter Soil Calculator
Estimate soil fill volume for a tapered round plant pot.
Potting Mix Blend Calculator
Allocate one ingredient of a volume-based potting mix recipe.
Compost Spread Volume Calculator
Estimate compost volume for an even layer over a measured area.
Growing Medium Bag Calculator
Convert a potting-medium volume requirement into whole bags.
Irrigation Volume Calculator
Translate a selected irrigation depth into water volume.
Irrigation Runtime Calculator
Find watering duration from a water-volume target and flow rate.
Sprinkler Precipitation Rate Calculator
Convert sprinkler flow and coverage area into an average application rate.
Drip Irrigation Total Flow Calculator
Estimate total nominal flow of equal drip emitters.
Drip Water Per Plant Calculator
Find water delivered per plant during a drip-irrigation interval.
Irrigation Gross Depth Calculator
Account for an assumed application efficiency in a water-depth budget.
Rainfall Irrigation Offset Calculator
Subtract entered effective rainfall from a chosen irrigation-depth target.
Rain Gauge Catch Depth Calculator
Convert collected water volume and opening area into rainfall depth.
Irrigation Energy Cost Calculator
Estimate electricity spending for an irrigation pump run.
Crop Yield Per Area Calculator
Express measured harvest quantity per unit area.
Crop Revenue Calculator
Estimate gross harvest revenue from saleable weight and an entered price.
Harvest Loss Percentage Calculator
Compare saleable harvest with an entered pre-loss quantity.
Fertilizer Product Quantity Calculator
Convert a supplied nutrient requirement into product mass using the labelled nutrient percentage.
Fertilizer Nutrient Content Calculator
Find mass of one labelled nutrient component in a fertilizer amount.
Seeding Rate Per Hectare Calculator
Calculate an actual mass-based sowing rate from seed use and land area.
Thousand Seed Weight Count Calculator
Estimate seed count from sample mass and an entered thousand-seed weight.
Make your inputs count
Plant spacing, sowing rates, water targets and nutrient requirements are inputs you select or obtain from suitable local guidance. The calculators translate those quantities; they do not prescribe crop management or infer soil conditions.