Garden Calculators
Gardening, lawn care, irrigation and composting
16 calculators in this category
Pool Volume Calculator
Calculate your pool volume in gallons for any shape — rectangular, round, or oval. Get chemical dosing estimates, fill time, and water cost breakdowns.
Compost Calculator
Calculate the ideal carbon to nitrogen (C:N) ratio for your compost pile. Add materials and get recommendations for balanced, fast-decomposing compost.
Seed Spacing Calculator
Plan your garden layout with correct plant and row spacing. Enter bed dimensions and crop type to get exact plant counts, row counts, and seed quantities.
Pond Liner Calculator
Calculate the exact size of pond liner and underlayment needed for your water garden or koi pond. Enter dimensions to get liner size with proper overlap.
Raised Bed Soil Calculator
Calculate how much soil your raised bed needs in cubic feet and cubic yards. Get mix ratios for topsoil, compost, and amendments by bed size and depth.
Aquaponics Ratio Calculator
Size your aquaponics system by fish tank volume, species, and grow bed type. Get stocking density, daily feed rates, and accurate plant capacity estimates.
Hydroponics Nutrient Calculator
Calculate hydroponic nutrient solution strength by growth stage and reservoir size. Get precise target EC/PPM, Part A/B dosing, and pH Down estimates.
Lawn Overseed Calculator
Calculate how much grass seed you need for a new lawn or overseeding project. Enter lawn area and grass type for seed weight, bags, and fertilizer amounts.
Greenhouse Calculator — Size & Heating
Plan your greenhouse by type, size, and glazing material. Get floor area, growing space, BTU heating requirements, and total plant capacity for any design.
Rain Barrel Calculator — Rainwater Sizing
Estimate monthly rainwater collection from your roof by area, material, and local rainfall. Get barrel count, garden watering duration, and annual savings.
Irrigation Calculator — Water & Scheduling
Calculate weekly water needs for lawns, vegetables, shrubs, and trees by soil type, sun exposure, and climate. Get gallons, runtime, and drip emitter counts.
Worm Bin Calculator — Size & Setup
Size your worm bin by household waste output and worm species. Get worm count, bin dimensions, bedding weight, monthly compost output, and startup costs.
Trellis Calculator
Calculate trellis materials by type, size, and grid spacing. Get linear feet of lumber, post count, fastener quantity, and total project cost estimates.
Lawn Fertilizer Calculator — How Much
Calculate how much fertilizer your lawn needs by area, N-P-K ratio, and target nitrogen rate. Get total pounds, bags needed, and nutrient delivery breakdown.
Frost Date Calculator - Planting Schedule by Zone
Look up frost dates by USDA zone and get a planting schedule for vegetables and herbs. See last spring frost, first fall frost, and growing season length.
Grow Light Calculator
Calculate grow light wattage, number of fixtures, and monthly electricity costs for your indoor garden. Covers LED, HPS, fluorescent, and CMH light types.