Garden Calculators
Gardening, lawn care, irrigation and composting
109 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.
Seed Starting Calculator — When to Start Seeds Indoors 2026
Find exactly when to start seeds indoors by USDA zone. Get a personalized planting schedule with indoor start dates, transplant timing, and harvest windows.
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.
Garden Bed Planner — Plant Spacing & Layout Calculator
Plan your raised bed garden layout with our free planner. Calculate how many plants fit, get companion planting tips, and optimize spacing for maximum yield.
Rainwater Harvesting Calculator — Collection, Savings & Tank Size
Estimate annual rainwater collection from your roof area, calculate water bill savings, and find the ideal tank size based on your usage and local rainfall.
Beekeeping Calculator
Estimate beekeeping startup costs, annual expenses, honey yield, and revenue. Get a detailed 5-year projection with breakeven analysis for your apiary.
Livestock Hay Calculator
Calculate hay needs for cattle, horses, goats, and sheep. Get total tons required, bale count, cost estimate, and storage space based on herd size and season.
Bonsai Proportions Calculator
Calculate ideal bonsai tree proportions including height, branch placement, crown spread, and pot dimensions based on trunk diameter and traditional style.
Backyard Ice Rink Calculator
Calculate water volume, liner size, fill time, freeze time, and materials for a backyard ice rink. Enter dimensions and temperature for accurate estimates.
Hot Tub Chemical Calculator
Calculate exact chemical doses for your hot tub. Get pH, alkalinity, chlorine, and bromine adjustments based on your water test readings and tub volume.
Sandbox Sand Calculator — How Much Sand You Need
Calculate how much sand you need for your sandbox. Get exact bag counts, weight, volume, and cost estimates for rectangular, circular, or hexagonal sandboxes.
Soil Amendment Calculator — Lime & Sulfur Application Rates
Calculate how much lime or sulfur to add to your soil. Enter current pH, target pH, soil type, and area for precise amendment rates and application schedules.
Companion Planting Calculator — Find Best Plant Pairings
Find the best companion planting pairs for your garden. Check compatibility for 20+ vegetables, herbs, and flowers with spacing tips and clear reasons.
Garden Container Size Calculator — Right Pot for Every Plant
Find the right container size for tomatoes, peppers, herbs, and vegetables. Calculate total potting soil in gallons and bags for your container garden.
Garden Path Calculator — Materials, Cost & Coverage Estimator
Calculate materials and costs for garden paths and walkways. Covers gravel, pavers, flagstone, mulch, stepping stones, and decomposed granite options.
Lawn Mowing Calculator — Time, Cost & Mower Comparison
Calculate lawn mowing time and annual costs by mower type. Compare push, riding, zero-turn, and robot mowers with professional lawn service estimates.
Tree Removal Cost Calculator — Estimate Removal & Stump Grinding
Estimate tree removal costs by height, trunk diameter, location, and condition. Includes stump grinding prices, project time estimates, and permit notes.
Mushroom Substrate Calculator — Spawn & Yield Estimator
Calculate substrate weight, spawn amount, and expected yield for oyster, shiitake, and lion's mane mushrooms. Plan your grow from inoculation to harvest.
Firewood Seasoning Calculator — Drying Time by Species & Climate
Calculate firewood seasoning time by wood species, split size, stacking method, and climate. Get ready-to-burn dates, moisture estimates, and BTU ratings.
Drip Irrigation Planner Calculator
Plan your drip irrigation system with emitter counts, line lengths, pressure checks, and a full parts list. Get a complete design with cost estimates.
Vermicompost Calculator
Calculate worm composting output, processing capacity, and annual savings. Match worm quantity to food waste with temperature and seasonal adjustments.
Topsoil Calculator — Cubic Yards, Bags & Cost
Calculate cubic yards of topsoil needed for lawn prep, garden beds, and leveling. Get bag counts, weight in tons, and cost estimates for bulk vs bagged soil.
Garden Fence Calculator — Materials, Posts & Cost
Calculate fence materials for your garden perimeter. Get post counts, rail quantities, panel needs, gate hardware, and material cost estimates by fence type.
Sprinkler Coverage Calculator — Heads, Zones & GPM
Plan sprinkler head placement for full lawn coverage. Calculate heads needed, GPM flow rate, zone count, and weekly water usage by sprinkler type and area.
Shade Garden Calculator — Plants, Spacing & Layout
Analyze shade conditions and get plant recommendations for your garden. Match perennials, shrubs, and ground covers to sun hours, soil type, and moisture.
Garden Water Usage Calculator — Weekly Gallons & Cost
Estimate weekly and monthly garden water needs by plant zone, climate, and season. Get gallons per area and cost projections for lawn and garden watering.
Tree Spacing Calculator — Optimal Distance Between Trees
Calculate optimal spacing between fruit and shade trees. Get tree count per area, canopy coverage percentage, row layout, and pollination partner tips.
Leaf Removal Calculator — Estimate Cleanup Time & Cost
Estimate fall leaf cleanup effort, bag count, hours, and total cost for your yard. Compare raking vs blowing vs mulch mowing with DIY and service costs.
Garden Shed Size Calculator — How Big a Shed Do You Need
Size your garden shed based on equipment and storage needs. Get standard shed size recommendations, estimated costs, and organization tips for your yard.
Lawn Aeration Calculator — Plan Core Aeration for Your Lawn
Plan core aeration for your lawn with core count, passes, timing, and cost estimates. Compare DIY machine rental vs professional service by soil type.
Vegetable Yield Calculator — Harvest Estimate & Value
Estimate your expected vegetable harvest and grocery savings by plant type, spacing, and garden size. See yield per plant and total value of homegrown produce.
Rain Garden Calculator
Calculate rain garden size, plant counts, and excavation volume from your drainage area. Get soil-specific ponding depth, cost estimates, and runoff capacity.
Garden Irrigation Timer Calculator
Calculate sprinkler run times per zone based on plant type, soil, and weather season. Includes cycle/soak scheduling and monthly water cost estimates.
Soil Test Interpreter Calculator
Interpret your soil test results and get specific amendment recommendations. Enter N, P, K, pH, and organic matter levels to see what your garden needs.
Erosion Control Calculator
Calculate erosion control materials for slopes: blankets, straw mulch, hydroseed, silt fence, or wattles. Get quantities, costs, and method selection.
Bulb Planting Depth Calculator
Find the right planting depth and spacing for 12 flower bulb types. Get bulb counts, cost estimates, bone meal amounts, and a seasonal bloom calendar.
Cover Crop Calculator
Calculate cover crop seed amounts and costs for your garden beds. Compare 10 popular crops by nitrogen fixation, winter behavior, and optimal seeding rate.
Pollinator Garden Calculator
Plan a pollinator-friendly garden with plant counts by bloom season. Calculate costs, coverage, and species diversity to attract bees and butterflies.
Fruit Tree Yield Calculator
Estimate annual fruit yield by tree type and age. Compare 10 fruit trees with harvest value, pollination needs, and estimated years to first fruit harvest.
Herb Garden Planner Calculator
Plan your herb garden with spacing, yield, and cost estimates for 12 popular culinary herbs. Get companion planting tips and harvest value projections.
Square Foot Garden Calculator
Plan a square foot garden with plant-per-square spacing for 20+ vegetables. Calculate soil volume, bed layout, harvest value estimates, and total costs.
Shade Sail Calculator — Coverage, Post Height & Hardware
Calculate shade sail coverage area, ground shade projection, recommended post heights, and hardware needs. Factors in sun angle, sail shape, and sag allowance.
Compost Tea Calculator — Recipe, Brew Time & Coverage
Calculate compost tea ingredients, brewing time, and coverage area. Get exact compost, molasses, and water amounts for any batch size and garden area.
Microgreen Yield Calculator
Estimate microgreen yield per tray by variety. Calculate seed density, harvest weight, grow time, seed cost, and monthly revenue for 10 popular varieties.
Bat House Calculator
Calculate bat house dimensions and mounting height for natural mosquito pest control. Get chamber sizing, placement, and capacity estimates for your yard.
Landscape Fabric Calculator — Rolls, Pins & Cost
Calculate landscape fabric for garden beds. Get roll counts, pin quantities, seam overlap, and cost estimates for rectangle, circle, and L-shaped bed layouts.
Lawn Overseeding Calculator — Seed Rate & Coverage
Calculate grass seed for overseeding or new lawns. Get seed rates by grass type and condition, bag quantities, fertilizer needs, and total cost estimates.
Garden Fountain Pump Calculator — GPH & Wattage
Calculate the right pump size for fountains, waterfalls, and ponds. Get GPH ratings, wattage estimates, tubing recommendations, and monthly electricity costs.
Firewood BTU Calculator — Heat Output by Species
Compare firewood BTU output by wood species and moisture content. Calculate heating equivalents for oil, gas, propane, and electricity with cost comparisons.
Patio Paver Sand Calculator — Base, Bedding & Joints
Calculate sand and gravel amounts for paver patios. Get gravel base tonnage, bedding sand bags, polymeric joint sand, edging materials, and cost estimates.
Garden Lighting Calculator — Transformer & Wire Sizing
Size your landscape lighting transformer, wire gauge, and fixture layout. Get voltage drop analysis, monthly electricity costs, and material cost estimates.
Composting Time Calculator
Estimate how long composting takes based on your method, C:N ratio, pile size, and climate zone. Get timelines for hot, cold, tumbler, and vermicomposting.
Soil pH Calculator
Calculate lime or sulfur needed to adjust soil pH for your garden. Enter current and target pH, soil type, and area to get precise amendment recommendations.
Mulch Depth Calculator
Find the right mulch depth for your garden beds by mulch type. Calculate cubic yards, bags needed, and cost estimates for bark, wood chips, straw, and more.
Garden Yield Calculator
Estimate your garden's total harvest and grocery store value per square foot. Select vegetables, allocate growing area, and see detailed yield breakdowns.
Chicken Run Calculator — Run Area, Fencing & Posts
Calculate outdoor chicken run area per bird, fencing material, and post count. Plan the right run size for your flock with wire rolls and gate estimates.
Goat Pen Calculator — Pen Size, Shelter & Fencing
Calculate goat pen size per head, shelter area, and fencing materials. Plan the right pen dimensions for standard, miniature, dairy, or meat goat breeds.
Beehive Frame Calculator — Frames, Boxes & Foundation
Calculate total beehive frames needed per hive, foundation sheets, and box count. Plan your apiary setup for Langstroth deep, medium, shallow, or top bar hives.
Honey Extraction Calculator — Yield per Frame by Region
Estimate honey yield per frame by season and region. Calculate expected pounds, jar count, and value from deep, medium, or shallow frames with capping rate.
Duck House Calculator — Shelter & Run Size per Duck
Calculate duck shelter size and outdoor run area per bird. Get fencing material, water area, and post count estimates for your backyard duck housing setup.
Rabbit Colony Calculator — Housing Area & Nesting Boxes
Calculate colony housing area and nesting box count for your rabbits. Plan space per rabbit with exercise area, perimeter fencing, and minimum requirements.
Livestock Fencing Calculator — Posts, Wire & Gates
Calculate pasture fencing materials including posts, wire rolls, and gates by perimeter. Plan woven wire, high tensile, board, or electric fence for livestock.
Cold Frame Calculator — Dimensions, Glazing & Lumber
Calculate cold frame dimensions, glazing material, and lumber needs. Plan glass, polycarbonate, or polyethylene cold frames for season extension gardening.
Hoop House Calculator — Pipe, Plastic & Dimensions
Calculate hoop house materials including pipe count, plastic covering, and ground stakes. Plan your hoop greenhouse by length, width, and hoop spacing distance.
Greenhouse Heating Calculator — BTU by Volume & Zone
Calculate BTU needed to heat your greenhouse by volume, glazing type, and USDA zone. Get propane, natural gas, and electric fuel estimates for heating.
Deer Fence Calculator — 8ft Posts, Mesh & Gates
Calculate 8-foot deer-proof fence materials including posts, mesh rolls, gates, and tension wire. Plan poly mesh or welded wire deer fencing by perimeter.
Grape Vine Trellis Calculator — Wire, Posts & Vines
Calculate grape trellis wire, posts, and vine count by row length and training system. Plan VSP, high wire, or Geneva double curtain trellises for vineyards.
Fish Pond Calculator — Volume, Stocking Rate & Pump
Calculate fish pond volume in gallons, maximum stocking rate by species, pump size, and liner dimensions. Plan koi, goldfish, tilapia, or catfish ponds.
Food Forest Calculator — Plants, Layers & Spacing
Design a multi-layer food forest garden. Calculate plant counts for canopy, understory, shrub, herbaceous, ground cover, vine, and root layers by plot size.
Hügelkultur Calculator — Logs, Compost & Soil by Mound Size
Plan a hügelkultur raised mound bed with the right material volumes. Calculate logs, compost, and topsoil quantities by mound length, width, and height.
Biochar Calculator — Feedstock, Kiln Size & Yield
Calculate biochar production from wood feedstock. Estimate yield by feedstock type, kiln capacity, burn batches, and garden application coverage area.
No-Till Garden Calculator — Sheet Mulch Layers & Materials
Plan a no-till sheet mulch garden bed. Calculate cardboard, compost, and mulch quantities needed by bed dimensions and layer depth for no-dig gardening.
Garden Row Cover Calculator — Fabric Area & Hoop Wire
Calculate row cover fabric and hoop wire for garden beds. Get fabric area, hoop count, wire length, and material list by bed dimensions and cover type.
Fruit Tree Spacing Calculator — Trees Per Acre by Rootstock
Plan your orchard layout with the right fruit tree spacing. Calculate trees per acre, rows, and spacing distance by rootstock type and planting pattern.
Berry Patch Calculator — Bush Spacing & Yield by Variety
Plan your berry patch with proper bush spacing and yield estimates. Calculate total plants needed, rows, and annual harvest pounds by variety and area.
Herb Spiral Calculator — Stone, Soil & Plants by Diameter
Design a permaculture herb spiral garden. Calculate stone count, soil volume, and plant slots by spiral diameter and height for a self-watering herb bed.
Keyhole Garden Calculator — Blocks, Soil & Compost Basket
Plan a keyhole garden bed with the right materials. Calculate blocks, soil volume, compost basket size, and planting area by garden diameter and wall height.
Straw Bale Garden Calculator — Bales & Conditioning Schedule
Plan a straw bale garden with the right number of bales and conditioning supplies. Calculate bales needed, nitrogen, water, and a 10-day prep schedule.
Pond Pump Calculator — GPH by Volume & Head Height
Size a pond pump by gallons per hour. Calculate required GPH based on pond volume, head height, pipe run, and get energy cost estimates for 24/7 operation.
Garden Cloche Calculator — Dimensions & Cost per Plant
Calculate garden cloche needs for frost and pest protection. Get cloche count, total cost, and coverage area by plant count, spacing, and cloche type.
Campfire Wood Calculator
Estimate how much firewood you need for camping. Enter fire size, burn duration, wood type, and number of nights to get logs, bundles, and total weight.
Compost Tea Brewer Calculator — Ratios, Brew Time & Application
Calculate compost tea brewing ratios, additive amounts, brew time, and garden coverage. Covers worm castings, fungal, and bacterial compost tea recipes.
Hay Storage Calculator — Bales, Barn Sizing & Feed Duration
Calculate hay bale storage needs for your livestock. Estimate total bales, barn dimensions, feed duration, and stacking layout by animal type and herd size.
Seed Saving Calculator — Viability, Isolation & Storage
Plan seed saving with isolation distances, viability estimates, and storage tips. Calculate seeds needed by crop family, germination rate, and storage years.
Milk Yield Calculator — Daily Production by Breed & Stage
Estimate daily, weekly, and annual milk production by breed, lactation stage, and feed quality. Includes butterfat content plus cheese and butter yield data.
Egg Hatch Rate Calculator — Incubation Success Predictor
Predict egg hatch rates for chickens, ducks, quail, and turkeys. Calculate expected chicks from temperature, humidity, incubator type, and egg fertility rate.
Livestock Weight Calculator — Estimate by Heart Girth & Length
Estimate livestock weight from heart girth and body length measurements. Calculate live weight and dressed weight for cattle, pigs, goats, sheep, and horses.
Pasture Rotation Calculator — Paddocks, Rest Days & Stocking Rate
Plan rotational grazing with paddock sizing, rest periods, and stocking rates. Calculate grazing days, rotation cycles, and moves per season by animal units.
Chicken Feed Mix Calculator — Custom Protein Blend
Formulate custom chicken feed with the right protein percentage for your flock. Calculate ingredient ratios, cost per pound, and monthly feed consumption.
Pig Feed Calculator — Daily Feed, FCR & Days to Market
Calculate pig feed requirements by weight and growth stage. Estimate daily feed, total feed to market weight, feed conversion ratio, and total feed cost.
Gestation Calculator — Livestock Due Date by Species
Calculate livestock due dates for cattle, goats, sheep, pigs, horses, and rabbits. Track gestation progress, trimester stage, and earliest-to-latest windows.
Orchard Yield Calculator — Fruit Tree Production Estimates
Estimate annual fruit production by tree type, age, and orchard health. Calculate yield per tree, total bushels, revenue potential, and 10-year projections.
Crop Rotation Calculator — Garden Bed Planner by Family
Plan crop rotation by plant family groups with visual bed schedules. Prevent soil depletion and disease with automated rotation planning for your garden beds.
Mushroom Log Calculator — Plug Count, Spawn & Yield
Calculate mushroom log inoculation needs including plug count, spawn bags, wax, and harvest timeline. Estimate annual and lifetime yield for shiitake and more.
Maple Tapping Calculator — Tree Count, Taps & Syrup Yield
Calculate maple syrup yield from your trees: taps per tree by diameter, sap collection by species, equipment costs, and syrup value for the sugaring season.