Gardening

Grass Seed Calculator

Calculate grass seed needed by lawn area, grass type, and seeding method. Covers 8 species including bluegrass, fescue, ryegrass, bermuda, and zoysia.

Retaining Wall Calculator

Calculate retaining wall blocks, base gravel, and capstones for any landscape wall. Enter wall dimensions and block size to find total materials needed.

Sod Coverage Calculator

Calculate sod rolls or pallets for a new lawn. Enter lawn area in square feet or meters to get rolls, pallets, and total installed cost.

Lawn Care Service vs DIY Break-Even Calculator

Compare annual cost of hiring a lawn service vs DIY mowing and fertilizing. Inputs lot size, service price, and DIY equipment costs.

Greenhouse CO2 Enrichment Calculator

Calculate CO2 needed to enrich greenhouse air to a target ppm. Includes hourly maintenance dose for any vent rate or air change frequency.

Sprinkler Zone Run Time Calculator

Find sprinkler run time per zone from coverage area, sprinkler GPM, and weekly water need. Works for rotors, sprays, and drip lines.

Grass Seed Calculator

Calculate how much grass seed you need for a new lawn or overseeding an existing one. Covers all major grass types with correct seeding rates.

Pollinator Garden Planner

Calculate plants needed for bees or butterflies from garden area in sq ft or m². Returns count by bloom season, spacing guide, and native species by region.

Crop Rotation Planner

Plan your vegetable garden crop rotation. Calculate how many years to wait before replanting the same crop family to prevent soil depletion and disease.

Beekeeping Honey Yield Estimator

Estimate your expected honey harvest from one or more hives. Enter hive count, honey frames, and capping percentage to calculate your yield.

Hydroponics Nutrient Solution Calculator

Calculate how much nutrient concentrate to add to reach your target EC. Includes ppm conversion and EC guidance for different plant stages.

Compost Readiness Time Estimator

Estimate how long your compost pile will take to be ready. Based on composting method, carbon-to-nitrogen ratio, pile size, and turning frequency.

Garden Rain Water Need Calculator

Calculate how much rainfall your garden actually needs per week and whether recent rain was sufficient, based on bed area and plant type.

Grow Bag Soil Volume Calculator

Calculate how much potting mix is needed to fill grow bags by size and quantity. Returns volume in liters, cubic feet, and standard 1 and 2 cubic foot bags.

Trellis Spacing Calculator

Calculate post spacing, wire rows, and total materials for a garden trellis from bed length and plant type. Returns lumber, wire length, and anchor counts.

Vertical Garden Weight Load Calculator

Calculate the total weight of a vertical garden system including planters, soil, plants, and water — for wall and fence mounting decisions.

Bonsai Watering Schedule Calculator

Find bonsai watering frequency from species, material, size, season, and humidity. Returns daily or every-X-days schedule for juniper, ficus, maple, and pine.

Companion Planting Guide Calculator

Find the best companion plants for any vegetable or herb. Discover which plants help each other grow and which to keep apart.

Composting Carbon to Nitrogen Ratio Calculator

Calculate the C:N ratio for your compost pile from browns and greens by weight. Returns your ratio vs the ideal 25-30:1 and a mix adjustment guide.

Frost Cloth Coverage Calculator

Calculate frost cloth needed from bed dimensions and drape allowance. Returns total coverage area and number of standard rolls to protect beds from freezing.

Greywater Irrigation Calculator

Calculate how much greywater from sinks, showers, and laundry you can safely reuse for garden irrigation per day and per week.

Lawn Watering Schedule Calculator

Calculate how much water your lawn needs per week and create a watering schedule. Based on lawn size, grass type, and your local climate zone.

Rain Garden Size Calculator

Calculate the recommended size for a rain garden based on your drainage area, soil type, and rainfall. Helps manage stormwater runoff naturally.

Seed Germination Rate Calculator

Calculate expected seedling count and germination rate from any seed packet. Plan your planting for the seedlings you actually need.

Soil pH Adjustment Calculator

Calculate garden lime or sulfur needed to adjust soil pH. Enter current and target pH with soil type to get the application rate in pounds per 100 sq ft.

Tree Mulch Ring Calculator

Calculate how much mulch you need for a ring around a tree. Enter tree diameter, ring width, and mulch depth to get exact cubic yards or bags.

Tree Root Zone Calculator

Calculate the critical root zone (CRZ) of a tree based on trunk diameter. Determine safe distances for construction, excavation, and landscaping near trees.

Fertilizer NPK Calculator

Calculate actual nitrogen, phosphorus, and potassium in fertilizer bags. Enter NPK ratio, bag weight, and area to get application rates.

Lawn Overseeding Calculator

Calculate seed needed for lawn overseeding from area, grass type, and coverage density. Covers Kentucky bluegrass, fescue, ryegrass, and Bermuda seeding rates.

Aquaponics Fish-to-Plant Ratio Calculator

Calculate fish stocking density, plant bed size, and water volume for a balanced aquaponics system. Based on fish per gallon and media bed filtration.

Beehive Honey Yield Estimator

Estimate honey production from your beehives based on colony strength, location, and season. Plan harvesting and hive management.

Compost Bin Size Calculator

Calculate ideal compost bin volume from weekly yard and kitchen waste output. Returns cubic feet and liters needed for active hot composting or cold composting.

Compost Ratio Calculator

Balance your compost pile with the ideal brown-to-green ratio. Enter materials by volume and get the carbon-to-nitrogen ratio with moisture guidance.

Compost Tea Brewing Calculator

Calculate compost tea ratios, brewing time, and coverage area. Get the right mix of compost, water, and nutrients for your garden.

Frost Date Planting Calculator

Calculate seed starting and transplant dates from your last spring frost date and plant type. Covers tomatoes, peppers, herbs, and other vegetables and flowers.

Frost Protection Calculator

Find the right frost protection for your plants based on forecast temperature. Covers row covers, frost cloth, cold frames, mulching, and water barrier methods.

Garden Path Material Calculator

Calculate materials for a garden path: pavers, gravel base volume, sand bed depth, and edging length. Enter path dimensions for a complete shopping list.

Greenhouse Heating Calculator

Calculate greenhouse BTU and watt heating requirements from dimensions, insulation R-value, and target temperature for accurate cold-night heater sizing.

Greenhouse Sizing Calculator

Calculate greenhouse footprint from plant count, growing style, and spacing. Returns length, width, and square footage for hobby and commercial growers.

Hydroponics Nutrient Calculator

Calculate nutrient EC and PPM for hydroponic plants by growth stage. Covers seedling, vegetative, and flowering phases for lettuce, tomatoes, and herbs.

Irrigation Timer Calculator

Calculate sprinkler or drip irrigation run time from area and plant water needs in inches per week. Returns minutes per cycle and gallons used per zone.

Mulch Depth Calculator

Calculate mulch depth and cubic yards from garden area and plant type. Returns volume for wood chips, bark, straw, and rubber mulch with seasonal guidance.

Plant Pot Soil Volume Calculator

Calculate potting soil volume for round, square, or rectangular pots. Enter dimensions to get liters and quarts needed with a bags-to-buy estimate.

Planting Date Calculator

Find indoor start and transplant dates from USDA zone and last frost date. Covers tomatoes, peppers, cucumbers, and 30+ crops with days-to-maturity guidance.

Rain Barrel Calculator

Calculate rainwater harvest from your roof per storm or per year. Enter roof area, rainfall amount, and barrel size to plan your collection system.

Rain Barrel Size Calculator

Calculate ideal rain barrel size from roof catchment area and monthly rainfall. Returns gallons per inch of rain and payback period vs municipal water cost.

Raised Bed Soil Calculator

Calculate the exact amount of soil needed for raised garden beds. Supports rectangular, L-shaped, and multiple bed configurations.

Raised Bed Wood Calculator

Calculate lumber needed to build a raised garden bed from dimensions and board thickness. Returns board count, screw quantity, post count, and material cost.

Soil Amendment Calculator

Calculate compost, peat moss, perlite, or other amendments for any garden bed. Enter dimensions and amendment ratio to get cubic feet or bags needed.

Tree Spacing Calculator

Calculate tree count and spacing for an orchard, windbreak, or privacy screen from plot dimensions. Returns row count and total trees.

Vermicompost Calculator

Calculate worm bin size, starting worm quantity, and weekly feeding schedule for vermicomposting based on household food scraps in pounds or kilograms.

Weed Control Coverage Calculator

Calculate weed killer or pre-emergent herbicide needed for your lawn or garden from area size and product concentration. Returns correct mix and total quantity.

Worm Bin Size Calculator

Calculate worm bin size and pounds of red wigglers from your weekly food waste. Returns bin dimensions and worm-to-waste ratio for healthy vermicompost.

Beekeeping Startup Calculator

Calculate beekeeping startup costs for hives, protective gear, tools, and nucleus colonies. Returns first-year and annual costs for Langstroth beginners.

Compost Bin Size Calculator

Calculate compost bin size from weekly food scraps and yard waste. Returns cubic feet needed for hot composting, cold composting, or vermicomposting.

Container Garden Calculator

Calculate how much potting soil you need and how many plants fit in your container. Enter pot diameter and depth for accurate results.

Garden Berm Calculator

Calculate fill soil needed to build a garden berm from length, width, and peak height. Returns cubic yards, truckloads, topsoil bags, and mulch coverage.

Garden Hose Flow Rate Calculator

Calculate garden hose flow rate in GPM from diameter, length, and water pressure. Compare 1/2, 5/8, and 3/4-inch hoses and estimate fill time for pools.

Garden Yield Calculator

Estimate harvest yield in lbs or kg from plant type and count. Covers tomatoes, peppers, zucchini, cucumbers, and 20+ vegetables with yield per plant.

Greenhouse Temperature Calculator

Estimate greenhouse temperature from outdoor temp, sun exposure, and glazing type. Returns expected temperature rise and minimum heating for year-round growing.

Harvest Date Calculator

Estimate harvest date from planting date, crop type, and days to maturity. Covers tomatoes, peppers, cucumbers, lettuce, and 20+ common vegetables.

Indoor Plant Light Calculator

Determine indoor light level from window direction and distance. Returns bright, medium, or low classification with plant recommendations and grow light specs.

Planter Box Soil Calculator

Calculate soil volume for planters and raised beds from dimensions. Returns bag count in 1 and 2 cu ft sizes with total weight for deck load planning.

Square Foot Garden Planner

Plan your square foot garden layout. Enter bed size and plant type to see how many plants fit, spacing, and planting layout.

Compost Calculator

Calculate compost bin volume, green-to-brown ratio, and estimated completion time from dimensions and ingredients. Returns moisture and turning frequency.

Drip Irrigation Calculator

Design your drip irrigation system. Enter number of plants, emitter flow rate, and water pressure to calculate system requirements and run time.

Fence Paint / Stain Calculator

Calculate how many gallons or liters of paint or stain you need for your fence. Enter fence dimensions and number of sides to coat.

Fertilizer Calculator

Calculate fertilizer amount for lawn or garden from area, NPK ratio, and target application rate. Returns lbs per 1,000 sq ft and total bags needed.

Frost Date Planner

Calculate transplant and seed-starting dates from your last spring frost date. Returns timing for tomatoes, peppers, squash, herbs, and cool-season crops.

Greenhouse Heating Calculator

Calculate the BTU or kW heater size needed for your greenhouse based on volume, target temperature, and outside temperature.

Grow Light Calculator

Calculate recommended grow light wattage, lumens, and hanging height for your growing area and plant type. Supports feet and meters.

Hedge Planting Spacing Calculator

Calculate hedge plants from length and species spacing for boxwood, privet, and arborvitae. Returns plant count, spacing in feet, and estimated planting cost.

Irrigation / Watering Schedule Calculator

Calculate your lawn watering schedule based on area, water needs, and sprinkler output. Get optimal run times in minutes per zone.

Lawn Mowing Time Calculator

Estimate lawn mowing time from area, mower deck width, and walking speed. Covers push, self-propelled, and riding mowers with overlap and turnaround time.

Lawn Seed Calculator

Calculate grass seed for new seeding or overseeding from lawn area and type. Covers fescue, bluegrass, ryegrass, bermuda, and zoysia at rates per 1,000 sq ft.

Mulch Calculator

Calculate cubic yards of mulch for any garden bed from area dimensions and desired depth. Supports 2, 3, and 4-inch coverage with bag count estimates.

Plant Spacing Grid Calculator

Calculate how many plants fit in a garden bed from dimensions and spacing per plant. Supports square grid and triangular offset patterns for maximum yield.

Plant Watering Calculator

Calculate watering frequency and amount from plant type, pot size, soil mix, and climate. Covers succulents, tropicals, vegetables, herbs, and garden beds.

Pond Volume Calculator

Calculate pond volume in gallons and liters for oval, rectangular, and irregular ponds. Includes pump size and fish stocking capacity estimate.

Pot Size Calculator

Find the recommended pot diameter and soil volume for your plant type and mature size. Supports inches/gallons and cm/liters.

Rain Garden Size Calculator

Calculate the ideal rain garden dimensions based on your roof drainage area and soil type for effective stormwater management.

Raised Bed Soil Calculator

Calculate soil mix volume to fill a raised garden bed from length, width, and depth. Returns cubic feet and yards with bag count for 1.5 and 2 cu ft bags.

Seed Spacing Calculator

Calculate how many plants fit in a garden bed from dimensions and plant spacing. Returns total plant count and seeds to buy for vegetables, flowers, and herbs.

Soil Calculator

Calculate how much soil or compost you need for raised beds and garden areas. Enter length, width, and depth in feet or meters.

Soil pH Adjustment Calculator

Calculate how much lime or sulfur to add to adjust your soil pH. Enter current pH, target pH, soil type, and area for accurate amendment amounts.

Sprinkler Coverage Calculator

Calculate how many sprinklers you need for your lawn. Select sprinkler type and enter lawn area for spacing and quantity recommendations.

Tree Height Estimator

Estimate the height of a tree using the shadow method. Measure shadows and a known object to calculate tree height without climbing.

Tree Mulch Ring Calculator

Calculate how much mulch you need for a tree ring. Enter tree trunk diameter, ring width, and depth to get volume in cubic feet or cubic meters.

Tree Planting Spacing Calculator

Calculate how many trees fit from planting area, mature spread, and row spacing. Returns tree count for square, triangular, and row layouts in feet.

Water Tank Size Calculator

Calculate water tank size from daily usage and storage days. Returns required volume in gallons and liters for rainwater harvesting and off-grid water systems.

Weed Barrier / Landscape Fabric Calculator

Calculate rolls of landscape fabric needed from garden bed dimensions in feet or meters. Returns square footage, roll count with 10% overlap, and staple count.