Biochar and Soil Amendment by Volume
Size biochar, compost or substrate amendments as a percent of bed volume, including charging compost, weight, carbon and cost.
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Tools & Calculators
Every tool in one place. Search or pick a category, then start doing the math.
Soil & Raised Beds
Soil volume, blends, bed dimensions and drainage.
New
Plant Spacing
Square-foot layouts and companion spacing.
New Sweet Corn Isolation Distance Calculator
Check whether your sweet corn stays sweet against nearby dent corn or seed corn by distance or by flowering stagger, and size the planting block.
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Watering & Irrigation
Drip flow rates, run times and rainwater catchment.
New Drip and Spray Irrigation Install Cost Calculator
Price a drip or micro spray irrigation install as materials, zoning and trenching, DIY against contractor, with payback years.
Use ToolNew Pot Drainage and Watering Frequency Calculator
Size the drainage holes a pot needs and work out the watering interval, weekly gallons and soak depth for a plant and pot material.
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Fertilizer & Nutrients
NPK, soil pH and organic dosing calculators.
New Compost Tea & Liquid Dilution Calculator
Turn a product analysis and a target ppm nitrogen into millilitres per litre, ounces per gallon and a 1-to-n ratio for the tank you are mixing.
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Planning & Yield
Season planners, succession sowing and harvest math.
New Stand Basal Area and Stocking Calculator
Work out the basal area of a woodlot from tree count and diameter, compare it with the target for your cover type and size the cut.
Use ToolNew Garden Cost and Savings Estimator
Compare what a garden costs to run against the groceries it replaces, including setup amortisation, inputs and the value of your own hours.
Use ToolNew Calories Per Bed Garden Planner
Plan a garden for food rather than money by working out the calories a bed grows, the days of eating it covers and the ground one person needs.
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Indoor & Hydroponics
Grow light, nutrient solution and reservoir sizing.
New Water Potential Calculator
Calculate solute and total water potential from the van 't Hoff relation, in bars, megapascals and psi, with a water-movement verdict.
Use ToolNew Aeroponics Misting Duty Cycle Calculator
Convert nozzle count, flow and timer on-off seconds into duty cycle, daily water, pump run hours and the root dry interval.
Use ToolNew Grow Tent Heat Load Calculator
Turn fixture wattage into BTU per hour, then size the exhaust that holds your temperature rise and check the fan you already own.
Use ToolNew Hydroponic System Cost Estimator
Price a hydroponic build as startup, power and nutrients per cycle, then compare the harvest against what the same food costs at the store.
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Lawn & Turf
Seed rates, sod counts and sprinkler run times.
New Lawn Topdressing Calculator
Work out how much compost or soil a lawn needs at a quarter to half inch, in cubic feet, yards, bags, wheelbarrow loads, weight and cost.
Use ToolNew Lawn Mowing Cost Calculator
Compare mowing your own lawn against hiring it out, in cash, fuel, machine wear and the hours your time is really worth.
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Seeds & Propagation
Germination tests, sowing density and potting mixes.
New Seed Vault Storage Life Calculator
Estimate how long saved seed keeps from storage temperature and humidity, then plan germination rate, seeding density and a replant year.
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Landscaping & Hardscape
Rock tons, pine straw bales and material coverage.
New Pond Liner and Gravel Calculator
Size the liner sheet, folds allowance, underlay, water volume and bottom gravel for a pond from length, width, depth and edge overlap.
Use ToolNew Landscape Job Pricing Calculator
Build a landscaping bid from crew hours, materials, equipment and job-type overhead, then compare markup price against a true margin price.
Use ToolNew Landscape Fabric & Edging Calculator
Size a weed barrier roll order and the edging, staples and cost that go with it, including the overlap you lose to seams.
Use ToolNew Tree Value Calculator (TRIA Trunk Method)
Appraise a landscape tree with the trunk method: cross sectional area times a unit value, adjusted by species, condition and site.
Use ToolNew Tree Removal and Trimming Cost Calculator
Break a tree removal quote into crew hours, rigging, debris loads and stump grinding, then bracket the total so you can judge a bid.
Use ToolNew Timber Value and Stumpage Calculator
Price a woodlot standing timber from Doyle scale, species stumpage and merchantable share, then subtract logging to find net value.
Use ToolNew Land Clearing Cost Calculator
Cost clearing acres of brush and trees by machine or hand, covering hours, debris loads, stumps, grading and price per acre.
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