Gardening Tools & Calculators
Soil & Compost
Soil Volume Calculator
Work out how much soil to fill a raised bed or pot, in litres, cubic feet, and bags.
Use Calculator →Mulch Calculator
Find how much mulch your bed needs at the right depth, with extension depth guidance.
Use Calculator →Soil pH Amendment Calculator
Estimate the lime to raise pH or sulfur to lower it, by soil type and area.
Use Calculator →Compost Ratio Calculator
Check your browns-to-greens mix against the balance compost microbes work best at.
Use Calculator →Planting & Houseplants
Plant Spacing Calculator
See how many plants fit a bed at a given spacing, and how many per square foot.
Use Calculator →Repotting Soil Calculator
Work out how much potting mix a pot needs before you open a bag.
Use Calculator →Fertiliser Dilution Calculator
Turn a label dose into the exact feed for your watering can, at full, half, or quarter strength.
Use Calculator →DLI Calculator
Turn a light-meter reading and hours of light into a daily light integral for your plants.
Use Calculator →Pest Control
Pest Spray Dilution Calculator
Mix neem oil, insecticidal soap, or horticultural oil to the right strength every time.
Use Calculator →Hydroponics & Aquascaping
EC to PPM Calculator
Convert nutrient strength between EC and PPM across the 500, 640, and 700 meter scales.
Use Calculator →Reservoir EC Dilution Calculator
Work out exactly how much water to add to bring a too-strong reservoir down to target.
Use Calculator →Aquarium Volume & Substrate Calculator
Find your tank's real volume and the substrate needed for a planted setup.
Use Calculator →