Plant Note

Practical plant tools

Plant calculators for everyday growing

Enter the dimensions, ratios, light readings, or energy details you already have and get a clear result without working through the formulas yourself.

Potted plant, measuring cup, nursery pots, grow light, and calculator arranged as gardening calculation tools

Available calculators

Choose a calculation

Choose the calculator that matches the measurements you have. Results update instantly and explain the units and assumptions used.

A tapered nursery pot measured across its rim and height beside a scoop of potting mix
Pots and potting mix Potting Soil Calculator: How Much Mix for a Pot?

Choose a reference nursery-pot size or enter inside dimensions to estimate potting mix instantly, including fill level, pot count, and space occupied by a root ball.

Open calculator
A potted plant under a grow light with a light sensor positioned at canopy height
Light and grow lights Plant Light Calculator: Lux, PPFD, DLI and Foot-Candles

Choose the measurement you have and get an instant lux, foot-candle, PPFD, or DLI result. The calculator labels fixed unit conversions separately from spectrum-dependent estimates.

Open calculator
Separate bowls of bark, perlite, and coir being combined in a green mixing bowl
Pots and potting mix Potting Mix Ratio Calculator: Amount of Each Ingredient

Enter the finished batch volume, then describe each ingredient in parts or percentages. The calculator instantly scales the recipe, and you can rename, add, or remove ingredients.

Open calculator
A grow light illuminating a potted plant with its cord connected through an energy meter
Light and energy Grow Light Electricity Cost Calculator

Enter the actual input wattage per fixture, the number of lights, and the operating schedule to estimate energy use and cost for any period. Replace the example electricity rate with the rate from your own bill.

Open calculator
A dropper, an unlabeled concentrate bottle, and a clear jug of water arranged for dilution
Fertilizer and mixing Liquid Fertilizer Dilution Calculator

Choose the format printed on the liquid fertilizer label, enter the final batch volume, and get the concentrate amount immediately. Metric and US customary label rates are supported.

Open calculator
An intact root ball lifted from a small pot beside a larger empty pot and fresh mix
Pots and potting mix Repotting Soil Calculator: How Much Extra Mix?

Choose the current pot, the larger pot, and whether the root ball stays intact or loses some old mix. The estimate updates instantly.

Open calculator
Common nursery pots arranged from small to large beside an unbranded bag and scoop of potting mix
Pots and potting mix Potting Soil Bag Calculator and Pot Size Chart

Enter the bag size you have to compare potting mix per reference pot, full pots per package, and the number of bags needed for your selected pot count.

Open calculator