Specialty calculators

Kitchen gardening and raised beds

Filling the beds, balancing the heap, spacing the rows and running the water.

Soil and compost for a raised bed

Fill volume, mix, bags and delivered weight for a raised bed.

Compost carbon to nitrogen

Blended C:N for a heap, and the browns needed to correct it.

Plant spacing and seeds

Plants per bed, rows, seed count and area per plant.

Fertiliser rates from an NPK label

Product weight for a nitrogen rate, and what P and K come with it.

Drip line flow and run time

Run time, system flow and precipitation rate for a drip line.

Grow-light DLI

DLI from PPFD and hours, and what a target would need.

These are planning figures, not a substitute for a standard, a specification or a professional. Check anything that matters against the source your trade actually works to.