One local plan for feed, light, and real costs.

Local and private

The toolkit saves its last inputs in this browser's localStorage. It has no backend, account, analytics, grow-data upload, live-reading, or device-control path.

Nutrient strength

EC in mS/cm is the primary strength. PPM 500, 640, and 700 values are derived scales, so use the scale printed on your meter. Reservoir size means working solution volume, not the container's maximum capacity.

Light is a planning estimate

Prefer fixture PPF in µmol/s. Watts require user-entered efficacy and produce estimated PPF. Use canopy dimensions, not tent-wall dimensions. DLI, fixture count, canopy average, heatmap, and inverse-square results are models—not a PAR map. Verify the canopy with a PAR meter; inverse-square math is only an approximation.

Costs use honest inputs

Electricity uses actual equipment draw, never equivalent-watt marketing claims. Cost per gram requires user-entered dried, saleable harvest weight—not wet weight. Comparison prices are user-entered; the toolkit supplies no market price or yield promise.

Any stage or crop range shown elsewhere in the toolkit is a typical starting reference, not a guarantee, diagnosis, or instruction to make an aggressive change.