A mixed kitchen garden should not use one yield rate for every square metre. Different crops occupy different areas and produce different harvest amounts over the period being considered. Some of that gross harvest may also be unusable.
The Garden Harvest Yield Calculator provides a row for each crop. Enter assigned area, estimated gross period yield in kilograms per square metre and the expected unusable share. It shows gross and usable harvest for each row before adding the totals.
Two illustrative crop rows
For tomatoes on 5 m² at an entered period rate of 3 kg/m², gross harvest is 15 kg. With 10% unusable harvest, the usable amount is 13.5 kg.
For leafy greens on 3 m² at 1.5 kg/m², gross harvest is 4.5 kg. A 5% unusable share leaves 4.275 kg. Together, these assumptions produce 19.5 kg gross and 17.775 kg usable harvest across 8 m² of allocated crop areas.
These rates are examples for the arithmetic. They are not verified averages for a Pakistani crop, location, variety or season, and the calculator does not turn them into guaranteed outcomes.
Give every row a matching period
One crop's weekly harvest and another crop's whole season harvest should not be added as if they described the same period. Choose a common reporting window and make each rate correspond to it.
The area total adds the row areas without checking their physical layout. If crops share ground at different times, the sum may represent area allocations over a sequence rather than a simultaneous footprint. Record that distinction instead of treating the reported total as a surveyed garden size.
If you already have an observed total in kilograms, divide it by the relevant crop area to obtain the period rate before entering it. Do not place the total harvest into the kg/m² field unchanged unless the area really is one square metre.
Usable does not always mean used at home
The unusable percentage removes harvest considered unfit or otherwise unavailable for use. It is not automatically the share that replaces shopping. Edible surplus given away or left unused may still be part of the usable harvest.
For household savings, transfer usable kilograms to Kitchen Garden Savings Calculator and specify the share that actually replaces purchased produce. That second step prevents the entire garden harvest from being valued as money saved regardless of household consumption.
Use the row table to compare assumptions and later records. If a projected result differs from the observed harvest, review the crop area, period, rate and losses individually. A lower total alone cannot identify which of those assumptions caused the difference.