Vegetable Yield Calculator

About this calculator

Estimating a harvest before planting means multiplying a crop's typical yield per plant (a figure that varies widely — a tomato plant might give 4-6 kg over a season, a lettuce head just one) by however many plants will actually go in the ground. When plants aren't counted individually — as with a densely broadcast crop like carrots or spinach — the count is instead derived from bed area divided by the recommended plant spacing, giving an equivalent plant count to multiply against.

This calculator takes your per-plant yield and either a direct plant count or a bed area with spacing, and estimates the total harvest you can expect. Home vegetable gardeners planning how much to plant for a household's needs, market gardeners and small-scale farmers forecasting a season's production, and community garden coordinators allocating bed space use it to plan planting quantities against realistic yield expectations rather than guessing and ending up with far too much zucchini or not nearly enough.