Tools & calculators
Quick planning tools for the numbers that matter: spacing, fertilizer, income, and dates. Everything runs in your browser — nothing is sent anywhere, and the site works offline.
Spacing & population
How many plants (and cuttings) fit your field at your ridge and in-row spacing. See Planting for the details.
Fertilizer rate
How much of your NPK blend covers your target rates. Starter targets are prefilled — see Nutrition for guidance.
Yield & income
Estimate tonnage, revenue, and margin for a field. The assumptions are adjustable — see Economics.
Irrigation scheduling
When to water, based on soil, growth stage, and how fast the crop uses water. See Irrigation for the stage-by-stage details.
Break-even price & yield
The price or yield you need just to cover costs — the number that tells you whether a season is worth planting. See Economics.
Kamote chips & processing
Is a small processing batch worth it? Estimate product weight, costs, and margin for chips or snack batches — the numbers behind Processing as a Micro-Enterprise.
Storage & curing sizing
Size a store for your harvest and estimate what losses will cost you. Curing and storage specs come from Curing & Storage.
Planting → harvest dates
Estimate your harvest window from the planting date and maturity class. See Varieties for maturity ranges.
Variety selector
Shortlist known varieties by what matters to you: flesh color, season length, and region. Details in Varieties.
Pest & disease symptom key
What is wrong with this crop? Answer a few questions and the key narrows it down — then follow the link for full control details.
Keep field records
Numbers from your own field beat any estimate — use the printable field journal to track planting, inputs, and harvests across seasons.
Online resources
Trusted organizations with free sweet potato information, data, and training materials. Always double-check variety, chemical, and practice recommendations with your local extension service.
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Sweetpotato Knowledge Portal
Free portal by the International Potato Center (CIP) covering breeding, seed systems, agronomy, and post-harvest — with training materials and variety information.
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International Potato Center (CIP) — Sweetpotato
The global research center for sweet potato: science, publications, and the world's largest sweet potato genebank.
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HarvestPlus
The biofortification program behind orange-fleshed sweet potato (OFSP) — variety releases and vitamin A nutrition programs, especially in sub-Saharan Africa.
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FAOSTAT (FAO)
Free production, area, yield, and trade statistics for sweet potato and every other crop, by country and year.
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Your national extension service & weather service
Local variety recommendations, pesticide registrations, soil-testing labs, and planting-window weather forecasts beat any general advice — ask before you plant.
Pro tip: tools are estimates, not guarantees
These calculators use the typical figures from the knowledgebase. Real results vary with soil, weather, variety, and management — use them for planning, then adjust with your own field records (see Economics).