How the result is calculated
Product pounds = (area ÷ 1,000 × target nitrogen pounds) ÷ product nitrogen as a decimal.
SproutScale preserves full precision while calculating and rounds only the displayed result or the final purchasable unit.
PRODUCT POUNDS FROM NPK
Fertilizer Application Calculator
Convert a soil-test or label nitrogen recommendation into pounds of fertilizer product.
FREE TOOLLocal
calculationNo garden data uploaded
calculationNo garden data uploaded
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Updates liveEnter your measurements
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Planning result
Fertilizer product30 lb
Actual nitrogen3 lb N
Product analysis10% N
Application area3,000 ft²
Use this as a planning estimate. Verify product labels, local conditions and supplier packaging before buying or applying materials.
Before you act
- Follow a soil test and the product label.
- The first NPK number is percent nitrogen by weight.
- Sweep granules off hard surfaces before watering.
Fertilizer FAQ
What does 10-10-10 mean?
It contains 10% nitrogen, 10% phosphate and 10% potash by weight; this calculator uses the first number.
Can I apply the whole annual amount at once?
Not necessarily. Timing and split applications depend on crop, turf, climate and label directions.