Reading 10-10-10 as pounds
The first number is nitrogen percentage by product weight.
Care Tool · 2 min
Fertilizer Calculator
Translate the NPK label into pounds of product before fertilizer reaches the bed.
Use area, target nitrogen, and NPK values to estimate fertilizer product amount.
What this tool decides
Decides product amount from actual nitrogen need so you do not overfeed weak plants.
- 1Set your inputs
- 2Calculate the number
- 3Read the plan
Fertilizer
Change any field and the result updates immediately.
Calculated resultEnter your measurements
The practical plan will appear here.
Read the Plan
How to use this result
What it means
Product amount follows the nitrogen target, label percentage, and treated area.
Next action
Apply evenly, remove granules from leaves and hard surfaces, then water into the root zone.
Check these before using the number
Feeding a stressed plant first
Check water, roots, heat, and pests before adding fertilizer.
Calculate nitrogen before pouring product
Fertilizer labels show product analysis. They do not tell you how much nitrogen the bed receives until area is included.
Yellow leaves or weak growth may have another cause, so diagnose the plant before increasing the rate.