Input Parameters
Advanced options
Example Data Table
These sample scenarios demonstrate typical setups. Click a row to load values.
| # | Area | Area Unit | Rate | Rate Unit | Nutrient | N (%) | P₂O₅ (%) | K₂O (%) | Type | Bag | Bag Unit | Density (kg/L) | Waste % |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 1 | hectare | 120 | kg_ha | N | 46 | 0 | 0 | granular | 50 | kg | 5 | |
| 2 | 2 | acre | 80 | lb_acre | N | 34 | 0 | 0 | granular | 50 | lb | 0 | |
| 3 | 5000 | m2 | 50 | kg_ha | P2O5 | 10 | 50 | 0 | granular | 25 | kg | 3 | |
| 4 | 20000 | ft2 | 1 | lb_acre | K2O | 0 | 0 | 60 | liquid | kg | 1.25 | 2 |
Results
| Required product per area | – |
|---|---|
| Area converted to rate unit | – |
| Total product mass | – |
| Estimated number of bags | – |
| Liquid volume (if density provided) | – |
| Applied wastage allowance | – |
All results auto-convert between metric and imperial for clarity.
Formulas Used
- Product per area =
TargetRate / (ProductPercent / 100) - Total product mass =
ProductPerArea × AreaInRateUnits - Wastage factor =
Total × (1 + Waste% / 100) - Liquid volume (L) =
Mass(kg) / Density(kg·L⁻¹) - Bag count =
TotalMass / BagSize(rounded up)
Area conversions: 1 ha = 10,000 m² = 2.47105381 acres; 1 acre = 4046.8564224 m²; 1 m² = 10.7639104167 ft²; 1 kg = 2.2046226218 lb; 1 US gal = 3.78541 L.
How to Use
- Enter your field area and select the correct unit.
- Choose the agronomic rate unit and target nutrient.
- Input the recommended nutrient rate and product analysis.
- Select product type; add density for liquids to get volumes.
- Optionally set bag size and wastage, then run the calculation.
FAQs
Only the percent for the selected target nutrient is used. For example, if targeting N, the N% from the product analysis drives the product amount.
Yes. The calculator converts area to hectares for kg/ha or to acres for lb/acre automatically before computing totals.
Enter the nutrient %, select liquid, and provide density (kg/L). The tool converts mass to liters and gallons automatically.
Bag count is rounded up to ensure you have enough product on hand after applying the wastage factor.
No. Provide at least the percentage for the nutrient you’re targeting. The others are optional unless you plan different nutrient-based runs.
Typical Fertilizer Analyses (N–P₂O₅–K₂O)
| Product | Grade | Form |
|---|---|---|
| Urea | 46-0-0 | Granular |
| Ammonium nitrate | 34-0-0 | Granular |
| UAN 28 | 28-0-0 | Liquid |
| UAN 32 | 32-0-0 | Liquid |
| DAP (diammonium phosphate) | 18-46-0 | Granular |
| MAP (monoammonium phosphate) | 11-52-0 | Granular |
| MOP (muriate of potash) | 0-0-60 | Granular |
| SOP (sulfate of potash) | 0-0-50 | Granular |
| APP 10-34-0 | 10-34-0 | Liquid |
Grades shown are common; verify your product label before use.
Quick Area & Unit Conversions
| From | To | ||
|---|---|---|---|
| 1 hectare | 2.471054 acres | 10000 m² | 107639.104 ft² |
| 1 acre | 0.404685643005 ha | 4046.856 m² | 43,560 ft² |
| 1,000 m² | 0.100000 ha | — | 10763.910 ft² |
| 1,000 ft² | 0.009290304000 ha | 92.903 m² | — |
| 1 kg | 2.204623 lb | ||
| 1 lb | 0.453592 kg | ||
| Liquid | Density (kg/L) | Approx. lb/gal |
|---|---|---|
| Water (reference) | 1.00 | 8.35 lb/gal |
| UAN 28% | 1.28 | 10.68 lb/gal |
| UAN 32% | 1.32 | 11.02 lb/gal |
| APP 10-34-0 | 1.40 | 11.68 lb/gal |
Urea (46‑0‑0) Application Cheat Sheet
Product amounts delivering the stated nitrogen rate, assuming 46% N.
| N rate | N rate | Urea needed | Urea needed | Per 1,000 m² | Per 1,000 ft² |
|---|---|---|---|---|---|
| (kg/ha) | (lb/acre) | (kg/ha) | (lb/acre) | (kg) | (lb) |
| 25 | 22.30 | 54.35 | 48.49 | 5.43 | 1.113 |
| 50 | 44.61 | 108.70 | 96.98 | 10.87 | 2.226 |
| 75 | 66.91 | 163.04 | 145.46 | 16.30 | 3.339 |
| 100 | 89.22 | 217.39 | 193.95 | 21.74 | 4.453 |
| 150 | 133.83 | 326.09 | 290.93 | 32.61 | 6.679 |
Values ignore wastage; your totals may be higher if applying an allowance.