SO4 Equivalent Rate Calculator
Convert sulfur supplied from other sulfur fertilizers into an equivalent SO4 Pelletized Gypsum rate.
At the bottom of the page is a printable cheat sheet reference table showing the equivalent SO4 Pelletized Gypsum rate for common sulfur rates supplied by other products.
Inputs
Summary
This calculator converts sulfur supplied from another product into the equivalent SO4 Pelletized Gypsum rate needed to supply the same sulfur amount.
ATS values entered as gal/acre use a density assumption to convert gallons to pounds before calculating sulfur supplied.
Elemental sulfur options are shown separately as 80%, 85%, and 90% sulfur to match the selected formulation.
Calculation breakdown
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Calculation breakdown
▼Reference Table
Quick reference showing the other product rate needed to supply common sulfur amounts and the equivalent SO4 Pelletized Gypsum rate.
| lb S/acre | SO4 lb/acre | AMS lb/acre | ATS gal/acre | ES 80% lb/acre | ES 85% lb/acre | ES 90% lb/acre |
|---|---|---|---|---|---|---|
| 10 | 59 | 42 | 3.5 | 13 | 12 | 11 |
| 15 | 88 | 63 | 5.2 | 19 | 18 | 17 |
| 20 | 118 | 83 | 7.0 | 25 | 24 | 22 |
| 25 | 147 | 104 | 8.7 | 31 | 29 | 28 |
| 30 | 176 | 125 | 10.5 | 38 | 35 | 33 |
| 35 | 206 | 146 | 12.2 | 44 | 41 | 39 |
| 40 | 235 | 167 | 14.0 | 50 | 47 | 44 |
| 45 | 265 | 188 | 15.7 | 56 | 53 | 50 |
| 50 | 294 | 208 | 17.5 | 63 | 59 | 56 |