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Publication #ENH90

Pesticide Calibration Formulas and Information1

J. Bryan Unruh2

CALIBRATION FORMULAS

Acres Covered Per Hour. 

Gallons Per Acre (GPA). 

Gallons Per 1000 Square Feet. 

Ounces Per 1000 Square Feet. 

Gallons Per Minute (GPM). 

Gallons Per Minute (GPM) Per Nozzle. 

Minute Per Acre. 

Minutes Per Load. 

Travel Speed (Miles Per Hour, MPH). 

Acres Covered Per Tank. 

Material Needed Per Tank. 

Flow Rate (As Influenced by Pressure). 

calculate the resulting GPA. 

HELPFUL CALCULATIONS AND FORMULAS

Rectangle, Square, or Parallelogram. 

Trapezoid. 

Circle. 

Sphere. 

Triangle. 

Cylinder. 

FINDING TANK CAPACITY (GALLONS)

Cylindrical Tanks. 

Rectangular Tanks. 

Elliptical Tanks. 

FLUID APPLICATION

Pounds Per Acre Nutrient Applied. 

PPM (Parts Per Million). 

Pounds Active Ingredient (lb ai) to Use Per Tank. 

Pounds (lb) Commercial Material to Use Per Tank. 

Fluid Ounces (fl oz) to Use Per Tank. 

Gallons (gal) Commercial Material for Total Treated Acres. 

PESTICIDE APPLICATION RECORD

Tables

Table 1. 

Time (seconds) required to cover a specific distance to obtain a desired speed (mph).

Time required (seconds) to travel a distance of
Desired MPH Feet per minute 100 ft 200 ft 300 ft
2.0 176 34 68 102
2.5 220 27 54 81
3.0 264 23 45 68
3.5 308 20 39 58
4.0 352 17 43 51
4.5 395 15 30 45
5.0 440 14 27 41
6.0 528 -- 23 34
7.0 616 -- 19 29
8.0 704 -- 17 26
9.0 792 -- 15 23
Table 2. 

Approximate Rates of Application Equivalents.

Weights

Liquid

1 oz/ft2 = 2722.5 lbs/A

1 oz/1000 ft2 = 43.56 oz/A = 1.4 qt/A

1 oz/yd2 = 302.5 lbs/A

1 pt/1000 ft2 = 5.4 gal/A

1 oz/100 ft2 = 27.2 lbs/A

100 gal/A = 2.3 gal/1000 ft2 = 1 qt/100ft2

1 oz/1000 ft2 = 43.46 oz/A = 2.72 lbs/A

1 lb/A = 1 oz/2733 ft2 = 8.5 g/1000 ft2

100 lb/A = 2.5 lb/1000 ft2

Footnotes

1.

This document is ENH90, one of a series of the Environmental Horticulture Department, Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida. Original publication date November 1993. Reviewed September 2006. Visit the EDIS Web Site at http://edis.ifas.ufl.edu.

2.

J. Bryan Unruh, Assistant Professor, Extension turf specialist, Environmental Horticulture Department, Cooperative Extension Service, West Florida Research and Education Center, Institute of Food and Agricultural Sciences, University of Florida, Jay FL 32565.

No liability is assumed by the author or the University of Florida for the use of formulas in this publication.

The Institute of Food and Agricultural Sciences (IFAS) is an Equal Opportunity Institution authorized to provide research, educational information and other services only to individuals and institutions that function with non-discrimination with respect to race, creed, color, religion, age, disability, sex, sexual orientation, marital status, national origin, political opinions or affiliations. For more information on obtaining other extension publications, contact your county Cooperative Extension service.

U.S. Department of Agriculture, Cooperative Extension Service, University of Florida, IFAS, Florida A. & M. University Cooperative Extension Program, and Boards of County Commissioners Cooperating. Millie Ferrer-Chancy, Interim Dean.