Is there math on the Texas pesticide applicator exam?

Yes. The published competencies include calibrating a sprayer to a target application rate (gallons per acre), calculating the product needed for a given area and rate, and tank-mix arithmetic. This page works each type step by step.

How many math questions are on the exam?

TDA does not publish per-topic weights or question counts, so no honest site can tell you an exact number. Prepare to handle each of the three problem types comfortably.

What formula is used for sprayer calibration?

GPA = 5,940 × GPM ÷ (MPH × nozzle spacing in inches). The constant 5,940 carries the unit conversions between acres, feet per minute, and inches — our calibration guide and calculator walk through why.

Are these real exam questions?

No — they are original practice problems written from the published competency statements. We never reproduce official exam items.

Where can I practice more math like this?

The free diagnostic includes calculation questions with fully worked solutions, and the in-app calculation lab generates fresh problems with hints. Both are free.

Texas pesticide exam math, worked step by step

Calculation questions are where prepared people lose points — one careless unit conversion costs a question, and a failed exam costs another $64 and a 24-hour wait. Here are the three problem types the published competencies name, each worked in full, each with an interactive calculator to check yourself.

What the exam actually tests

Two CORE topics carry the math. From Application Equipment & Calibration: "Calibrate a sprayer to deliver a target application rate (gallons per acre)." From Mixing, Loading & Application: "Calculate the amount of product needed for a given area and rate" and "Calculate tank-mix amounts and acres covered per tank." Master those three and you've covered the computational ground the competencies describe.

Problem type 1: sprayer calibration to GPA

Example:each nozzle delivers 0.4 gallons per minute, you drive at 5 mph, and nozzles are spaced 20 inches apart. What's your application rate?

1. Formula: GPA = 5,940 × GPM ÷ (MPH × spacing in inches)
2. Plug in: GPA = 5,940 × 0.4 ÷ (5 × 20)
3. Numerator: 5,940 × 0.4 = 2,376
4. Denominator: 5 × 20 = 100
5. GPA = 2,376 ÷ 100 = 23.8 gal/acre

The 5,940 constant bundles the acre/feet/inch conversions. Check it on the calibration calculator — enter 0.4 / 5 / 20 and compare the worked steps.

Problem type 2: product needed for an area

Example:the label rate is 1.5 pints per acre and you're treating 24 acres. How much product do you need?

1. Formula: total product = rate per acre × acres
2. Plug in: 1.5 pt/acre × 24 acres
3. Total = 36 pints (= 4.5 gallons)

Keep the rate and area in matching units before multiplying. Check it on the application-rate calculator.

Problem type 3: tank mixes and acres per tank

Example: your tank holds 300 gallons, your sprayer is calibrated to 20 gallons per acre, and the label rate is 1.5 pints of product per acre. How many acres does one tank cover, and how much product goes in it?

1. Acres per tank = tank gallons ÷ GPA = 300 ÷ 20 = 15 acres
2. Product per tank = rate × acres per tank = 1.5 pt × 15 = 22.5 pints

The same two moves solve dilution problems. Check mixes on the dilution calculator.

The 4-step method that survives exam pressure

Write the target units first. "I need gal/acre" or "I need pints" — the units tell you which formula applies.
List the knowns with their units. Most wrong answers start with a number grabbed in the wrong unit.
Convert once, before computing. Get everything into matching units, then do the arithmetic in one pass.
Sanity-check the size. A 300-gallon tank can't cover 500 acres at 20 GPA; if the magnitude feels wrong, it usually is.

Common traps: mixing pints with gallons mid-problem, multiplying by spacing in feet when the formula wants inches, and rounding before the final step. Slow is smooth; smooth is fast.

Drill it free

Calculation questions are part of the free, source-cited diagnostic — and the in-app calculation lab generates fresh problems with hints and full worked solutions.

Practice exam math free All three calculators

Go deeper

Equipment & Calibration guide

Nozzles, calibration runs, and the full GPA method.

Mixing, Loading & Application guide

Tank order, jar tests, and the mixing math in context.

Frequently asked

Is there math on the Texas pesticide applicator exam?: Yes. The published competencies include calibrating a sprayer to a target application rate (gallons per acre), calculating the product needed for a given area and rate, and tank-mix arithmetic. This page works each type step by step.
How many math questions are on the exam?: TDA does not publish per-topic weights or question counts, so no honest site can tell you an exact number. Prepare to handle each of the three problem types comfortably.
What formula is used for sprayer calibration?: GPA = 5,940 × GPM ÷ (MPH × nozzle spacing in inches). The constant 5,940 carries the unit conversions between acres, feet per minute, and inches — our calibration guide and calculator walk through why.
Are these real exam questions?: No — they are original practice problems written from the published competency statements. We never reproduce official exam items.
Where can I practice more math like this?: The free diagnostic includes calculation questions with fully worked solutions, and the in-app calculation lab generates fresh problems with hints. Both are free.

Worked examples are original practice grounded in the published competencies — not actual exam items. Facts verified 2026-06-15.