Spray Tank Mix Calculator

Free spray tank mix calculator for lawn care pros. Enter your product rate, treatment area, and tank size to get exact per-tank fill amounts, product totals, and cost per 1,000 sq ft. Includes a fertilizer rate calculator with soil test integration. No signup required.

What you can calculate

  • Per-tank mix amounts — how much product goes in each tank load for the area you're treating.
  • Fertilizer rates — pounds of product and pounds of nitrogen per 1,000 sq ft by bag analysis.
  • Cost per 1,000 sq ft — compare products on real applied cost, not bag price.

Need more? Browse all free lawn care tools or measure a lawn from satellite imagery.

Frequently asked questions

How do I calculate how much product to put in my spray tank?

Multiply the product's label rate (per 1,000 sq ft or per acre) by the area you're treating, then divide the total across however many tank loads the job needs. Enter the area, product, and rate above and the calculator does this for you, including per-tank amounts.

How do I figure out spray rate per 1,000 square feet?

Take the product's labeled rate for your target pest or use, expressed per 1,000 sq ft, and multiply by the number of thousands of square feet you're treating. A 5,000 sq ft lawn at 1.5 oz per 1,000 sq ft needs 7.5 oz of product.

How much fertilizer do I need for my lawn?

Divide your target pounds of nitrogen per 1,000 sq ft by the nitrogen percentage in the fertilizer's N–P–K analysis to get the bag rate, then multiply by the lawn's thousands of square feet. The Fertilizer tab calculates the bag rate and total product for you.

Why does mixing the right spray rate matter?

The product label rate is legally binding. Under-applying wastes the trip and lets weeds or pests survive; over-applying can burn turf, break the label, and cause runoff. Accurate per-area math keeps every application both effective and compliant.

Is the spray mix and fertilizer calculator free?

Yes. Both calculators run in your browser with no signup required. TurfTechAdvisor also saves these calculations against each customer and treatment round if you create a free account.

Start free — up to 25 customers, GPS routing, EPA records, and the mobile crew app. No credit card required.