SprayCalc Pro
Tank Mix Spray Rate Calculator
$2.99 · Designed for iPad. Not verified for macOS.
Built by a farmer, for farmers. Calculate tank mixes, find your target speed, save your go-to mixes, and log every spray job — all in one app.
SprayCalc Pro is the essential spray calculator for farmers, custom applicators, and agronomists. Stop doing math in your head or on scraps of paper — get your tank mixes right every time.
TANK MIX CALCULATOR
Enter your tank size, total acres, and target gallons per acre. Add as many chemical products as your mix requires — herbicides, fungicides, insecticides, or fertilizers — in any unit (oz, pt, qt, gal, lb). SprayCalc Pro instantly shows you:
• Exact ounces, pints, quarts, and gallons of each product per tank
• Water fill per tank
• Total product needed for the entire job
• Acres per tank and total tanks needed
• Partial tank callout when acreage doesn't divide evenly
NOZZLE & SPEED CALCULATOR
Two powerful modes to dial in your application:
• Find Target Speed — enter your nozzle GPM, spacing, and target GPA to get the exact MPH to drive
• Find Actual GPA — enter your current speed to see the real gallons per acre being applied
Includes boom width, total flow, acres per hour, a speed vs GPA reference table, and alerts when you're outside safe operating ranges.
SAVED MIXES
Save your go-to tank mixes and reload them in seconds. Tap any saved mix, enter a new acreage, and the app instantly recalculates per-tank amounts. Your mix library is always with you.
FIELD HISTORY LOG
Keep a complete record of every spray job:
• Field name, date, and spray type
• Acres, GPA, tank size, and tanks used
• Every product applied with rate and total amount
• Weather conditions at time of application
• Notes and observations
Log jobs directly from the calculator results screen, or enter them manually. Filter by spray type, search by field name or product, and track season totals at a glance.
DISCLAIMER
SprayCalc Pro is a calculation aid. Always verify application rates against current product labels and consult a licensed agronomist for crop-specific recommendations. Follow all local regulations regarding pesticide application
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Rampant Moxie, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- RAMPANT MOXIE LLC
- Size
- 4.2 MB
- Category
- Utilities
- Compatibility
Requires iOS 16.6 or later.
- iPhone
Requires iOS 16.6 or later. - iPad
Requires iPadOS 16.6 or later. - Mac
Requires macOS 13.5 or later and a Mac with Apple M1 chip or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 RampantMoxie. All rights reserved.
