Chemcalc
chem calculator for farmers
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Chemcalc is a practical spray planning app for farmers, contractors, and agronomists working in New Zealand and Australia. It helps you work out application rates, tank loads, and product totals quickly and clearly, so you can spend less time on arithmetic and more time in the field.
Use the spray rate calculator to plan a job from the basics that matter: area, water rate, product rate, tank size, and equipment. Chemcalc works out how much product you need, how many tank loads are required, and keeps the maths consistent as you adjust inputs. You can save completed calculations and open them again later when you need to repeat a job or check what you used last time.
Build a library of your own chemicals with label information at hand. Add and edit products, attach photos, and open label PDFs when you need to confirm rates, restrictions, or other label details. Label PDFs can be saved locally after you view them, so they are available again even when you are offline. Rates from labels can be applied in the calculator to reduce manual entry and mistakes.
Create tank mixes that combine several products into one recipe, and save spray equipment profiles for tractors, trucks, helicopters, and other setups with tank capacity, speed, and boom width. The flow rate calculator helps you turn a single nozzle measurement into total flow and application rate, which is useful when checking or setting up application equipment.
When you need transport paperwork, Chemcalc can help you draft a dangerous goods consignment note from a saved job and label data, pulling together the shipping information required for moving agricultural chemicals.
Chemcalc supports both metric and imperial units, so you can work in hectares or acres, litres or gallons, and the product units that suit your operation. The app is designed to be straightforward on phone and tablet, with a clean layout and tools grouped on the home screen so common tasks are easy to find.
If something is missing, incorrect, or you want a product added, you can send feedback directly from the app without setting up email on your device.
Chemcalc is built for real spray work in NZ and AU conditions, with label-aware tools, saved workflows, and calculators that fit how spraying is actually planned and checked in the paddock or on the road.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
have added a chemical strength calculator, so if you have a product and rate for a600g/ha but your onsite chemical is 500g/ha it will calculate the rates it should be applied at to equal the strength and rate
The developer, F-JAP INDUSTRIES LIMITED, 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
- F-JAP INDUSTRIES LIMITED
- Size
- 56.4 MB
- Category
- Utilities
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPad
Requires iPadOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
- Ad removal $9.99
- Copyright
- © FJAP INDUSTRIES 2025