Estimate output. Then test the equipment.
Advanced Mode estimates applied SH after a downstream injector and keeps the bucket-test boundary beside the result.
Pro planning toolSH batch planning for the field
Know your mix before you start.
Turn final volume, source strength, and target strength into clear SH and water amounts. Work in gallons or liters, save useful context on your device, and reach for advanced tools only when the job calls for them.
- Free Basic Calculator
- No account
- No ads
- Core tools work offline
App Store update in review. The existing iOS listing will return here after Apple makes it publicly available.
Gallons or litersUse the volume unit already used on the job.
Local-firstSaved setups stay on the device—no Batch Mix account.
Free core calculatorExisting and new users keep the everyday calculation path.
Estimate, then verifyLabels, SDS, equipment tests, and judgment still govern.
The working sequence
From the label to a usable batch.
Batch Mix keeps the everyday path short: enter what you know, read the calculated amounts, and keep the result for later if it is worth saving.
Set the final volume
Start with the amount the tank or container should hold when the batch is finished.
Enter source and target strength
Use the current source label and the target selected through your own training, documentation, and job assessment.
Read SH and water amounts
The calculator returns both values in gallons or liters without turning the estimate into application advice.
Save useful context
Keep the setup and notes locally for reference; clearing app data or uninstalling can remove them.
Three inputs. One clear result.
Input 01Final volume
Input 02Source strength
Input 03Target strength
The underlying dilution math is transparent. Batch Mix handles the arithmetic while you remain responsible for the inputs, chemical choice, surface assessment, and jobsite decision.
Understand the calculator and its boundariesMore when it earns its place
Plan beyond one basic tank mix.
Advanced tools stay separate from the free calculator so the main job remains quick and familiar.
Keep additive volume inside the plan.
Surfactant Helper treats additive as optional displacement so the intended final batch remains clear.
Limited free uses includedSave what will help next time.
Store names, notes, tags, equipment context, and whether you would use a saved mix again—all locally on the device.
No account requiredSee component volumes in one batch.
Build a multi-component plan without treating the calculator as proof that chemicals are compatible.
Pro planning toolGenuine shipping UI
The product—not a marketing mockup.
Every screen below is a genuine capture from the shipping Batch Mix candidate. Marketing composition frames the UI; it does not repaint controls, results, or product state.
A clear boundary
Keep the calculator free. Add Pro when it helps.
Batch Mix does not turn a familiar decade-old calculator into a surprise paywall. The everyday calculation remains available without a subscription.
Batch Mix Free
The core path for planning and remembering an everyday batch.
- Basic SH and water calculator
- Gallons and liters
- Saved mixes and notes
- Included Surfactant Helper uses
- No account and no ads
Batch Mix Pro
Additional planning and reference tools for operators who need more depth.
- Advanced Mode and downstream estimates
- Recipe Builder
- Field Guide
- Continued Surfactant Helper access
- Store-managed monthly or annual plan
Safety boundary
A calculation is a starting point—not permission.
Batch Mix estimates inputs. It does not choose the chemical, concentration, surface method, PPE, runoff plan, or jobsite procedure.
Follow the authoritative source
Current labels, SDS, manufacturer and equipment instructions, training, and local rules govern.
Never guess compatibility
Never mix sodium hypochlorite with acids, ammonia, or unknown chemicals.
Test, protect, and stop
Test a small hidden area, protect people and property, and stop when conditions or expected results are uncertain.
Before you install
Straight answers to practical questions.
Pricing, trials, billing, cancellation, and restore eligibility are confirmed by your app store—not by the marketing page.
Does the Basic Calculator require a subscription?
No. The Basic Calculator, gallons/liters, saved mixes, and a limited number of Surfactant Helper calculations are available without a subscription.
What does Batch Mix Pro add?
Pro adds Advanced Mode, downstream planning, Recipe Builder, the Field Guide, and continued Surfactant Helper access after the free allowance.
What will a subscription cost?
Your Apple App Store or Google Play purchase screen shows the current localized monthly or annual price and whether your store account is eligible for an introductory offer before you confirm.
Where are saved mixes stored?
They stay on your device. Batch Mix does not require an account or sync those records to Stat Central. Clearing app data or uninstalling can remove them, so export available information first when that option is available.
Does the calculator work offline?
The core calculator and guide content work without a network connection. Store purchase checks, restores, and subscription management still depend on Apple or Google services.
What does Batch Mix not replace?
It does not replace labels, SDS, equipment instructions, training, surface testing, jobsite assessment, professional judgment, or local requirements.
Support and trust
Need help with a calculation, purchase, or saved mix?
Start with the focused support guide. If you still need help, email Stat Central with your device, app version, what happened, and the steps leading up to it—without passwords, payment details, or private jobsite information.