Batch Mix Calculator

Know your mix before you start.

Batch Mix is a local-first calculator for pressure-washing and soft-washing work. Enter your batch size, source strength, and target strength to estimate SH and water amounts in gallons or liters.

CALCULATE IN THE FIELD
• Plan SH and water batch amounts
• Switch between gallons and liters
• Account for surfactant displacement
• Estimate downstream injector strength
• Save useful mix notes on your device

START WITH THE FREE CALCULATOR
The Basic Calculator, unit switching, saved mixes, and a limited number of Surfactant Helper calculations are available without a subscription.

ADD BATCH MIX PRO WHEN YOU NEED MORE
Pro adds Advanced Mode, downstream planning, Recipe Builder, the Field Guide, and continued Surfactant Helper access. Subscription prices and any eligible introductory offer are shown by Google Play before purchase.

LOCAL-FIRST BY DESIGN
• No account required
• No ads
• Core calculation and guide content work offline
• Saved setups stay on the device

Batch Mix provides estimates and general reference information. Actual draw rates, chemical strength, surface conditions, and equipment performance vary. Always follow product labels, safety data sheets, manufacturer instructions, equipment instructions, and local requirements. Test a small area first.