Coolant Mix Ratio Calc

Not sure how much coolant concentrate to pour for your target freeze protection? Coolant Mix Ratio Calc tells you the exact amount of antifreeze and water needed for any cooling system — no more guessing at ratios. Enter your cooling system capacity, desired protection level, and coolant type. Get precise coolant-to-water volumes, freeze point, and boil-over protection instantly. COOLANT MIX CALCULATION: Enter system capacity and desired protection level. The app calculates the exact amount of coolant concentrate and water needed for your target mix ratio. Supports 50/50, 60/40, 70/30, and custom ratios. GLYCOL TYPE SUPPORT: - Ethylene Glycol — standard automotive antifreeze, maximum freeze and boil protection - Propylene Glycol — low-toxicity alternative, safer for pets and the environment FREEZE AND BOIL PROTECTION: View freeze point and boiling point protection for any concentration. Know exactly how much protection your current mix provides and what you need to reach your target temperature. VEHICLE PRESETS: Quick-select common vehicle types — Sedan, SUV, Truck, and more — with typical cooling system capacities pre-loaded. SAE AND METRIC UNITS: Switch between quarts/gallons with Fahrenheit and liters with Celsius. All inputs and outputs convert automatically. CURRENT CONCENTRATION ADJUSTMENT: Already have coolant in the system? Enter your current concentration percentage and the app calculates how much to drain and add to reach your target mix. Built for automotive technicians, mechanics, and DIY car owners. Works completely offline — no internet required.