2 Stroke Fuel Mix Calculator

Calculate a 2-stroke (2-cycle) fuel and oil mix for small engines. This premix calculator shows the petrol and 2-stroke oil amounts for your ratio, or works backwards from a target final mix volume. Choose a common fuel-to-oil ratio: 25:1, 32:1, 40:1, 50:1 or 60:1, or enter a custom ratio from 1:1 to 1000:1. Calculate oil for a known petrol amount, or calculate both petrol and oil for the final volume you want. • Clear petrol and oil quantities • Fuel amount and final mix calculations • Litres, millilitres, US gallons and US fluid ounces • Rounding that keeps small oil amounts visible • Your recent inputs are saved on your device, with a reset to the default setup Use this calculator as a general mixing aid only. Always follow your engine manufacturer’s instructions for the correct fuel, oil and mix ratio.

Calculate fuel and 2-stroke oil for common or custom ratios, including final-volume calculations. Supports litres, millilitres, US gallons and US fluid ounces.