TSM Calc helps you calculate fuel and oil mixes for two-stroke engines.
Enter your gas amount and mix ratio to find how much oil to add, or enter gas and oil amounts to calculate the resulting ratio.
• Forward and reverse calculations
• US and metric units, including gallons, quarts, liters, fluid ounces and milliliters
• Preset fuel amounts and mix ratios, plus custom inputs
• Oil amount and total mixture volume
• Save favorite mixes
• Reopen recent calculations from a history of up to 100 entries
• Copy results to your clipboard
• Follows your device’s light or dark theme
No account required. Calculations, favorites and history work on your device. Contains ads.
Use the mix ratio specified by your engine manufacturer.