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🚤 Prop Slip Calculator
Theoretical Speed • Actual Speed • Prop Slip %
Basic
Advanced
Basic Prop Slip
Engine RPM
Prop Pitch (inches)
Gear Ratio
Actual Boat Speed (MPH)
Calculate Prop Slip
Advanced Prop Performance
Engine RPM
Prop Pitch (inches)
Gear Ratio
Actual Speed
Speed Unit
MPH
Knots
Water Type
Freshwater
Saltwater
Calculate Full Metrics
Prop Slip Notes
• Typical prop slip:
5%–15%
• Bass boats: ~5–10%
• Offshore / cruisers: ~10–15%
• Lower slip = higher efficiency