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Sail Trim Calculator
Get recommended sail combinations and trim settings for any wind speed and point of sail.
Conditions
12kn
0 kn45 kn
22.2 km/h13.8 mphForce 3
45°
0° (into wind)90° (abeam)180° (running)
Point of Sail Diagram
Close Hauled
Recommended Sail Setup — 12 kn Close Hauled
MainsailFull main, medium tension
HeadsailLarge genoa (G1 / 130–150%)
EngineOff
Trim Settings
TravelerCentered or slightly windward
OuthaulMedium
CunninghamOff
Kicking StrapTight (controls leech twist)
BackstayLoose
i
Comfortable cruising range. Most boats sail well with full main and large genoa. | Close-hauled: sheet in hard, watch the telltales. Keep them streaming. Ease slightly if leech tells stall.
Beaufort Scale Reference
0
<1 kn
Calm
1
1-3 kn
Light air
2
4-6 kn
Light breeze
3
7-10 kn
Gentle
4
11-16 kn
Moderate
5
17-21 kn
Fresh
6
22-27 kn
Strong
7
28-33 kn
Near gale
8
34-40 kn
Gale
9
41-47 kn
Strong gale
10
48-55 kn
Storm
11
56-63 kn
Violent storm
12
64+ kn
Hurricane
🎮Test Your Knowledge
Put your sail trim skills to the test with scenario-based questions covering all points of sail, wind conditions, and control lines. Score points, build streaks, and learn from detailed explanations.
🎮Sail Trim Challenge
Test your sail trim knowledge with 15 real-world scenarios. Each question presents a specific wind condition and point of sail — choose the correct trim response and learn why it works.
15
Questions
150+
Max points
7
Trim Controls
∞
Attempts
💡
How Scoring Works
- Correct answer: +10 points base
- Streak bonus: +2 points per consecutive correct
- Perfect score bonus: +25 points
Tip: Use keyboard shortcuts 1-4 to select answers quickly