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Tacking Angle Efficiency Calculator
Estimate velocity made good upwind from boat speed and tacking angle.
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VMG
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Estimate velocity made good upwind from boat speed and tacking angle.
Tacking Angle Efficiency Estimator
Enter your numbers below for an instant estimate.
0
💡 Tip: VMG = speed x cos(angle).
How It Works
Key concepts behind this calculator
1
Enter Values
Fill in each field with your own numbers.
2
Calculate
Results update as you change the inputs.
3
Review
Read the breakdown and the explanation.
4
Adjust
Change values to compare scenarios.
Quick Reference Guide
Tacking Quick Guide
Typical values for reference.
| Speed kn | Angle ° | Spare | VMG kn |
|---|---|---|---|
| 5 | 40 | – | 3.83 |
| 6 | 45 | – | 4.24 |
| 7 | 50 | – | 4.50 |
| 4 | 60 | – | 2.00 |
| Rule of Thumb | Check inputs | Use as a guide | Round sensibly |
Common Questions
Tacking Angle Efficiency Calculator FAQ
Answers to common questions about this calculator.
Cosine.
It gives a quick estimate of tacking angle efficiency from the values you enter.
No. It is a planning estimate, so check important figures with a professional or official source.
Yes. Edit any field and the result updates when you calculate.