Formula
- Use the units shown beside each field.
- Results update automatically whenever you change an input.
- Displayed values use up to four decimal places, or scientific notation for very small or large numbers. Calculations use standard floating-point arithmetic; exact integer and fraction tools identify their own precision rules.
- Bearings must use the same true or magnetic reference. Educational vector decomposition, not an operational clearance or aircraft limit check.
Example Calculation
- Wind speed: 20 kn
- Wind-from bearing: 90 °
- Reference heading: 0 °
Wind from 090° at 20 kn across a 000° heading gives 20 kn from the right and zero headwind.
Frequently asked questions
How do I use this calculator?
Enter wind speed, wind-from bearing, reference heading. The result updates automatically. Use Reset to restore the example values.
What method does it use?
headwind=V cos(wind-from−heading); right-side crosswind=V sin(wind-from−heading).. Bearings must use the same true or magnetic reference. Educational vector decomposition, not an operational clearance or aircraft limit check.
Why might a rounded result differ?
The calculation keeps full numeric precision internally, then rounds the displayed result. Rounding intermediate steps by hand can produce a slightly different answer.
Are my inputs saved online?
No. This calculator processes your inputs in your browser. A recently used list stores only calculator names on this device, not your entered values.
Check the assumptions and units before using this result. Read about calculation methods.