Wind component on climb
A rule of thumb for wind component on climb - if you only want to know how you're going with respect to headwind or tailwind: 3 X Altitude + IAS gives an approximate TAS to compare with your current GS from GPS or DME. E.g. IAS 150 passing 10,000 gives approx TAS 150 + 3 X 10 = 180. GS from GPS 195 gives a wind component of +15. Check at each level passing to see if tailwind/headwind is increasing or decreasing to find the most favourable level for cruise.