Originally posted by F4UDOA
Does anyone have an IAS to TAS conversion chart for various alts?
Nope, but I can easily make one for you based on the U.S Standard Atmosphere 1976. Prepared by the USAF, NASA, and the NOAA.
Just look up the altitude in the left column and then read off the multiplier in the right column. To get from TAS to IAS multiply the TAS value by that number. To get from IAS to TAS divide the IAS value by that number.
You can use it regardless of the airspeed units so it works for mph, knots, or kmh.
Altitude Multiplier
0 = 1.0000
500 = 0.9927
1000 = 0.9854
1500 = 0.9782
2000 = 0.9709
2500 = 0.9638
3000 = 0.9566
3500 = 0.9495
4000 = 0.9424
4500 = 0.9353
5000 = 0.9282
5500 = 0.9212
6000 = 0.9142
6500 = 0.9072
7000 = 0.9003
7500 = 0.8934
8000 = 0.8865
8500 = 0.8797
9000 = 0.8728
9500 = 0.8660
10000 = 0.8593
10500 = 0.8525
11000 = 0.8458
11500 = 0.8391
12000 = 0.8325
12500 = 0.8259
13000 = 0.8193
13500 = 0.8127
14000 = 0.8061
14500 = 0.7996
15000 = 0.7931
15500 = 0.7867
16000 = 0.7802
16500 = 0.7738
17000 = 0.7675
17500 = 0.7611
18000 = 0.7548
18500 = 0.7485
19000 = 0.7422
19500 = 0.7360
20000 = 0.7298
20500 = 0.7236
21000 = 0.7175
21500 = 0.7113
22000 = 0.7053
22500 = 0.6992
23000 = 0.6931
23500 = 0.6871
24000 = 0.6811
24500 = 0.6752
25000 = 0.6693
25500 = 0.6634
26000 = 0.6575
26500 = 0.6516
27000 = 0.6458
27500 = 0.6400
28000 = 0.6343
28500 = 0.6285
29000 = 0.6228
29500 = 0.6171
30000 = 0.6115
Hope that helps... Say thank you Badboy
Badboy
