Well we discussed it a little while ago in this topic :
turns out while C2 current formula (which will change and will solve the issue) isn't as accurate (it gives a slitghly higher and longer jump), you can use this to find a good ballpark value (later it will be almost perfect)
in your case
Jump Strength = 650
Gravity = 1500
so final Y = -H = -(JumpStrength^2)/(2*Gravity) = -140,8333...
Just tested it, gives around -143.54 with the current behavior, -140.90 with the "corrected one"
Also acceleration and deceleration only affect the X axis, JumpStrength, jump sustain and gravity affect the Y axis
I nevered bothered to calculate with jump sustain though...