Arrow Performance Calculator
Chrono-Validated Data
Bow Settings
Bow Weight
70lbs
IBO Speed @30″
340fps
Draw Length
30in
Chrono Speed (optional)
not set
fps · overrides
estimated speed
estimated speed
Measured speed at your arrow weight
My Build
Arrow Weight
grains · marked ◆
on chart
on chart
Target Distance
40yds
Shaded band shows how far off your arrow hits if you misjudge the range by 3 yards
Build Performance
Arrow Speed
—fps
Est. KE
—ft·lbs
Momentum
—slug·ft/s
Time to Target
—sec
±3 Yard Miss Window
—in
Performance vs. Arrow Weight
350–900 gr · Hover for values · ◆ = My Build
My Build: 450 gr
Speed (fps)
KE (ft·lbs)
Momentum
Time to Target (sec)
±3yd Miss Window
How we calculate this:
v(m) = baseline × √(377 / (m + 27)) ·
baseline = IBO + (DL−30)×10 + (DW−70)×2 ·
Arrow Speed = v × 0.975 · Est. KE = KE × 0.97 ·
Miss window = drop difference at ±3 yds from sight-in distance ·
Virtual mass model fitted to chrono data (RMSE 1.14 fps, 4 bows, 16 points)