Arrow Speed and Kinetic Energy Calculator
Estimate FPS and KE together to compare mass-versus-speed tradeoffs quickly.
Speed = Ref Speed x sqrt(Ref Weight / Your Weight) x Efficiency. KE = (grains x fps x fps) / 450240.
FAQ
What does this combined calculator help with?
It helps compare whether a heavier arrow gain is worth the expected speed reduction for your setup goals.
Is kinetic energy enough by itself?
No. Use KE with momentum, FOC, and broadhead flight validation for complete setup decisions.
How should I verify results?
Use a chronograph for real FPS and then recalculate KE with measured speed.
Speed and KE Comparison Flow
This combined model is useful when comparing nearby arrow masses, for example 400 grains vs 450 grains. Keep reference settings constant and vary only arrow weight to evaluate tradeoffs clearly.