Frequently Asked Questions
How do I calculate arrow kinetic energy?
Multiply arrow weight in grains by speed in fps squared, then divide by 450,240. For example, a 420-grain arrow at 280 fps yields about 73 ft-lb of kinetic energy.
How much kinetic energy do I need to hunt deer?
Most authorities recommend at least 25-41 ft-lb for deer-sized medium game. Below 25 ft-lb is suited only to small game, while elk and larger game call for 42 ft-lb or more.
What arrow weight should I include in the calculation?
Use the total finished arrow weight, including the shaft, insert, broadhead or field point, vanes, and nock. Using shaft weight alone significantly underestimates kinetic energy.
Should I use advertised bow speed or chronographed speed?
Always use your actual chronographed arrow speed at your draw length and weight. Advertised IBO speeds are measured under ideal lab conditions and run much higher than real-world results.
Provided by AllCalculators.io
Free online calculators for everyday. No registration required.
Estimates only. Verify regulations and practice safety.
Fishing & Hunting Disclaimer: Estimates only. Verify regulations and practice safety.
This calculator is for educational and informational purposes only. Bag limits, seasons, legal methods, and equipment rules vary by state and locality and change frequently, so always confirm current regulations with your state wildlife agency before fishing or hunting. Follow all firearm and tree-stand safety practices.