1. What is a Ft Pound Energy Calculator?

Definition: This calculator determines the kinetic energy of a projectile in foot-pounds based on its mass and velocity.

Purpose: It helps firearms enthusiasts, hunters, and ballisticians evaluate the stopping power and energy transfer of projectiles.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( E \) — Energy (foot-pounds)
• \( m \) — Mass (grains)
• \( v \) — Velocity (feet per second)

Explanation: The formula calculates kinetic energy by multiplying mass by velocity squared, then dividing by the constant 450240 which converts grains and ft/s to ft-lbs.

3. Importance of Energy Calculation

Details: Understanding projectile energy helps in selecting appropriate ammunition for hunting, self-defense, or target shooting based on desired impact characteristics.

4. Using the Calculator

Tips: Enter the projectile mass in grains and velocity in feet per second. Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why is the constant 450240 used?
A: This constant converts grains and ft/s to ft-lbs (1 grain = 1/7000 lb, and we need to account for gravitational acceleration).

Q2: What's a typical energy range for hunting ammunition?
A: Most states require at least 1000 ft-lbs for big game hunting, with larger game needing 1500-2000+ ft-lbs.

Q3: How do I find my bullet's velocity?
A: Check ammunition manufacturer specifications or use a chronograph to measure actual muzzle velocity.

Q4: Does this account for energy loss over distance?
A: No, this calculates muzzle energy. For downrange energy, you'd need to input the actual velocity at that distance.

Q5: What's the difference between energy and momentum?
A: Energy (ft-lbs) indicates stopping power, while momentum (lb-ft/s) indicates penetration capability. Both are important for terminal ballistics.