Measure pellet power from speed and weight inputs. View joules, foot-pounds, and momentum with clarity. Export data, inspect graphs, and compare realistic velocity changes.
Results appear here after submission, above the form as requested.
0.00 J
0.00 ft-lb
0.0000 kg·m/s
0.000000 kg
| Scenario | Velocity | Energy (J) | Energy (ft-lb) | Momentum (kg·m/s) |
|---|
The graph uses your pellet weight and the velocity range entered above.
Main kinetic energy formula:
E = 1/2 × m × v²
Where E is energy, m is pellet mass in kilograms, and v is muzzle velocity in meters per second.
Common shooting shortcut:
Energy (ft-lb) = [Pellet Weight in grains × Velocity² in fps] ÷ 450240
Conversions used:
| Pellet Weight (gr) | Velocity (fps) | Energy (J) | Energy (ft-lb) | Momentum (kg·m/s) |
|---|---|---|---|---|
| 8.44 | 800 | 16.27 | 12.00 | 0.1334 |
| 10.34 | 900 | 25.22 | 18.60 | 0.1838 |
| 14.30 | 700 | 21.10 | 15.56 | 0.1977 |
| 18.13 | 850 | 39.45 | 29.09 | 0.3044 |
Muzzle energy is the pellet’s kinetic energy as it leaves the barrel. It depends on pellet mass and muzzle velocity, and it is usually shown in joules or foot-pounds.
Energy rises with both mass and speed, but velocity has a squared effect. Small speed increases can change muzzle energy more than many shooters expect.
They measure the same energy in different unit systems. Joules are metric, while foot-pounds are common in shooting discussions, reviews, and legal references.
Not always. Higher speed can improve flatter trajectories, but pellet stability, accuracy, sound level, and target performance also matter. Energy alone does not guarantee better results.
Yes. A lighter pellet moving faster and a heavier pellet moving slower can produce similar energy. Their momentum, flight behavior, and downrange results may still differ.
This calculator accepts grains, grams, kilograms, and ounces for weight. Velocity can be entered in feet per second, meters per second, kilometers per hour, or miles per hour.
Kinetic energy depends on velocity squared. When pellet weight stays fixed, energy increases faster and faster as velocity rises, which creates the curved line.
No. It helps estimate performance only. Laws and field limits vary by country, region, club, and hunting rules, so always verify local requirements separately.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.