Ammunition, often referred to as ammo, is a collective term for the various materials and components used in firearms, cannons, and other weapons. It includes both the projectile (bullet, shot, or shell) and the propellant (gunpowder or other explosives) necessary to propel the projectile out of the weapon. Additionally, ammunition may contain other components such as a primer, which ignites the propellant, and a casing or shell casing to hold everything together.
The specific type of ammunition varies depending on the type of firearm or weapon it is intended for. Different calibers and gauges of ammunition are designed for specific firearms, and there are various types of ammunition for different purposes, such as target shooting, self-defense, hunting, or military use.
- Sectional Density: Computes the factor used in the computation of the ballistic coefficient called sectional density.

- Bullet Ballistic Coefficient: Computes factor that represents a bullet's ability to overcome air resistance in flight.
- Ballistic Coefficient from Bullet's Mass, Diameter and Form Factor: Estimates the ballistic coefficient from the mass, diameter and form factor
- Miller Twist Rule: Computes the optimal barrel twist rate for stabilizing a bullet's flight given the bullet's diameter, length and mass.
- Taylor Knock-out Factor: Calculates a factor indicating the power of a round,.
- Greenhill Formula for Optimal Rifling Twist Rate: calculate the optimal barrel twist rate for stabilizing a bullet's flight given the bullet's diameter, length, specific gravity and velocity.
- Bullet Flight Range: Computes the maximum range (horizontal distance) traveled by a bullet based on the muzzle velocity, elevation angle and shooter height.
- Muzzle Energy of a Projectile: Calculates the kinetic energy in a bullet immediately after leaving the barrel given the bullet's mass and velocity.
- Recoil Velocity of a Gun: Computes the velocity at which a gun will move in the opposite direction in relation to the projectile that it fired.
- Cost per Round: Computes cost per round of ammunition based on the cost of a container of cartridges and the number of rounds in the container.
Rifle Sight Correction Angles: Computes the Minutes of Angle corrections for rifle sights.
- Shotgun Shell Reloading Cost: Computes the cost to reload used shotgun shells (hulls) with powder, shot, wads and primers.
- Shotgun Shell Loading Cost: Computes the cost to load new pre-primed shells (hulls) with power, shot and wads.
- Metal Ball Weight: Computes the mass (weight) of a spherical metal (e.g., steel) ball based on the size (diameter).
- Metal Cylinder Weight: Computes the mass (weight) of a metal cylinder based on the size (diameter and length).
