This app is a simple set of tools for planningprojects involving concrete. You can use it to:1) Find the amount of concrete you need to lay a slab.2) Estimate the cost of using pre-mixed concrete bags, and findhow many bags you need.3) Get guidance for mixing your own concrete. Just enter theamount of concrete you need for the project along with your desiredcement:sand:gravel mix ratio, and the app will estimate the totalamount you need of each material (in pounds, cubic yards, andgallons or kilograms, cubic meters, and liters).

This is a simple calculator for bullet reloading. Type in themuzzle velocity that you want to get, and the Bullet LoadCalculator will estimate the amount of powder charge that you needto load. All you have to do is enter a few pieces of informationabout the specifications of your bullet/powder/firearm combination.Input: Desired Muzzle Velocity Bullet Weight Minimum Load Specs:Powder Charge and Muzzle Velocity Maximum Load Specs: Powder Chargeand Muzzle Velocity The calculator finds: Suggested Load AmountMuzzle Energy It also provides rough estimates for: The TotalEnergy from the Powder The Energy Lost (due to heat, friction,etc.) The Energy Density of the Powder The Energy Efficiency