Our old website we had a reloading cost calculator and we dropped it on our new site. However, we've had many requests to add it back, so we did. Enter your prices for power (and charge weight), primers, bullets, etc. Then enter the cost of factory ammo that you pay at your favorite store. Remember to add in any shipping costs (like HazMat), taxes, etc. Each time you update a number in the blue cells, the numbers are updated to reflect the new calculations.
Sample information is currently in the blue cells, so change it to your data to see the new savings.