How this calculator works
A round is one complete cartridge, so the price per round is the box price divided by the number of rounds in the box. Multiplying the rate by a count gives a box price, and dividing a budget by the rate gives the number of rounds it buys. The cost per hundred is a convenient shelf comparison because ammunition boxes come in sizes from 20 to 500 rounds. The table applies the same rate to common box counts. The calculation covers the ammunition only and excludes tax, shipping, range fees and any bulk discount that applies to a larger purchase.
Formula
price per round = box price / number of rounds. box price = price per round x number of rounds. rounds = budget / price per round. price per 100 rounds = price per round x 100. The whole-round figure rounds the quotient down, because a part round cannot be bought.
Worked example
A $24.99 box of 50 rounds is $0.4998 per round, which is $49.98 per 100 rounds. At $0.40 per round, 100 rounds cost $40.00. A $100 budget at $0.25 per round buys 400 rounds.
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Frequently asked questions
Does the price include tax and shipping?
No. Enter the total you actually pay, including tax and any shipping, if you want a true delivered cost per round. A low shelf price with high shipping can be worse than a higher local price.
Why compare by the hundred?
Boxes come in different counts, so the per-round rate is the clean comparison and the per-hundred figure is an easy mental check. A 20-round box at $12.99 and a 50-round box at $24.99 are $0.65 and $0.50 per round respectively.
Is a round the same as a bullet?
No. The bullet is only the projectile. A round, or cartridge, includes the case, primer, propellant and bullet. Ammunition prices are normally quoted per complete round.
Can I enter a partial round count?
The number of rounds is a whole number. The count mode can return a fractional result before it is rounded down, because a budget may not divide evenly by the price of one round.