Worked example

A recorded cost of 30.00 for 100 rounds produces 0.3000 per round. A quantity of zero cannot produce a unit cost.

How the calculation works

Cost per round equals total cost divided by quantity. The display uses four decimal places because small unit costs can lose useful precision at two. Decide whether tax, fees, or delivery are included before entering the total.

What the result does not establish

This is purchase-record arithmetic. It does not compare current prices, advise on ammunition choice, or establish compatibility. It does not read your app records.

Keep the connected record.

Coldbore keeps firearm identity, photos, documents, maintenance, and range sessions together on your iPhone or iPad.

Unlimited records, ordinary reports, exports, iCloud Backup, and app lock stay free. Collection Check, Collection Pack, Renewals, and Costs and history need optional membership.

Get Coldbore free

iOS 17 or iPadOS 17 and later. No Coldbore account.

Reviewed October 2, 2026.