4 tools that answer the questions you actually face — pricing, costs, quotes and margins. Type your numbers, get the answer.
Retail pricing rules that never go out of date — the two arithmetic facts behind every markup and every sale.
| Service / metric | 2026 band | Source |
|---|---|---|
| Keystone pricing | 100% markup = 50% margin | Arithmetic rule |
| Markup → margin conversion | margin = markup ÷ (1 + markup) | Arithmetic rule |
| 20% discount at 50% margin | ~+67% volume to break even | Discount math |
| 20% discount at 40% margin | ~+100% volume — double | Discount math |
| Typical retail margin range | 25–50% | Category-dependent; MTB guide synthesis |
Work the numbers: retail math calculator, the retail markup calculator and the discount profit calculator. Counting what you actually stock: the inventory count sheet.
Every tool here runs in your browser — no account, nothing stored on our servers. If you run a retail business and want a tool we haven't built yet, tell us what you'd need — early input goes straight into the build list.