Margin Ruler

Margin Leak Calculator

Calculates your actual margin after fees and shipping, and the minimum price required to hit your target margin. Flags products that are losing money or r…

Amazon FBA is active. Other marketplace modules stay marked as planned until audited.

Real Amazon fees, dated to sourceNo account or emailPrivate unless you save
Methodology

Margin Leak Calculator. Estimates per-order margin after product cost, platform fees, and shipping, then compares the result to a target margin.

Fee schedule/source date: generic marketplace fee model verified 2026-05-08.

Read the formula, inclusions, exclusions, and fee-category audit →

Calculator
Regional pages

Regional pages

Margin Ruler keeps a regional page for every active country so calculators stay tied to the local landing context. Browse below; the calculator math is the same on each.

Australia

Canada

New Zealand

United States