🏷️Margin & Markup Calculator
Calculate gross profit, profit margin (profit as % of price) and markup (profit as % of cost) from a unit cost and selling price — the two numbers people constantly mix up.
Worked examples
Cost 60, price 100
GET /api/v1/finance/margin-calculator?cost=60&price=100
Result: 40% margin
SaaS seat: cost 4, price 29
GET /api/v1/finance/margin-calculator?cost=4&price=29
Result: 86.21% margin
Retail: cost 18, price 22
GET /api/v1/finance/margin-calculator?cost=18&price=22
Result: 18.18% margin
Machine API (x402)
$0.001 / callThis tool is also a JSON API for AI agents. Requests without payment receive 402 Payment Required plus instructions; agents pay USDC on Base via the x402 protocol — no accounts, no API keys.
GET /api/v1/finance/margin-calculator?cost=60&price=100 HTTP/1.1
Host: agenttools-hub.vercel.app
→ 402 (payment required, instructions in headers)
→ 200 (after X-PAYMENT header; JSON body below)
{
"tool": "finance/margin-calculator",
"input": {"cost":60,"price":100},
"result": { "value": 40, "answer": "40% margin" }
}Agent docs: /llms.txt · OpenAPI spec · integration guide
About this tool
Margin and markup describe the same profit from two directions: margin compares profit to the selling price, markup compares it to cost. A 25% margin is a 33.3% markup — confusing the two silently underprices products.
margin % = (price − cost) ÷ price × 100 · markup % = (price − cost) ÷ cost × 100
Frequently asked questions
Why is markup always higher than margin?
Markup divides by the smaller number (cost), margin by the larger (price). 100% markup equals only a 50% margin.
What margin should I aim for?
It depends on the industry: grocery runs on 20–30% margins, software often exceeds 80%. Compare within your sector, and make sure margin covers your fixed costs at your sales volume.