# What's my profit margin?

Enter your cost and price to see the margin, or a target margin to see the price you need.

 Cost ($)
 Selling price ($)
 Target margin (%)

### What popular items resell for today

| Item | Cheapest | Typical | You keep (typical, after eBay fee) |
|---|---|---|---|
| [RTX 5090 32GB](https://sharpest.ai/gpus/rtx-5090) | $3,411 | $7,019 | $6,064 |
| [GTX 1080 8GB](https://sharpest.ai/gpus/gtx-1080) | $101 | $140 | $120 |
| [Xbox Series X](https://sharpest.ai/consoles/xbox-series-x) | $490 | $725 | $626 |
| [Sony DualSense controller](https://sharpest.ai/consoles/dualsense) | $33 | $63 | $54 |
| [Samsung Galaxy Z Flip3 128GB unlocked](https://sharpest.ai/phones/galaxy-z-flip3-128gb) | $60 | $69 | $59 |
| [Samsung Galaxy Z Fold5 256GB unlocked](https://sharpest.ai/phones/galaxy-z-fold5-256gb) | $237 | $237 | $204 |
| [iPad 11th generation (A16)](https://sharpest.ai/apple/ipad-11th-gen) | $210 | $401 | $346 |
| [Mac mini M4](https://sharpest.ai/apple/mac-mini-m4) | $613 | $750 | $648 |
| [Ryzen 7 7800X3D](https://sharpest.ai/cpus/ryzen-7-7800x3d) | $275 | $357 | $308 |
| [Ryzen 5 7600X](https://sharpest.ai/cpus/ryzen-5-7600x) | $120 | $185 | $159 |
| [Sony a7 III](https://sharpest.ai/cameras/sony-a7-iii) | $735 | $950 | $820 |
| [Nikon Z6 II](https://sharpest.ai/cameras/nikon-z6-ii) | $799 | $1,021 | $881 |

Current eBay asking prices (item + shipping), checked Nov 12, 2026. Use the typical price as a realistic selling price when you set a markup.

## Price you need for each margin

## How it works

Gross margin = (price − cost) ÷ price. To hit a target margin, price = cost ÷ (1 − margin). Margin can't reach 100%; markup can go above it.

Related: [markup calculator](https://sharpest.ai/tools/markup), [eBay fees and profit](https://sharpest.ai/tools/ebay-fees).

## Questions

### How do I calculate profit margin?

Subtract the cost from the selling price and divide by the selling price. Sell for $100 an item that cost $60 and the margin is 40%.

### What price do I need for a 40% margin?

Divide the cost by one minus the margin: a $60 item needs a price of 60 ÷ 0.6 = $100. Adding 40% to the cost gives only $84, a 28.6% margin, which is the most common pricing mistake.

### What is a good profit margin?

It depends on the trade. Grocery stores run on gross margins near 25%, electronics retail on 20–30%, and clothing and accessories often 50% or more. Small online sellers usually need 30% or more to cover fees, returns and shipping.

### Is gross margin the same as net margin?

No. Gross margin only takes off what the goods cost. Net margin also takes off fees, shipping, advertising, rent and taxes, so it is always lower.

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As of 2026-11-12. Canonical page: https://sharpest.ai/tools/margin