Profit Margin Calculator

What this tool does

The three numbers every operator should know cold

This calculator turns your cost, selling price, and overhead into the three margin numbers that drive every operating decision: gross profit (dollars per unit), margin (percentage), and markup (multiplier vs cost). Plug in any two values and the third resolves automatically.

How to use it

Three inputs, three outputs

1. 1

   Enter your cost per unit. Include landed cost, not just supplier price (freight, duties, packaging).

2. 2

   Enter your selling price. The calculator works with retail price, wholesale price, or any tier you want to model.

3. 3

   Add overhead per order if you want true contribution margin. Skip this for gross margin only.

4. 4

   Read your gross profit, margin percentage, and markup multiplier. Use any of the three when negotiating with suppliers, setting tiers, or qualifying a deal.

Merchant tips

How merchants actually use these numbers

• ★

  Margin and markup are NOT the same. A 50% markup is only a 33% margin. Mixing them up is the most common mistake in pricing meetings.

• ★

  Track gross margin in dollars, not just percentage. A high-margin item with low volume often loses to a lower-margin item with much higher volume.

• ★

  Add packaging, payment processing, and a fulfillment allocation to overhead before declaring a product profitable. Many products that look good at gross margin lose money at contribution margin.

• ★

  Carrier address-correction fees ($25.50 from FedEx, up to $25 from UPS) silently eat margin on every bad-address order. Run the Bad-Address ROI Calculator to size the leak for your store.

When to use this

Three scenarios this calculator settles in seconds

What you get out

Margin, markup, and gross profit, plus a ratio readout

Three numbers, formatted for fast reading. The calculator highlights margin in percent, markup as a multiplier (so a 2x markup is obvious), and gross profit in dollars. Use whichever your team uses to talk about pricing.