Retail Markup Calculator

Markup and margin describe the same dollar of profit from two different ends, and mixing them up is the most expensive arithmetic mistake in retail. Aim for a 50% margin on a $40 cost and the price is $80. Apply a 50% markup instead and you charge $60, a quarter under where you meant to be, on every unit, for as long as the line is on the shelf.

Markup formula (cost-based):

Selling Price = Cost × (1 + Markup Percentage / 100)

Markup % = ((Selling Price − Cost) / Cost) × 100

Gross Margin formula (revenue-based):

Gross Margin % = ((Selling Price − Cost) / Selling Price) × 100

Relationship between markup and margin, both written as decimals rather than percentages:

Margin = Markup / (1 + Markup)

Markup = Margin / (1 − Margin)

The decimals matter. A 75% markup is 0.75 in that first formula, giving 0.75 / 1.75 = 0.4286, so a 42.9% margin. Put 75 in instead and you get 0.987, which is nonsense, and it is the single most common way people get this pair of formulas wrong.

What each variable means:

• Markup is profit as a percentage of your cost, which is the supplier’s way of looking at it
• Gross Margin is profit as a percentage of the selling price, which is the retailer’s way and the one your income statement uses
• A 50% markup is not a 50% margin. It is a 33.3% margin, and that gap costs retailers real money

Worked example: You buy a product for $40 and sell it for $70.

Markup = (($70 − $40) / $40) × 100 = 75% Gross Margin = (($70 − $40) / $70) × 100 = 42.9%

To achieve a 50% gross margin on a $40 item: Selling price = $40 / (1 − 0.50) = $80

Typical markup by retail category:

• Grocery staples: 5 to 20%
• Clothing and apparel: 100 to 200%
• Electronics: 10 to 30%
• Jewelry: 200 to 400%
• Restaurants (food): 200 to 300%
• Furniture: 200 to 400%

Those ranges look wild next to each other until you remember what each business actually sells. A grocer at 15% markup turns the same shelf twenty times a year. A furniture store at 300% might move a sofa off the floor twice. Markup and inventory turns trade against each other, and a category with a low markup is not automatically the worse business.

Where this bites on a marketplace

If you sell through Etsy, eBay, Poshmark or Amazon, the platform’s cut comes off the selling price, so it eats the margin rather than the markup. A 100% markup on a $10 item gives you $20 and a 50% margin, but 13.25% to eBay plus postage can halve that in one step. Work out the markup here, then run the real number through the calculator for whichever platform you sell on. The two answers together are the honest one.

Always compare margin rather than markup across product lines. Margin maps directly onto the gross profit percentage in your accounts; markup does not map onto anything you will ever be asked for.