COGS Calculator

Cost of goods sold is the direct cost of producing the products a business sold during a period — the materials, labor, and overhead that went specifically into the units that were actually sold (not the ones still sitting in inventory). COGS is subtracted from revenue to calculate gross profit, which is why it sits at the top of the income statement. A business with $500,000 in revenue and $200,000 in COGS has a $300,000 gross profit and a 60% gross margin. COGS does not include selling expenses, marketing, or general and administrative costs — those appear further down the income statement.

The inventory method formula is: Beginning Inventory + Purchases During Period − Ending Inventory = COGS. It works because the units available for sale (beginning inventory plus new purchases) minus what is still on hand at period end must equal what was sold. If a business starts January with $10,000 in inventory, buys $25,000 in goods, and finishes January with $8,000 remaining, the $27,000 difference is the cost of the goods that left the shelf and generated revenue. Most small businesses use this method because it ties directly to the inventory accounts they already track.

The direct method adds up the three categories of production cost — direct materials (raw inputs that become the product), direct labor (wages for workers who physically make the product), and manufacturing overhead (factory rent, equipment depreciation, utilities allocated to production). This method is standard for manufacturing businesses and any company that makes what it sells rather than reselling purchased goods. Service businesses generally do not calculate COGS at all because their costs are predominantly labor without inventory, though some use a "cost of revenue" line that serves the same gross-profit-calculation purpose.

Gross profit margin is the percentage of revenue remaining after subtracting COGS: (Revenue − COGS) ÷ Revenue × 100. A 60% gross margin means 60 cents of every dollar in revenue is available to cover operating expenses and generate net profit. COGS is the primary driver because it is subtracted first — a 5% increase in material costs on a 40% gross-margin business drops gross margin to about 35%, which can make a profitable business unprofitable at the operating level without any change in overhead. Industry benchmarks vary widely: SaaS companies often run 70-80%+ gross margins, retail runs 20-40%, and food service frequently runs 30-40%.

COGS covers only the direct costs of producing goods sold — materials, production labor, manufacturing overhead. Operating expenses cover everything else required to run the business: rent (for non-production space), marketing, sales commissions, software, accounting, insurance, and general administrative costs. The income statement separates them because gross margin (Revenue minus COGS) is a different business metric than operating margin (Revenue minus COGS minus operating expenses). A business can have a healthy 65% gross margin and still lose money at the operating level if overhead is high. The separation makes it easier to see exactly where margin is being consumed.

Yes — the optional revenue field in this calculator unlocks the gross profit and gross margin calculations. Enter the total revenue for the same period as your COGS inputs and the calculator will show gross profit (Revenue − COGS), gross margin percentage, and a visual breakdown of how much of each revenue dollar went to cost versus profit. This is most useful when you are doing period-end analysis rather than prospective product pricing — for product-level margin math, the profit margin calculator handles the per-unit perspective.