Cost of Goods Sold (COGS) Calculator
Know the real cost behind every sale in seconds. Enter three numbers—Beginning Inventory, Purchases, Ending Inventory—and the calculator reveals your COGS instantly. No spreadsheets, no guesswork.

How It Works
The tool applies the standard cost of goods sold formula:
COGS = Opening Inventory + Purchases – Closing Inventory
The answer appears instantly, along with a simple chart that compares COGS to revenue so you can spot margin squeeze at a glance.
Why COGS Matters
- Tax savings. COGS is a tax-deductible expense. Recording it right lowers your taxable profit.Â
- True profit picture. Subtract COGS from revenue to see gross profit. If margins look thin, you know where to act fast.Â
- Pricing insight. Rising COGS without a matching price-rise signals shrinking margins.Â
Example CalculationÂ
Scenario: A coffee roaster starts the quarter with $15,000 of green beans on hand. They buy another $40,000 during the quarter and finish with $12,000 left.Â
COGS = 15,000 + 40,000 – 12,000 = $43,000Â
If sales were $75,000, gross profit equals $32,000 and gross margin is 42.7 %.Â
How Bookkeeping at Orbit Accountants Works?
Five Ways to Lower COGS
- Negotiate supplier rates. Even 2 % off materials lifts margins.
- Buy in economic order quantities. Reduces carry costs.
- Track waste. Small scraps add up fast.
- Automate stock counts. Less human error, tighter numbers.
- Review pricing quarterly. Pass unavoidable cost hikes to the market promptly.