Calculate Percentage Profit, Loss, and ROI — Business Math Made Simple

You bought for $50, sold for $75. Your profit percentage is 50%. Your profit margin is 33.3%. Same transaction, different formulas, different numbers. Use the percentage calculator for instant results — or learn the formulas below.

The Four Business Percentage Formulas

What	Formula	Example ($50 cost, $75 sale)	Result
Profit %	(Profit / Cost) x 100	($25 / $50) x 100	50%
Loss %	(Loss / Cost) x 100	If sold at $40: ($10 / $50) x 100	20% loss
Margin %	(Profit / Selling Price) x 100	($25 / $75) x 100	33.3%
Markup %	(Profit / Cost) x 100	($25 / $50) x 100	50%
ROI %	(Return - Investment) / Investment x 100	($75 - $50) / $50 x 100	50%

Key insight: Profit percentage and markup percentage use the same formula — profit divided by cost. Margin uses profit divided by selling price. This is why markup is always a higher number than margin for the same transaction.

Profit Margin by Industry — What Is "Good"?

Industry	Typical Gross Margin	Typical Net Margin	Notes
Software / SaaS	70-90%	15-25%	Low cost of goods, high R&D spend
E-commerce	40-60%	5-15%	Depends heavily on product category
Retail (physical)	25-50%	2-5%	High overhead (rent, staff, inventory)
Restaurants	60-70% (food cost 30-40%)	3-9%	Thin net margins, high labor costs
Manufacturing	20-40%	5-15%	Capital-intensive, economies of scale
Consulting / Services	50-80%	15-30%	Low COGS, high labor utilization
Construction	15-25%	2-7%	Tight margins, competitive bidding
Real Estate	~varies	10-20%	Long cycles, capital-intensive

ROI Examples for Common Business Investments

Investment	Spend	Return	ROI	Verdict
Google Ads campaign	$5,000	$18,000 revenue	260%	Strong — typical good campaign
New employee hire	$60,000/yr salary	$200,000/yr revenue generated	233%	Solid ROI after ramp-up
Website redesign	$15,000	$45,000 additional annual revenue	200%	Good — pays for itself in 4 months
Trade show booth	$8,000	$12,000 in leads (closed)	50%	Marginal — depends on lead quality
Social media ads	$2,000	$3,500 revenue	75%	OK for brand awareness, weak for direct ROI
Email marketing	$500/mo	$8,000/mo revenue	1,500%	Highest ROI marketing channel consistently

Common Profit Calculation Mistakes

• Confusing margin with markup: A 50% markup on $100 cost = $150 selling price. A 50% margin on $150 selling price = $75 profit (which is the same $150 price). Same sale, same profit, but "50% margin" and "50% markup" describe different things
• Forgetting hidden costs: Profit percentage should include ALL costs — not just product cost. Shipping, returns, payment processing fees (2.9% for Stripe/PayPal), packaging, and labor all reduce real profit
• Gross vs net confusion: Gross profit ignores overhead (rent, salaries, utilities). Net profit includes everything. A business can have 60% gross margin and 5% net margin — which means 55% goes to operating expenses
• Percentage gain vs loss asymmetry: A 50% loss requires a 100% gain to break even. If a $100 stock drops 50% to $50, it needs to double (100% gain) to get back to $100. This is why avoiding losses matters more than chasing gains

Related Calculators

• Percentage Calculator — instant profit, loss, and margin math
• Discount Calculator — calculate sale prices and discount percentages
• Compound Interest Calculator — investment growth over time
• Salary Calculator — labor cost calculations
• Tip Calculator — service industry percentages
• Mortgage Calculator — real estate investment math