How this calculator works
Profit margin shows how much revenue remains after costs. This version uses revenue and cost instead of requiring you to enter profit manually, making it more practical for business owners and product sellers.
Profit = revenue − cost
Profit margin = profit ÷ revenue
Profit margin = profit ÷ revenue
Use the same period for revenue and cost. Monthly revenue should be compared with monthly cost, not annual cost.
How to use this calculator
- Enter realistic values that match your current situation.
- Press Calculate to refresh the estimate.
- Compare the main result with the supporting details in the result panel.
- Change one input at a time to see which variable affects the result most.
Planning note: Profit Margin Calculator gives an educational estimate. It does not include every tax rule, fee, platform policy, market condition, or personal constraint, so use it as a quick planning reference rather than a final decision.
FAQ
How do you calculate profit margin?
Subtract cost from revenue, then divide profit by revenue.
What is a good profit margin?
It depends on industry, but higher margins give more room for overhead and reinvestment.
Why use revenue and cost?
Most business owners know revenue and cost first. Profit can be calculated automatically.
Can profit margin be negative?
Yes. If cost is higher than revenue, the margin is negative.
Is profit margin the same as markup?
No. Profit margin uses revenue as the denominator, while markup uses cost.