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Both calculators run independently — change the inputs on either side to compare results.

ROI Calculator

Calculate simple return on investment (ROI) as the percentage gain or loss from a marketing campaign, inventory bet, or business investment relative to its cost. Use it for the foundational "did this make money?" check on any discrete ecommerce investment — marketing campaigns, inventory purchases, equipment, software, hires.

Initial Investment ($)

Total Returns ($)

Fill in the required fields to see your result.

Ecommerce

Profit Margin Calculator

Calculate the gross profit margin — the percentage of every sales dollar that remains after paying for the goods sold. Use it to set product prices, evaluate deals, and benchmark against industry margin targets.

Cost Price ($)

Selling Price ($)

Fill in the required fields to see your result.

Key differences

	ROI Calculator	Profit Margin Calculator
Category	Ecommerce	Ecommerce
Inputs required	2	2
Result	Return on Investment (%)	Profit Margin (%)
What it does	Calculate simple return on investment (ROI) as the percentage gain or loss from a marketing campaign, inventory bet, or business investment relative to its cost. Use it for the foundational "did this make money?" check on any discrete ecommerce investment — marketing campaigns, inventory purchases, equipment, software, hires.	Calculate the gross profit margin — the percentage of every sales dollar that remains after paying for the goods sold. Use it to set product prices, evaluate deals, and benchmark against industry margin targets.