📊 DropCalc.app
⚡ Free · No signup · Instant results

The dropshipper's favorite calculator

Calculate real margin, minimum ROAS and break-even. Compare products. Project profits. Decide with data.

Start calculating ↓ Compare products →
📊
Pro calculator
8 variables: tax, fees, returns, CPA…
🆚
A/B comparator
Compare 2 products side by side and pick the winner
📈
Monthly projection
Calculate profits based on sales/day
🔗
Save & share
Save scenarios and send links to your team

Margin calculator

Fill in the fields and see results in real time.

📥 Product data

Results update automatically.

💰 Net profit per sale —
$0.00
after all costs
📊 Profit margin
0%
🎯 Break-even ROAS
0x
Below this ROAS, you lose money
⚠️ Maximum allowed CPA
$0.00
Paying more per acquisition = loss
🧾 Per-sale breakdown
Gross revenue—
− Tax / VAT—
− Product cost—
− Shipping—
− Fees—
− Ad spend (CPA)—
− Returns (provision)—
= Net profit—

📈 Profit projection

How much will you make monthly? Enter your sales/day and see.

Monthly revenue
$0.00
—
Monthly ad spend
$0.00
—
Monthly net profit
$0.00
—
📅 Annual projection
$0.00
🎯 Break-even point
— sales
Sales needed to cover fixed costs

🆚 A/B product comparator

Torn between 2 products? Compare them side by side and pick the winner.

A
—
Profit$0.00
Margin0%
Min ROAS0x
B
—
Profit$0.00
Margin0%
Min ROAS0x
🏆 Winner
—
Fill in the data to compare

📖 How to calculate real dropshipping margin (complete guide)

If you run a dropshipping or Shopify store, calculating your real margin before launching a product is the difference between making money and losing it. Most beginners get it wrong because they only subtract product cost from selling price, ignoring 8 hidden costs that eat your profit.

The 8 costs you must subtract from selling price

  1. Product cost: what you pay your supplier (AliExpress, CJ Dropshipping, Spocket, local supplier).
  2. Shipping cost: what you pay, not what you charge the customer.
  3. Payment processor fee: Stripe ~2.9% + $0.30, PayPal ~3.49% + $0.49.
  4. Platform fee: Shopify charges 2% if you don't use Shopify Payments. WooCommerce 0%.
  5. Sales tax / VAT: US sales tax varies by state. EU VAT 19-25%. Outside-EU B2C sometimes exempt.
  6. CPA (Cost per Acquisition): what it costs to acquire a customer via Meta, TikTok, Google Ads or influencers.
  7. Returns: 3% to 8% in dropshipping. Must be provisioned.
  8. Operating costs: Shopify ($29-79/mo), apps, domain, AI tools, accountant, etc.

What margin is profitable in dropshipping?

How to calculate minimum ROAS

Minimum ROAS (Return on Ad Spend) = 1 / gross margin. If your gross margin (excluding ads) is 40%, your minimum ROAS is 1/0.40 = 2.5x. Below that, you lose money.

How to use DropCalc to its full potential

  1. Calculator: enter your candidate product and see if the numbers work.
  2. A/B Comparator: torn between 2 products? Put both in and let DropCalc tell you which has the better margin.
  3. Projection: estimate realistic sales/day and see monthly and annual profit.
  4. Save: store your best scenarios to come back later.
  5. Share: send links to your partner or team with the data pre-filled.

Common margin calculation mistakes

❓ Frequently Asked Questions

How do I calculate real margin in dropshipping?

Subtract from selling price: product cost, shipping, payment and platform fees, tax/VAT, advertising CPA and a returns provision. The result is your net profit. Divide by selling price to get the percentage margin.

What minimum ROAS do I need to be profitable?

It depends on your gross margin. The formula is 1 / gross margin. 30% margin → minimum ROAS 3.33x. 50% margin → minimum ROAS 2x. DropCalc shows it automatically.

Is DropCalc free?

Yes, 100% free, no signup, no limits. The site is funded by non-intrusive ads.

Does it work for Shopify, WooCommerce and other platforms?

Yes. Just change the "Platform fee" field accordingly: Shopify 2% (without Shopify Payments) or 0%, WooCommerce 0%, BigCommerce variable, etc.

Do you store my data?

No. All calculations happen in your browser. "Saved scenarios" are stored locally on your device (localStorage). Nothing is sent to any server.

Can I share my calculations with someone else?

Yes. Click "🔗 Share" and a link with all your data is copied to clipboard. Whoever opens it will see your scenario pre-filled.

Is there a Spanish version?

Yes: dropcalc.app. Same calculator with EUR and Spanish-market terminology.