Know the numbers that move your margin.
Quick calculators for ad profit leaks, dead stock, stockouts, and true net margin. Get your answer in a minute, then get back to running your store.
- 17 free calculators
- Answers in under 60 seconds
- Your numbers never leave your browser
- One email unlocks everything
Popular tools
Start with the big leaks
- Ads & profit
Ad Profit Leak Score
How much of your Google Ads spend is actually profitable, banded 0–100.
- General
Shopify Profit Margin Calculator
Your real net margin after COGS, shipping, fees, and ad spend.
- Inventory
Dead Stock Carrying Cost Calculator
What stock unsold 90+ days is actually costing you every month.
- Inventory
Stockout Revenue Loss Estimator
The revenue and profit a stockout costs you, based on normal daily sales.
- Inventory
Reorder Point Calculator
The exact stock level that should trigger your next reorder.
- Ads & profit
Discount Code Profit Impact Calculator
Your real margin after a discount code, and the volume needed to break even.
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Go further
Want these numbers tracked automatically?
The calculators give you a snapshot. These apps keep watching the same numbers every day, so you don't have to re-run them.
Selvra OS
Google Ads profit tracking
See which Google Ads campaigns actually make money, measured on real profit (POAS), not just revenue.
- Profit on ad spend for every campaign
- Flags unprofitable spend automatically
- Built for Shopify stores
Verve AI
AI inventory forecasting
Forecast demand and know exactly when to reorder, before you stock out or tie cash up in overstock.
- Demand forecasts per product
- Reorder points worked out for you
- Dead stock flagged early
How it works
Three steps, about a minute
- Step 1
Pick a tool
Each calculator answers one specific question — no dashboards, no setup, no account.
- Step 2
Enter your numbers
Every calculation runs in your browser. Your revenue, costs, and stock levels are never sent anywhere.
- Step 3
Unlock every result
Drop your email once and every tool on the site is unlocked for good. No login, ever.
Find the leak in your margin
17 free calculators, no account, no spreadsheet. Pick one and get your answer in under a minute.
Browse free tools