Check unit economics before changing price
Use margin, markup, discount, and contribution tools together so a promotion does not look attractive on revenue while quietly erasing profit.
16 tools
Business calculators for pricing, margins, inventory, and growth
Use these tools to price products, check margins, estimate break-even volume, and plan inventory with numbers you can verify quickly.
Pricing and margin planningInventory and demand managementConversion and order economics
Practical guide
How to use these business tools
Business calculators are most useful when they turn a rough commercial question into a small model you can challenge. Start with the metric that controls the decision, then compare a conservative case with a more optimistic case before changing price, spend, or stock levels.
Translate fixed costs into a sales target
Break-even and ROI tools help convert launch spend, software costs, or campaign budgets into the volume or gain required to justify the decision.
Keep inventory planning tied to demand
Inventory and demand calculators are best used with realistic sales velocity, lead times, and reorder buffers rather than a single optimistic forecast.
Before you rely on a result
- Use contribution profit, not headline revenue, when a formula asks for gain.
- Include channel fees, refunds, freight, and payment costs when they materially affect margin.
- Compare multiple scenarios before committing to a pricing or purchasing decision.
Common mistakes to avoid
- Treating markup and margin as interchangeable percentages.
- Using one average order value when customer segments have very different economics.
- Ignoring payback time when two options show similar ROI.
Tool library
Choose a calculator or utility
ROI Calculator
Estimate return on investment from a projected gain and the cost required to generate it.
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Break-Even Calculator
Calculate how many units you need to sell to cover fixed costs at a given price and variable cost per unit.
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Gross Margin Calculator
Work out gross margin from revenue and direct cost of goods or delivery costs.
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Markup Calculator
Calculate markup percentage from cost and selling price to check whether pricing covers margin targets.
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Discount Calculator
Find the discount percentage, savings amount, and final price from an original price and sale price.
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Profit Margin Calculator
Measure profit margin from revenue and total costs to see how much of each sales dollar is left as profit.
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Contribution Margin Calculator
Calculate contribution margin per unit to see how much each sale contributes toward fixed costs and profit.
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Revenue Growth Calculator
Calculate the percentage change between a previous revenue figure and the current one.
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Sales Commission Calculator
Calculate commission earnings from total sales, commission rate, and optional base pay.
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Average Order Value Calculator
Calculate average order value from total revenue and total orders.
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Average Selling Price Calculator
Measure the average selling price per unit from total revenue and units sold.
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Conversion Rate Calculator
Calculate conversion rate from total visitors or leads and the number of completed conversions.
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Inventory Turnover Calculator
Measure how often inventory is sold and replenished over a period using cost of goods sold and average inventory.
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Reorder Point Calculator
Estimate the inventory level that should trigger a new purchase order based on demand, lead time, and safety stock.
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Safety Stock Calculator
Estimate a buffer inventory level using average and maximum demand alongside average and maximum lead time.
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Economic Order Quantity Calculator
Estimate the order quantity that balances ordering costs against annual holding costs.
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