Business Calculators With Transparent Formulas
Practical calculators for business decisions, built for owners, operators, founders, analysts, and teams. Each tool runs the calculation in your browser and shows the formula, assumptions, worked example, and result interpretation behind the number.
- Free to use
- No account required
- Transparent formulas
- Calculator inputs stay in your browser
Featured Calculators
A curated starting point across inventory, workforce, SaaS, and profitability decisions.
Customer Lifetime Value (CLV/LTV) Calculator
Estimate customer lifetime value (CLV/LTV) from subscription revenue and churn or from transactional order value, purchase frequency, and lifespan, with an optional portfolio-wide value estimate.
Profit Margin Calculator
Calculate profit and profit margin from revenue and total cost, with cost share and support for negative results.
Gross Margin Calculator
Calculate gross profit and gross margin, also called gross profit margin, from revenue and cost of goods sold (COGS).
Inventory Carrying Cost Calculator
Estimate the annual and monthly cost of holding your inventory, from a quick percentage or a full cost build-up.
Reorder Point Calculator
Calculate when to reorder stock with a known safety stock, an Average-Max buffer, or a service-level statistical buffer — no separate safety-stock calculation required first.
Employee Turnover Cost Calculator
Estimate how many employees are likely to leave this year and what that turnover costs, from a quick percentage or a full advanced cost build-up.
More calculators
Browse by decision area
Select a cluster of tools designed to optimize operational efficiency and business costs.
Inventory & Operations
Calculators for the cost of holding, moving, and managing physical inventory and day-to-day operations.
4 calculators
Workforce Costs
Calculators for the cost of hiring, retaining, and losing employees.
1 calculator
SaaS & Customer Economics
Calculators for customer acquisition, retention, and subscription business economics.
3 calculators
Business Costs & Profitability
Calculators for general business cost, decision, and profitability models.
3 calculators
Formula Guides
Read the formula, components, and a worked example behind the numbers.
Customer Lifetime Value Formula: How to Calculate CLV
The CLV/LTV formula explained in plain terms: the simple revenue model, the gross-margin adjustment, and the churn-based shortcut for subscription businesses, each with a worked example.
Inventory Carrying Cost Formula: Components and Example
The inventory carrying cost formula explained in plain English: the nine cost components, dollars vs. rate, and a complete worked example.
Employee Turnover Cost: Formula, Components, and Example
The employee turnover cost formula explained in plain English: quick estimate vs. component build-up, the six cost drivers, and a complete worked example.
LTV:CAC Ratio Explained: Formula, Example, and Interpretation
How the LTV:CAC ratio is calculated, a full worked example, and what the ratio does and does not tell you about a customer relationship.
How Business Math Lab works
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Input
Enter your assumptions
Use your own costs, volumes, rates, time periods, and units.
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Formula
See the formula
Review the arithmetic, variable meanings, and model limits.
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Interpretation
Interpret the result
Compare the output with assumptions, examples, and related tools.
Methodology and trust
Created and maintained by Ivan Daniel using documented methodology and editorial standards.