Business Calculators
Free financial calculators built for entrepreneurs, founders, and operators. Whether you're evaluating a new product, pricing a service, modeling cash runway, assessing acquisition costs, or preparing for a business sale — our 10-calculator suite covers every core metric. Start with the Profit Margin Calculator, visualize your funding timeline with the Startup Runway Calculator, or use the Break-Even Calculator to find your minimum viable sales volume.
Profit Margin Calculator
Calculate gross profit margin, operating margin, and net profit margin. Enter revenue, COGS, and operating expenses to see a full three-level margin breakdown.
Inputs
- • Revenue
- • Cost of Goods Sold
- • Operating Expenses
- • Taxes & Interest
Outputs
- • Gross margin %
- • Operating margin %
- • Net margin %
- • Full P&L breakdown
Markup Calculator
Calculate markup percentage from cost and selling price, or find the selling price from a target markup. Instantly see the critical difference between markup and profit margin.
Inputs
- • Cost price
- • Selling price (or target markup %)
Outputs
- • Markup %
- • Profit margin %
- • Profit per unit
Break-Even Calculator
Find the exact number of units and revenue needed to cover all costs. Set an optional profit target to see how many sales you need to hit it.
Inputs
- • Fixed costs
- • Variable cost per unit
- • Selling price
- • Profit target (optional)
Outputs
- • Break-even units
- • Break-even revenue
- • Contribution margin
- • Units to hit profit target
ROI Calculator
Calculate return on investment percentage for any investment. Add a time period to calculate annualized ROI (CAGR) for comparing investments over different horizons.
Inputs
- • Initial investment
- • Final value / return
- • Time period (optional)
Outputs
- • ROI %
- • Annualized ROI / CAGR
- • Net profit
- • Rule of 72 estimate
Unit Economics Calculator
Calculate customer LTV, LTV:CAC ratio, and CAC payback period for subscription and recurring revenue businesses. Evaluate whether your acquisition economics are sustainable.
Inputs
- • CAC
- • Monthly ARPU
- • Gross margin %
- • Monthly churn rate %
Outputs
- • Customer LTV
- • LTV:CAC ratio
- • CAC payback period
- • Average customer lifetime
Business Valuation Calculator
Estimate your business value using three methods: revenue multiple, EBITDA multiple, and asset-based book value. Get a valuation range for selling, fundraising, or planning.
Inputs
- • Annual revenue
- • EBITDA
- • Revenue/EBITDA multiples
- • Assets & liabilities
Outputs
- • Revenue-based value
- • EBITDA-based value
- • Book value
- • Valuation range
Startup Runway Calculator
Visualize your cash runway as an interactive chart. Model monthly burn rate, revenue growth, and find your fundraising deadline — know exactly when you need to raise before you run out of cash.
Inputs
- • Starting cash
- • Monthly expenses
- • Monthly revenue
- • MoM revenue growth %
Outputs
- • Months of runway
- • Out-of-cash date
- • Fundraise-by date
- • Cash balance chart
Cost Per Acquisition (CPA) Calculator
Calculate your cost per acquisition and compare it against maximum profitable CPA. Enter ad spend, conversions, and optional LTV to instantly see if your acquisition economics are sustainable.
Inputs
- • Ad spend
- • Conversions
- • Customer LTV
- • Gross margin %
- • Target ROAS
Outputs
- • CPA
- • Max profitable CPA
- • ROAS
- • Profit per conversion
- • Status indicator
Customer LTV Calculator
Calculate customer lifetime value for subscription or ecommerce businesses with an interactive cumulative gross profit chart. See exactly when customers pay back their acquisition cost.
Inputs
- • ARPU / AOV
- • Purchase frequency
- • Gross margin %
- • Churn rate / Lifespan
- • CAC
Outputs
- • Customer LTV
- • CAC payback month
- • LTV:CAC ratio
- • Cumulative profit curve
SaaS MRR Calculator
Calculate MRR, ARR, and ARPA across up to four pricing tiers. Model MRR movements — new, expansion, and churned MRR — to get net new MRR, churn rate, and net revenue retention.
Inputs
- • Plan tiers (price + subscribers)
- • New MRR
- • Expansion MRR
- • Churned MRR
Outputs
- • MRR
- • ARR
- • ARPA
- • Net new MRR
- • MRR churn rate
- • Net revenue retention
How to Use the Business Calculator Suite
Sound business decisions require modeling multiple financial dimensions. Our calculator suite is designed to work together as a complete financial analysis workflow:
- Start with Profit Margin — understand what percentage of revenue you keep after COGS and operating costs.
- Verify Pricing with Markup — confirm your pricing strategy generates the margin you need, and understand markup vs. margin.
- Find Break-Even Volume — calculate the minimum sales needed to cover all costs before turning a profit.
- Evaluate Capital with ROI — assess whether your investment in inventory, marketing, or equipment earns adequate return.
- Check Cash Runway — use the Startup Runway Calculator to know exactly how many months of cash you have and when to fundraise.
- Audit Acquisition Costs — use the CPA Calculator to verify your cost per acquisition stays below your maximum profitable threshold.
- Model Customer LTV — use the LTV Calculator to see cumulative gross profit over a customer's lifetime and find your CAC payback month.
- Track SaaS Revenue — use the MRR Calculator to break down monthly recurring revenue by tier and measure net revenue retention.
- Model Unit Economics — use the Unit Economics Calculator to ensure LTV:CAC justifies acquisition spend before scaling.
- Value the Business — use the Business Valuation Calculator for fundraising, exit planning, or partner buyouts.
All calculators are free, require no login, and work on any device. Bookmark this page as your go-to hub for business financial analysis.
Core Business Metrics Explained
Gross Margin vs. Net Margin
Gross margin subtracts only the cost of goods sold (COGS) — the direct cost to produce or acquire what you sell. Net margin subtracts everything: COGS, operating expenses (rent, salaries, software), interest, and taxes. Gross margin shows production efficiency. Net margin shows overall business profitability — what you actually keep.
Contribution Margin & Break-Even
Contribution margin = Selling Price − Variable Cost per Unit. It's what each sale contributes toward covering your fixed costs. Once fixed costs are covered (break-even), that same amount becomes pure profit per unit. A business with a low contribution margin needs very high volume to survive — and is fragile when sales slow.
LTV:CAC — The Subscription Business Health Signal
LTV (Customer Lifetime Value) divided by CAC (Customer Acquisition Cost) is the single most important metric for subscription and recurring revenue businesses. A ratio of 3:1 or higher is the investor benchmark for healthy unit economics. Below 1:1 means you're destroying value with every customer you acquire, regardless of top-line growth.
Business Valuation Multiples
Most private business acquisitions use EBITDA multiples: 3–5× for small businesses, 5–8× for mid-market, 10–20×+ for high-growth SaaS. Revenue multiples (1–10× ARR) are used for pre-profit or high-growth companies. Asset-based valuation (book value) is used for asset-heavy or distressed businesses. True value also depends on growth trajectory, customer diversification, recurring revenue, and management independence from the founder.
Platform-Specific Calculators
Selling on Amazon, Shopify, or Etsy? Our platform-specific calculator suites model the exact fees, margins, and ROI for each platform.