Free Biz Tools
20 free calculators for small business owners and entrepreneurs — margins, break-even, loans, invoices, and more. Browser-based, private, no sign-up.
Profit Margin Calculator
Gross, operating, and net margin from your revenue and costs. Includes markup comparison.
Open tool →Break-Even Calculator
Find how many units or how much revenue you need to start making money.
Open tool →Markup vs Margin
Convert between markup and margin instantly with a quick reference table.
Open tool →Sales Tax Calculator
Add tax to a price or extract tax from a total. Simple and instant.
Open tool →Discount Calculator
Calculate sale price after discount or find the percentage off between two prices.
Open tool →Business Loan Calculator
Monthly payment, total interest, and term comparison for business loans.
Open tool →ROI Calculator
Return on investment for any project with payback period and annualized return.
Open tool →Startup Cost Estimator
One-time and recurring costs with runway calculation and 15% buffer.
Open tool →Cash Flow Forecaster
12-month cash flow projection with revenue growth modeling.
Open tool →Compound Growth
Project revenue over 12, 24, or 36 months at any growth rate.
Open tool →Business Valuation
Estimate value using revenue and earnings multiples by industry.
Open tool →Hourly Rate Calculator
What should you charge? Based on target income, expenses, and billable hours.
Open tool →Project Price Calculator
Build flat-rate quotes from hours, complexity, rush fees, and expenses.
Open tool →Invoice Generator
Create professional invoices with line items, tax, and payment terms.
Open tool →Quote Generator
Create professional quotes and estimates with validity dates and terms.
Open tool →Employee Cost Calculator
True cost of hiring: salary, FICA, benefits, PTO, overhead.
Open tool →Customer Acquisition Cost
How much does it cost to acquire a customer? See CAC with LTV ratio.
Open tool →Customer Lifetime Value
How much is each customer worth over time? LTV:CAC ratio included.
Open tool →Inventory Turnover
How fast you sell through stock. Turnover ratio and days to sell.
Open tool →Tip Calculator
Calculate tip amount and split the bill. Suggested tips at every level.
Open tool →How It Works
Choose a Tool
Pick the calculator that matches your business question.
Enter Your Numbers
Input revenue, costs, or project details.
Get Instant Results
See detailed breakdowns and actionable insights.
Frequently Asked Questions
Free Business Calculators & Tools
Free Biz Tools is a collection of 10 free, browser-based calculators for small business owners and entrepreneurs. Every tool is private, instant, and requires no account.
Pricing & Profitability
Calculate profit margins at every level, find your break-even point, convert between markup and margin, and compute sales tax on any transaction.
Finance & Planning
Estimate business loan payments, calculate ROI on any project, plan your startup costs with runway projections, and forecast 12 months of cash flow.