Free browser-based calculators
Practical small business calculators for pricing, fees, taxes, and cash flow.
BayMaxHome Business Tools helps freelancers, ecommerce sellers, and small business owners make faster estimates without uploading private data to a server.
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Each tool includes a formula, example scenario, and related calculators so the page is useful beyond a single result.
Pricing
Pricing tools
Fast calculators for common small business decisions.
Pricing
Profit Margin Calculator
Calculate gross profit, profit margin, markup, and break-even revenue for a product, service, or order. PricingMarkup Calculator
Convert product cost and markup percentage into selling price, profit, and margin. PricingMargin vs Markup Calculator
Compare margin-based pricing and markup-based pricing so you do not confuse the two. PricingDiscount Calculator
Calculate sale price, discount savings, and the final customer price after a promotion. PricingCost Plus Pricing Calculator
Build a selling price from unit cost, overhead, and markup for simple small business pricing. PricingGross Margin Calculator
Calculate gross margin from revenue and cost of goods sold. PricingNet Profit Margin Calculator
Calculate net profit margin after operating expenses. PricingTarget Profit Price Calculator
Find the selling price needed to hit a target profit per unit.Taxes and Fees
Taxes and Fees tools
Fast calculators for common small business decisions.
Taxes
Sales Tax Calculator
Estimate US sales tax and final total from a pre-tax amount and tax rate. TaxesVAT Calculator
Calculate VAT from net or gross amounts for invoices, quotes, and international pricing estimates. FeesPayPal Fee Calculator
Estimate PayPal transaction fees, net received, and the gross amount required to receive a target payment. FeesStripe Fee Calculator
Estimate Stripe payment processing fees, net revenue, and gross-up amount. FeesMarketplace Fee Calculator
Estimate marketplace fees, ads, refunds, shipping, packaging, and true seller profit for marketplace orders. FeesShipping Margin Calculator
Estimate profit after shipping charged and shipping cost.Freelance
Freelance tools
Fast calculators for common small business decisions.
Freelance
Freelance Hourly Rate Calculator
Set a sustainable hourly rate from income goals, benefits, taxes, billable utilization, and risk buffer. FreelanceProject Rate Calculator
Estimate a fixed project price from expected hours, hourly rate, and delivery buffer. FreelanceBillable Hours Calculator
Estimate billable time, non-billable time, and revenue from utilization and hourly rate. FreelanceRetainer Fee Calculator
Price monthly service retainers from expected hours, hourly value, and retainer discount.Finance and Planning
Finance and Planning tools
Fast calculators for common small business decisions.
Planning
Break-even Calculator
Estimate how many units you need to sell before a product, service, or campaign covers its fixed costs. PlanningContribution Margin Calculator
Measure contribution per unit, contribution margin ratio, and total contribution after variable costs. FinanceROI Calculator
Calculate net gain, return on investment, and return multiple for business projects. FinanceLoan Payment Calculator
Estimate monthly payment, extra payment payoff speed, interest saved, and loan fees. FinanceCash Flow Calculator
Build a 12-month cash flow forecast with ending cash, lowest balance, and runway risk. PlanningStartup Cost Calculator
Estimate launch budget, monthly burn, runway reserve, and contingency funding. FinanceCustomer Acquisition Cost Calculator
Calculate CAC from marketing spend and new customers. FinanceCustomer LTV Calculator
Estimate customer lifetime value from order value, frequency, margin, and lifespan. FinanceCAC Payback Calculator
Estimate how many months it takes to recover customer acquisition cost. FinanceMRR Calculator
Calculate monthly recurring revenue from customers and average revenue per account. FinanceChurn Rate Calculator
Calculate customer churn rate and retained customers. PlanningBurn Rate and Runway Calculator
Estimate monthly burn rate and runway from cash and expenses. PlanningInventory Turnover Calculator
Estimate inventory turnover and days inventory outstanding. PlanningEmployee Cost Calculator
Estimate fully loaded employee cost from salary, benefits, tax, and overhead.Documents
Documents tools
Fast calculators for common small business decisions.
Learning center
Guides for small business decisions
Short explainers that connect formulas to real pricing, fee, tax, and planning decisions.
Guide