Methodology
How every calculator on BusCalcTools works — formula, step-by-step calculation, primary sources, and assumptions. Each page lists the date it was last reviewed.
For the underlying editorial standards, see the editorial policy. For the public log of substantive updates, see the changelog.
Profit & Pricing
Topic hub →Profit Margin Calculator
Calculate gross and net profit margin instantly.
Markup Calculator
Convert cost price to selling price at any markup %.
Pricing Calculator
Set the optimal selling price from cost and margin.
Net Profit Calculator
Calculate true net profit after all costs and tax.
Ecommerce Profit Calculator
True profit per unit after fees, shipping and ad spend.
Discount & Sale Price Calculator
Sale price and savings from any discount %.
Break-Even & Cash Flow
Topic hub →Break-Even Calculator
Find the units and revenue needed to break even.
Cost Per Unit Calculator
Calculate production cost per unit from total costs.
Cash Flow Calculator
Project 12-month cash flow from income and expenses.
Burn Rate & Runway Calculator
Months of runway from cash on hand and monthly burn.
Invoice Calculator
Build invoice totals with tax in seconds.
Freelance & Hiring
Topic hub →Funding & Valuation
Topic hub →ROI Calculator
Calculate return on investment from any spend.
Business Loan Calculator
Calculate monthly repayments and total interest.
Payback Period Calculator
How long until an investment pays for itself.
Business Valuation Calculator
Estimate business value from revenue, profit and multiples.
Revenue Growth Rate Calculator
Calculate growth rate between two periods.
Spotted something wrong?
Methodology pages and rate defaults are reviewed annually and after any official rate change. If a number, source, or step is wrong, see the corrections policy for how to report it.