Free financial calculators, explained clearly
Business Calc is a collection of 23 free calculators covering everyday money decisions, loans and savings, business planning, and digital marketing. We want you to understand both the result and the assumptions behind it.
Each calculator explains its formula, provides a worked example and identifies important limits. You can use our tools without creating an account or paying a subscription.
What you can calculate
- Percentages, discounts, sales tax, and inflation.
- Mortgages, loan payments, compound interest, and savings goals.
- Profit margins, break-even points, investment returns, and net present value.
- Advertising returns, conversion rates, and customer lifetime value.
Explore the complete list on the calculator homepage.
Our approach to accuracy
Our calculations are performed in your browser. The underlying calculation functions have automated tests for reference examples and common edge cases, including invalid inputs and division by zero. We review formulas independently of the page design.
Tests cannot guarantee that a model matches every financial situation. For example, mortgage estimates omit some housing costs, and investment projections do not predict future returns. The relevant assumptions are explained next to each tool.
Editorial principles
Calculators are organized by broad practical relevance and topic, not by sponsored placement or claimed search-volume rankings. We aim to improve accuracy and clarity before adding more tools. The website is educational and does not provide personalized professional advice.
Contact Business Calc
Questions, corrections or suggestions? Visit our contact page or email [email protected].