All Free Calculators & Tools
Browse our complete library of verified business, financial, SaaS, and spreadsheet tools.
Available Calculators
Break-Even Calculator
Find how many units you must sell to cover costs. Add a target profit, see every step, and keep your numbers private.
Profit Margin Calculator
Work out gross, operating and net margin from revenue and costs, or find the price that hits a target margin. Steps shown.
Markup vs Margin Calculator
Convert markup to margin and back in one step. See why a 50% markup is only a 33% margin, with a full conversion table.
Percentage Change Calculator
Calculate percent increase, decrease or difference between two numbers, with Excel formulas and worked examples.
CAC and LTV Calculator
Calculate CAC, customer lifetime value, LTV to CAC ratio and payback months from your own numbers. No signup.
SaaS Churn Rate Calculator
Calculate customer and revenue churn, convert monthly churn to an annual rate and see your expected customer lifetime.
MRR and ARR Calculator
Turn new, expansion, contraction and churned MRR into ending MRR, ARR, growth rate and your SaaS quick ratio.
ROI Calculator
Calculate return on investment and annualized ROI from your costs and final value. Free, with the formula and examples.
CAGR Calculator
Find the compound annual growth rate between two values, with the Excel formula, a yearly table and a worked example.
Compound Interest Calculator
See how savings grow with monthly contributions and different compounding. Yearly table and CSV download included.
Loan EMI Calculator
Calculate your monthly loan payment, total interest and a full amortization schedule. Test extra payments to save interest.
NPV and IRR Calculator
Enter cash flows to get net present value, internal rate of return and discounted payback. Includes the Excel NPV trap explained.
Excel Formula Generator
Build Excel and Google Sheets formulas from plain choices. Get the formula, an explanation and fixes for common errors.
SQL Formatter
Paste messy SQL and get readable, consistent code. Runs in your browser, nothing is uploaded. Choose case and indent.
CSV Quick Stats
Get mean, median, mode, standard deviation and quartiles for every column in a CSV. Your file never leaves your browser.