Date Calculator
Count days or shift a calendar date
Open toolUtilZilla / The collection
Calculators.
Get a quick answer with the inputs and assumptions visible. Calculate percentages, discounts, loan installments, tax, or the time between dates.
Ratio Calculator
Simplify ratios and complete proportions
Open toolSavings & Interest Calculator
Explore how a savings balance could grow
Open toolAge Calculator
Calculate exact age from date of birth
Open toolGST Calculator
Calculate Indian GST with full breakdown
Open toolEMI Calculator
Calculate loan EMI with amortization chart
Open toolPercentage Calculator
Calculate any percentage instantly
Open toolBMI Calculator
Calculate your Body Mass Index instantly
Open toolDiscount Calculator
Calculate sale price and savings instantly
Open toolSaved and recent tools are kept on this device. Your tool inputs and files are not saved.
Frequently Asked Questions
Yes. Every listed UtilZilla tool is free to use, with no account or subscription required.
Files and text are processed in your browser. Public-data tools explain the currency, domain or coordinate queries they send when you request data. Advertising and basic analytics are described in our privacy policy.
Click the bookmark beside a tool, then open the Saved view. Your saved list stays in this browser. Clearing site data will remove that list.