Calculator Tools

About Calculator Tools

Basic, scientific, financial, business, and specialized calculators. Percentage, BMI, loan, age, date difference, and more — all free online.

Available Tools in This Category

• Basic Calculator — Simple calculator for addition, subtraction, multiplication, and division.
• Scientific Calculator — Advanced calculator with trigonometry, logarithms, and exponentials.
• Loan Calculator — Calculate monthly payments, interest, and amortization schedules.
• Interest Calculator — Calculate simple and compound interest on investments and savings.
• Mortgage Calculator — Calculate monthly mortgage payments and total costs.
• ROI Calculator — Calculate return on investment and investment performance.
• Profit Margin Calculator — Calculate profit margin, markup, and pricing.
• Tax Calculator — Calculate VAT, sales tax, and income tax.
• Discount Calculator — Calculate discount amounts and final prices.
• Salary Calculator — Calculate net salary, deductions, and take-home pay.
• Currency Converter — Convert between currencies with live exchange rates.
• BMI Calculator — Calculate Body Mass Index and health category.
• Age Calculator — Calculate exact age in years, months, days, and more.
• Date Difference Calculator — Calculate the number of days between two dates.
• Pregnancy Calculator — Calculate due date and pregnancy week.
• GPA Calculator — Calculate Grade Point Average and cumulative GPA.
• Date Difference Calculator — Calculate days between dates
• GPA Calculator — Calculate your GPA
• Salary Calculator — Calculate net salary after taxes

Why Use XIIIXII Calculator Tools?

All our calculator tools are completely free to use, with no registration required. They run directly in your browser, meaning your files and data stay private on your device. Whether you're a professional, student, or casual user, our tools are designed to be fast, intuitive, and reliable.