Best Free Calculator Tools Online

Whether you need to figure out a tip, understand a loan payment, or calculate percentages, these free online calculators have you covered. Every tool runs directly in your browser with no signup required.

Percentage Calculator

The most versatile percentage tool available. Handles three calculation modes: finding a percentage of a number, determining what percentage one number is of another, and calculating percentage change between two values. Perfect for shopping discounts, grade calculations, and financial analysis.

Age Calculator

More than just your age in years — this calculator shows your exact age in years, months, and days, and counts down to your next birthday. Great for legal documents, birthday planning, and satisfying curiosity.

Loan Payment Calculator

Enter your loan amount, interest rate, and term to see your monthly payment, total amount paid, and total interest. Essential before taking on any debt — mortgage, car loan, or personal loan.

Tip Calculator

Split the bill with confidence. Enter the bill amount, select a tip percentage (or choose from quick presets), and optionally split among multiple people. Shows per-person totals instantly.

All of these calculators are available for free on Tellime with no ads, no signup, and complete privacy.