All Online Calculators

Our complete collection of free online calculators, organized by category. Each tool is designed for speed and accuracy — enter your numbers, get your result.

Tools for everyday number problems: percentages, fractions, conversions, and random number generation.

• Percentage Calculator — Calculate percentages, find percentage changes, increase or decrease values by a percentage
• Fraction Calculator — Add, subtract, multiply, and divide fractions and mixed numbers
• Decimal to Fraction — Convert decimals to simplified fractions
• Fraction to Decimal — Convert fractions to decimal values
• Percent to Fraction — Convert percentages to fractions
• Fraction to Percent — Convert fractions to percentages
• Sum Calculator — Add up lists of numbers quickly
• Random Number Generator — Generate random numbers within custom ranges

Tools for smarter financial decisions: interest calculations, tips, and bill splitting.

• Compound Interest Calculator — See how savings grow over time with compound interest
• Tip Calculator — Calculate tips and split bills among groups
• Percentage Calculator — Calculate discounts, taxes, and financial percentages

Health estimates using recognized medical formulas. For general guidance only — consult healthcare professionals for personalized advice.

• BMI Calculator — Calculate Body Mass Index from height and weight
• Calorie Calculator — Estimate daily calorie needs based on activity level

Tools for time calculations that handle leap years, varying month lengths, and complex date math.

• Age Calculator — Calculate exact age from birth date
• Time Calculator — Find the difference between two dates or times
• Countdown Calculator — Count down to any future date or time
• Time Card Calculator — Track work hours and calculate pay