Every calculator you need, in one place.

Core arithmetic, percentages, roots and number tools.

• Basic Calculatorsoon
• Percentage Calculator→
• Fraction Calculator→
• Decimal Calculatorsoon
• Scientific Calculatorsoon
• Ratio Calculatorsoon
• Average Calculator→
• Mean Median Mode Calculatorsoon
• Prime Number Calculatorsoon
• Factorial Calculator→
• Square Root Calculator→
• Cube Root Calculatorsoon
• Exponent Calculatorsoon
• Log Calculatorsoon
• LCM Calculatorsoon
• GCF Calculatorsoon
• Fibonacci Calculator→
• Binary Calculator→
• Modulo Calculator→
• Roman Numeral Converter→
• Absolute Value Calculator→
• Number Base Converter→
• Random Number Generatorsoon
• Rounding Calculatorsoon
• Significant Figures Calculatorsoon

Equations, expressions, matrices and sequences.

• Quadratic Equation Calculator→
• Polynomial Calculatorsoon
• Matrix Calculatorsoon
• Determinant Calculatorsoon
• Simultaneous Equation Solversoon
• Linear Equation Calculator→
• Inequality Calculatorsoon
• Completing the Square Calculatorsoon
• Binomial Expansion Calculatorsoon
• Rational Expression Calculatorsoon
• Partial Fraction Calculatorsoon
• Logarithm Equation Solversoon
• Algebra Simplifiersoon
• Sequence Calculatorsoon
• Arithmetic Sequence Calculator→
• Geometric Sequence Calculatorsoon

Area, volume, angles and coordinate geometry.

• Triangle Calculator→
• Right Triangle Calculatorsoon
• Pythagorean Theorem Calculator→
• Circle Area Calculator→
• Circle Circumference Calculatorsoon
• Sphere Volume Calculator→
• Cylinder Volume Calculator→
• Cone Volume Calculator→
• Cube Volume Calculatorsoon
• Rectangle Area Calculator→
• Square Area Calculatorsoon
• Parallelogram Area Calculator→
• Trapezoid Area Calculator→
• Polygon Area Calculatorsoon
• Surface Area Calculator→
• Distance Between Two Points Calculatorsoon
• Midpoint Calculatorsoon
• Slope Calculatorsoon

Distributions, dispersion and probability tools.

• Mean Calculatorsoon
• Median Calculatorsoon
• Mode Calculatorsoon
• Standard Deviation Calculator→
• Variance Calculator→
• Probability Calculator→
• Z Score Calculatorsoon
• Normal Distribution Calculatorsoon
• Binomial Distribution Calculatorsoon
• Permutation Calculatorsoon
• Combination Calculator→
• Confidence Interval Calculator→
• Sample Size Calculator→
• Correlation Coefficient Calculatorsoon
• Regression Calculatorsoon

Interest, loans, tax and investment planning.

• Simple Interest Calculator→
• Compound Interest Calculator→
• Loan EMI Calculator→
• Mortgage Calculator→
• Investment Calculator→
• Savings Calculatorsoon
• ROI Calculator→
• Profit Margin Calculatorsoon
• Discount Calculator→
• Sales Tax Calculatorsoon
• Sales Tax Calculator→
• Currency Converter→
• Payback Period Calculatorsoon
• Net Present Value Calculatorsoon
• Internal Rate of Return Calculatorsoon
• Inflation Calculator→
• Salary Calculatorsoon
• Budget Calculatorsoon

Body metrics, nutrition and wellness tools.

• BMI Calculator→
• BMR Calculator→
• Body Fat Calculatorsoon
• Ideal Weight Calculatorsoon
• Sleep Calculator→
• Macro Calculator→
• Calories Burned Calculator→
• Ovulation Calculator→
• Pregnancy Week Calculator→
• VO2 Max Calculator→
• Calorie Calculator→
• Daily Water Intake Calculatorsoon
• Pregnancy Due Date Calculatorsoon
• Ovulation Calculator→
• Heart Rate Calculatorsoon
• Blood Alcohol Calculatorsoon
• TDEE Calculatorsoon
• Protein Intake Calculatorsoon
• Macro Calculator→
• Step to Calorie Calculatorsoon

Convert length, weight, temperature and more.

• Length Converter→
• Weight Converter→
• Temperature Converter→
• Area Converter→
• Volume Converter→
• Speed Converter→
• Time Converter→
• Pressure Converter→
• Energy Converter→
• Power Converter→
• Angle Converter→
• Data Storage Converter→
• Fuel Economy Convertersoon

Handy tools for daily life and planning.

• Age Calculator→
• Date Difference Calculator→
• Time Duration Calculatorsoon
• Work Hours Calculatorsoon
• Unit Price Calculator→
• Grade Calculator→
• Hours Calculator→
• Word Counter→
• Reading Time Calculator→
• Fuel Cost Calculator→
• Tip Calculator→
• Split Bill Calculatorsoon
• Love Calculatorsoon
• Random Name Pickersoon
• Countdown Calculatorsoon
• Password Strength Calculatorsoon
• GPA Calculator→
• Grade Calculator→
• Time Zone Convertersoon
• Retirement Calculatorsoon
• Life Expectancy Calculatorsoon

Accurate, transparent formulas

Every calculator shows the formula it uses and a worked example, so you're never just trusting a black box.

Built for everyone, worldwide

Finance tools are US and internationally focused with dollar examples, while unit converters support metric and imperial systems globally.

Fast, private, and free

All calculations run instantly in your browser — no sign-up, no data sent to a server, no waiting.