Every calculator you need, in one place.

Core arithmetic, percentages, roots and number tools.

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

Equations, expressions, matrices and sequences.

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

Area, volume, angles and coordinate geometry.

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

Distributions, dispersion and probability tools.

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

Interest, loans, tax and investment planning.

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

Body metrics, nutrition and wellness tools.

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

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 Converter→

Handy tools for daily life and planning.

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

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.