Math Calculators
Use free online math calculators for percentages, fractions, statistics, geometry, equations, number tools, grades, and date calculations.
How to choose the right tool
Start with the kind of number problem you are solving: a quick percentage, a school formula, a statistics summary, or a geometry measurement.
Most math tools accept decimals and whole numbers. List-based tools usually accept comma, space, or line-separated values.
Choose by need
- Use percentage tools for discounts, markups, tax, tips, and change over time.
- Use algebra and geometry tools when you need a formula result plus working steps.
- Use statistics tools when your input is a list of values rather than one number.
Common tasks
- Check a sale price after a discount.
- Find the mean and standard deviation of a dataset.
- Solve a triangle, circle, fraction, ratio, or grade calculation.
Choose a tool and get an instant result
BlinkCalc tools are designed to be fast, practical, privacy-conscious, and easy to understand. Many tools process inputs directly in your browser; tools that need a remote request explain that processing on their page.
Absolute Value Calculator
Calculate the absolute value of any number or expression instantly.
Algebra Calculator
Solve common algebra problems including equations, expressions, factoring, expansion, quadratics, and simple systems with step-by-step explanations.
Average Calculator
Paste a list of numbers to instantly get the mean, sum, count, min, and max.
Basic Calculator
A clean, keyboard-friendly calculator for everyday arithmetic: add, subtract, multiply, divide.
Binary Calculator
Add, subtract, multiply, and divide binary numbers.
Circle Calculator
Calculate area, circumference, diameter, and radius of any circle.
Combinations Calculator
Calculate combinations (nCr) and permutations (nPr) instantly.
Density Calculator
Calculate density, mass, or volume from any two known values.
Discount Calculator
Calculate the final price, discount amount, and savings from any percentage off.
Exponent Calculator
Calculate any base raised to any power, including fractional exponents.
Factorial Calculator
Calculate the factorial of any non-negative integer with step-by-step working.
Fibonacci Calculator
Generate the Fibonacci sequence up to any number of terms instantly.
Final Grade Calculator
Find out exactly what score you need on your final exam.
Fraction Calculator
Add, subtract, multiply, or divide fractions with step-by-step working.
Fraction to Decimal Converter
Convert fractions, mixed numbers, and improper fractions to decimals and percentages with simplified results.
GATE Virtual Calculator
Practice GATE-style scientific calculations with an unofficial online virtual calculator for Indian engineering exam preparation.
GPA Calculator
Add courses, select grades, and enter credit hours to calculate your GPA.
Grade Calculator
Calculate your weighted course grade from multiple assignments and tests.
Half-Life Calculator
Calculate remaining quantity after radioactive decay using half-life formulas.
LCM & GCF Calculator
Find the Least Common Multiple and Greatest Common Factor of any numbers.
Logarithm Calculator
Calculate log base 10, natural log, and any custom base logarithm.
Mean Median Mode Calculator
Calculate mean, median, mode, and range from any list of numbers.
Modulo Calculator
Calculate the remainder of any division operation instantly.
Number Rounding Calculator
Round any number to decimal places, significant figures, or the nearest integer.
Number to Words Converter
Convert any number into its written English word form.
Percentage Calculator
Calculate percentages, increases, decreases, and percentage differences instantly.
Percentage Decrease Calculator
Find the percentage drop between two values.
Percentage Increase Calculator
Calculate the percentage increase or decrease between two values.
Percentage of Total Calculator
Find what percentage one number is of another instantly.
Prime Number Checker
Check if any number is prime and find prime factors instantly.
Probability Calculator
Calculate single and multiple event probabilities with step-by-step solutions.
Pythagorean Theorem Calculator
Find any side of a right triangle with step-by-step solution.
Quadratic Equation Solver
Solve ax² + bx + c = 0 instantly with full step-by-step solution.
Ratio Calculator
Simplify any ratio A:B and get the decimal and percentage form.
Sample Size Calculator
Find the right survey sample size for any confidence level and margin of error.
Scientific Calculator
Full-featured scientific calculator with trig, logarithms, and powers.
Scientific Notation Calculator
Convert numbers to and from scientific notation and perform arithmetic.
Significant Figures Calculator
Round any number to a specified number of significant figures.
Speed Distance Time Calculator
Solve for speed, distance, or time given the other two values.
Standard Deviation Calculator
Calculate population and sample standard deviation, variance, and mean.
Triangle Area Calculator
Calculate triangle area using base & height or Heron's formula.
Trigonometry Calculator
Compute all six trig functions for any angle in degrees or radians.
Weighted Average Calculator
Calculate a weighted average from values and weights using number or percent weights, with a full row breakdown.
Z-Score Calculator
Calculate the z-score for any value in a data set and find the percentile.
Related categories
Finance
Plan loans, savings, investments, salaries, taxes, retirement, budgets, interest, and mortgage payments with free finance calculators.
Health
Calculate BMI, calories, macros, heart rate zones, pregnancy dates, hydration, fitness metrics, body composition, and wellness estimates.
Converters
Convert length, weight, temperature, area, volume, speed, time, energy, data storage, and other common measurement units online.
Date & Time
Free date and time tools to convert Unix timestamps, calculate the difference between dates, count down to a deadline, switch time zones, and convert military time.
Everyday
Practical everyday calculators for paint coverage, concrete and gravel volumes, electricity costs, wind chill, heat index, fuel cost, ABV, and more.
Developer Tools
Free online developer tools including JSON formatters, encoders, converters, validators, generators, regex testers, and debugging utilities. No signup, runs in your browser.
Frequently asked questions
Are these math calculators free?
Yes. Every calculator on this page is free, runs entirely in your browser, and requires no account.
Can I use these calculators on my phone?
Yes. All math calculators are fully responsive and work on phones, tablets, laptops, and desktops.
Do you show working out, not just the answer?
Where it makes sense, yes. Calculators like the fraction calculator, quadratic solver, Pythagorean theorem calculator, and standard deviation calculator include step-by-step explanations alongside the result.