Math Calculators
From quick arithmetic to trigonometry, geometry, statistics and algebra — our free math calculators solve the problem instantly in your browser.
26 free tools · no sign-up, no adsArea Calculator
Compute areas for rectangles, circles, triangles, and more.
Math CalculatorAspect Ratio
Scale picture sizes and solve for missing proportions.
Math CalculatorBase Converter
Convert numbers between binary, octal, decimal, hex.
Math CalculatorBasic Calculator
Standard arithmetic operations for everyday math.
Math CalculatorBinary to Decimal
Convert base-2 binary values to base-10 and vice-versa.
Math CalculatorCompound Interest Calculator NEW
Grow any amount with flexible compounding and contributions.
Financial CalculatorDate Difference
Days, weeks and months between any two dates.
Math CalculatorDiscount Calculator
Instantly see savings and final prices after any discount.
Math CalculatorFraction to Decimal
Convert and simplify mathematical fractions to decimals.
Math CalculatorGST Calculator
Calculate GST (Goods & Services Tax) or sales tax.
Math CalculatorInflation Calculator
Determine inflation's effect on purchasing power and future costs.
Math CalculatorLCM & HCF
Least common multiples and highest common factors.
Math CalculatorMarks Percentage
Calculate exam marks percentage and grades.
Math CalculatorPercentage Calculator
Calculate percentages, increases, decreases, and ratios.
Math CalculatorPermutation & Combination
Compute nPr and nCr with exact large-number math.
Math CalculatorProbability Calculator
Solve probabilities of single and multiple events.
Math CalculatorPythagorean Theorem
Solve right triangle sides using the geometric theorem.
Math CalculatorQuadratic Equation
Solve quadratic equations with steps and discriminant.
Math CalculatorRandom Number Generator
Generate random numbers in any range, with options.
Math CalculatorRoman Numerals
Convert numbers to Roman numerals and back.
Math CalculatorScientific Calculator
Advanced functions including trigonometry, logarithms, and more.
Math CalculatorSimple vs Compound
Compare simple and compound interest gains over time.
Financial CalculatorStatistics Calculator
Mean, median, mode, and standard deviation in one click.
Math CalculatorTime Calculator
Add or subtract hours, minutes and seconds.
Math CalculatorUnit Converter
Convert between length, weight, and volume units easily.
Conversion CalculatorVolume Calculator
Calculate volumes and areas for standard 3D shapes.
Math CalculatorExplore Other Categories
Climate & Sustainability Calculators
Carbon, energy, water & green living.
15 calculatorsUnit & Conversion Calculators
Units, currencies, time zones & measurements.
11 calculatorsDeveloper & Web Tools
Encoding, hashing, JSON, regex & web utilities.
25 calculatorsEducation & Student Calculators
Grades, GPA, percentage & study helpers.
16 calculatorsFinancial Calculators
Loans, investments, tax, salary & money planning.
37 calculatorsHealth & Fitness Calculators
BMI, calories, fitness, pregnancy & medication.
20 calculatorsMath Calculators
Numbers, algebra, geometry & everyday arithmetic.
26 calculators