Math Calculator’s & Online Number Tools
Instantly solve math challenges with our online math calculators—convert, round, calculate, and check your work. Perfect for students, teachers, and professionals. Find binary/decimal/hex converters, percent calculators, logs, fractions, exponents, permutation-combination and more.
Binary, Hex & Number Base Calculators
Binary Calculator
Add, subtract, multiply, and divide binary numbers and convert between bases.
Convert Binary to Decimal
Easily transform binary numbers to decimal—core for computer science, digital logic.
Convert Decimal to Binary
Convert any decimal number to binary for school, engineering, or programming needs.
Hex Calculator
Hexadecimal addition, subtraction, and conversions for digital and coding work.
Hex to Decimal Converter
Convert hex values into decimals for quick base-16 to base-10 accuracy.
Decimal to Hex Converter
Switch from decimal to hex, instant coding & engineering conversions.
Two's Complement Calculator
Find two’s complement for binary math—used in signed number representations.
Percentage & Percent Error Calculators
Value Given Percent Calculator
Find total when you know the percent and amount—used in everyday math and finance.
Percent Given Value Calculator
Calculate what percentage one value is of another—quick school/work tool.
Percentage Calculator
Find, increase/decrease, and part/whole percentages in every scenario.
What Percentage of Calculator
What is X percent of Y? Find the answer instantly, shown step by step.
Percentage Difference Calculator
Compare differences in values as a percent—helpful in finance, science, & business.
Percentage Change Calculator
Calculate growth, shrinkage, and change rates for school and work.
Percentage Error Calculator
Measure experimental/actual versus theoretical value in science labs and engineering.
Percentage Experimental Value
Compare lab/measured value to accepted value, key for science projects.
Percentage Theoretical Value
Compute percent based on theoretical values, experiment or calculation.
Percent to Fraction Calculator
Convert percentages into simplified fractions in one step.
Percentage to Decimal Calculator
Switch percentages to decimals for spreadsheets, math, and science tasks.
Math, Logarithm, Fraction & Rounding Tools
Fraction Calculator
Add, subtract, multiply, divide fractions and mixed numbers, all steps shown.
Significant Figures Calculator
Round numbers to correct significant digits, with clear math explanations.
Rounding Calculator
Round to nearest integer, tens, hundreds, etc.—great for assignments.
Remainder Calculator
Get remainder of division problems—long division made easy.
Log Calculator
Calculate logarithms for any base, anti-log, exponential forms, and more.
Log Base 2 Calculator
Find binary logs—core for computer science, electronics, and math.
Exponent Calculator
Evaluate and simplify exponents, powers, and indices for all grades.