Math Calculators
Find free online calculators for percentages, fractions, number systems, statistics and measurements. Choose a tool, enter your values and review the result with formulas and examples.
= 45 Find the right calculation.
Percentage Calculators
Calculate a percentage or compare changes in values.
Numbers & Conversions
Convert number formats and solve mathematical expressions.
Decimal to Fraction Calculator
Convert decimals into simplified fractions and fractions back into decimal values.
Open calculator ƒxScientific Calculator
Calculate powers, roots, logarithms, trigonometric functions and advanced arithmetic.
Open calculator 16Hex to Decimal Converter
Convert hexadecimal numbers to decimal and reverse the conversion on the same page.
Open calculatorStatistics & Measurement
Calculate averages, data variation and physical density.
Average Calculator
Find mean, median, mode, range and sum with step-by-step calculations.
Open calculator σStandard Deviation Calculator
Calculate sample and population standard deviation, variance and other statistics.
Open calculator ρDensity Calculator
Find density, mass or volume with metric and imperial measurement units.
Open calculatorFind the Right Math Calculator
CalculatorForWork provides tools for different types of math questions. If you need to calculate a percentage of a number, choose Percentage Calculator. If you want to compare an original number with a new number, choose Percentage Change Calculator instead.
For a list of numbers, Average Calculator helps you find the mean, median and mode. Standard Deviation Calculator shows how widely the values are spread around their mean. These tools answer different statistical questions.
Numbers, Fractions and Conversions
Decimal to Fraction Calculator converts decimals into simplified fractions and also supports reverse conversion. Hex to Decimal Converter helps convert base-16 numbers to ordinary decimal values. Scientific Calculator supports more advanced operations, including powers, roots, logarithms and trigonometric functions.
Scientific and Measurement Calculations
Density Calculator uses the relationship between mass, volume and density. Enter two known measurements to calculate the third. Always check your input units and the resulting units before using the answer.
Frequently Asked Questions
Are these math calculators free?
Yes. All eight linked calculators are free to use.
Which calculator finds mean, median and mode?
Use Average Calculator to find these statistics.
Can I convert a fraction into a decimal?
Yes. The Decimal to Fraction Calculator supports both directions.
What is the difference between percentage and percentage change?
A percentage represents a share of a number. Percentage change compares a new value with a starting value.