Calculators
Everyday math calculators for percentages, ratios, averages, statistics, probability, geometry, and practical number checks.
20 calculators
Each page includes a focused input form, result text, copy button, structured FAQ, and related tool links. Choose a tool below and enter your own values.
Average Calculator
Find the average of multiple numbers.
Combination Calculator
Calculate unordered selections using nCr for probability, teams, and statistics homework.
Decimal to Fraction Calculator
Convert decimal numbers into simplified fractions.
Exponent Calculator
Calculate powers and repeated multiplication with a clear base and exponent breakdown.
Fraction Calculator
Add, subtract, multiply, and divide fractions.
Number Sorter
Sort numbers from low to high or high to low.
Percent Error Calculator
Calculate percent error between an experimental value and accepted value for lab reports.
Percentage Calculator
Calculate percentages, percentage increase, and percentage decrease.
Permutation Calculator
Calculate ordered arrangements using nPr for probability, contests, and math practice.
Prime Number Checker
Check whether a number is prime.
Probability Calculator
Calculate simple probability as favorable outcomes divided by total outcomes.
Proportion Calculator
Solve a missing value in a proportion such as a/b = c/x for scaling and quick math problems.
Random Number Generator
Generate random numbers within a range.
Ratio Calculator
Simplify ratios and compare two values.
Roman Numeral Converter
Convert numbers to Roman numerals.
Rounding Calculator
Round a value to decimal places and compare nearest, floor, and ceiling values.
Scientific Notation Calculator
Convert a standard number into scientific notation with mantissa and exponent.
Square Root Calculator
Find square roots and nearby whole-number squares for measurements and homework checks.
Unit Rate Calculator
Calculate price per item, miles per hour, cost per ounce, or any total divided by units.
Weighted Average Calculator
Calculate a weighted average from values and weights for grades, indexes, scores, and ratings.