Math & Numbers
Raise a base to any real exponent, with optional scientific notation and verification details
power-calculatorMath & Numbers
Round numbers to integers, decimal places, tens, or hundreds using a simple rounding mode selector
rounding-calculatorMath & Numbers
Count significant figures and round numbers to a target number of significant digits
sig-fig-calculatorMath & Numbers
Calculate square roots, check whether a value is a perfect square, and verify the squared result
square-root-calculatorMath & Numbers
Solve proportion equations of the form a/b = c/d and calculate the missing term
proportion-calculatorMath & Numbers
Add, subtract, multiply, and divide values written in scientific notation, then return standard, scientific, and engineering forms
scientific-notation-calculatorMath & Numbers
Convert numbers between standard decimal format and scientific notation, with optional engineering notation output
scientific-notation-converterMath & Numbers
Estimate required sample size for proportions or means using confidence level, margin of error, and optional finite population correction
sample-size-calculatorMath & Numbers
Run simple linear regression on paired numeric data and inspect slope, intercept, correlation, and predictions
regression-calculatorFinance
Calculate profit/loss for stock call and put options
stock-option-calculatorMath & Numbers
Factor any integer into its prime factors with detailed analysis and mathematical properties.
prime-factorizationMath & Numbers
Check if a number is prime (a natural number greater than 1 that has no positive divisors other than 1 and itself)
prime-number-checker