Math & Numbers
Convert degrees to gradians with configurable decimal precision
degrees-to-gradiansMath & Numbers
Convert degrees to radians with configurable decimal precision
degrees-to-radiansMath & Numbers
Convert electronvolts to joules with configurable precision
electronvolt-to-jouleMath & Numbers
Calculate Cohen d, Hedges g, Cohen h for proportions, or correlation r effect sizes from summary statistics
effect-size-calculatorMath & Numbers
Compute the dot product, cosine similarity, and angle between two vectors
dot-product-calculatorMath & Numbers
Compute the determinant of a square matrix and explain the main calculation steps
determinant-calculatorMath & Numbers
Check whether one integer is divisible by another and show the quotient, remainder, and optional divisibility hint
divisibility-calculatorMath & Numbers
Calculate natural exponential values e^x, inspect growth factors, and compare them with the inverse e^-x
exponential-calculatorCalculator
Calculate elevation statistics from a list of elevation points
elevation-calculatorMath & Numbers
Calculate discounted prices, savings, and final price after applying percentage or fixed amount discounts
discount-calculatorMath & Numbers
Convert between different density units (kg/m³, g/cm³, lb/ft³, etc.)
density-converterMath & Numbers
Calculate electricity costs based on power consumption and usage time
electricity-calculator