Math & Numbers
Compute period, length, or gravity of a simple pendulum, plus amplitude-based peak speed and energy
pendulum-calculatorMath & Numbers
Calculate buffer solution pH with the Henderson-Hasselbalch equation, or find the acid/base ratio needed for a target pH.
ph-buffer-calculatorMath & Numbers
Determine the limiting reagent and compute theoretical yield, actual yield, and percent yield from a balanced reaction.
reaction-stoichiometry-calculatorMath & Numbers
Convert radians to degrees with configurable decimal precision
radians-to-degreesMath & Numbers
Calculate Pearson r, r squared, covariance, and confidence interval for paired numeric data
pearson-correlation-calculatorMath & Numbers
Calculate one or more percentiles for a numeric dataset with linear, nearest-rank, or exclusive methods
percentile-calculatorMath & Numbers
Convert a normal percentile, tail area, or central area into a standard normal z-score
percentile-to-z-score-calculatorMath & Numbers
Calculate the statistical range of a numeric dataset from its minimum and maximum values
range-calculatorMath & Numbers
Calculate permutations with or without repetition, plus circular arrangements, with formulas and optional steps
permutation-calculatorMath & Numbers
Simplify ratios, calculate ratio shares, and convert between ratio, fraction, and decimal forms
ratio-calculatorMath & Numbers
Calculate percent error between an experimental value and a reference value
percent-error-calculatorMath & Numbers
Calculate the percentage decrease between an original value and a new value
percentage-decrease-calculator