4 Calculators
Math & Science
Find easy calculators for solving ratios, percent error, half-life, and proportionality, helping you break down math and science questions with clear, fast answers.
Rule of Three Calculator
Solve proportions and ratios using the Rule of Three method.
Calculate NowPercent Error Calculator
Calculate the percent error between an experimental value and an accepted value.
Calculate NowHalf-Life Calculator
Determine the remaining quantity of a substance after a given number of half-lives.
Calculate NowConstant of Proportionality Calculator
Find the constant of proportionality in direct and inverse proportional relationships.
Calculate Now