Calculate the answer.
Understand the method.
Every PEARL calculator validates your input and explains the mathematical steps—not just the final number.
LCM Calculator
Find the least common multiple with prime-factorisation steps.
Open calculator →HCF / GCD Calculator
Find the highest common factor using the Euclidean method.
Open calculator →Factors Calculator
List every positive factor of a whole number.
Open calculator →Prime Factorisation Calculator
Write a number as a product of prime factors.
Open calculator →Divisibility Checker
Check whether one whole number divides another exactly.
Open calculator →Ratio Simplifier
Reduce a two-part ratio to its simplest form.
Open calculator →Direct Proportion Calculator
Find the missing fourth term in a direct proportion.
Open calculator →Average Calculator
Calculate the arithmetic mean of several values.
Open calculator →Alligation Calculator
Find the mixing ratio for two prices or concentrations.
Open calculator →Profit or Loss Calculator
Calculate profit or loss amount and percentage.
Open calculator →Discount Calculator
Calculate discount amount and final selling price.
Open calculator →Simple Interest Calculator
Calculate simple interest and total amount.
Open calculator →Compound Interest Calculator
Calculate annually compounded interest and amount.
Open calculator →Time and Work Calculator
Find the time two people take to complete work together.
Open calculator →Pipes and Cisterns Calculator
Find filling time when an inlet and outlet operate together.
Open calculator →Speed, Distance and Time Calculator
Find travel time from distance and speed.
Open calculator →Train Crossing Calculator
Find the time a train takes to cross a platform.
Open calculator →Boats and Streams Calculator
Calculate upstream and downstream speeds.
Open calculator →Age Ratio Calculator
Find ages from their ratio and total.
Open calculator →Circle Calculator
Calculate circumference and area of a circle.
Open calculator →Rectangle Calculator
Calculate rectangle area, perimeter and diagonal.
Open calculator →Triangle Area Calculator
Calculate triangle area from base and height.
Open calculator →Cylinder Calculator
Calculate cylinder volume and curved surface area.
Open calculator →