Basic Math Calculators
Fast calculators for percentages, rounding, unit rates, LCM, GCD, and long division.
Tools in this category
Choose a calculator and continue to the dedicated tool page.
Inverse Tangent Calculator
Compute arctan(x) in degrees and radians with quick exact values.
Percentage Error Calculator
Compare observed and true values with signed and absolute percent error.
Significant Figures Calculator
Calculate significant figures with mathematical expressions.
Discount Calculator
Calculate sale prices, percentage off, and savings.
Tip Calculator
Calculate restaurant tip, split bills, and reverse-calculate bill amount from total paid.
Percentage Calculator
Calculate percentage of a number, percentage change, and common percent problems.
Percent Change Calculator
Find percent increase, percent decrease, original value, and final value.
Unit Rate Calculator
Find cost per unit and compare which option is the better deal.
Number Rounding Calculator
Round numbers to any place value.
LCM and GCD Calculator
Find the least common multiple or greatest common divisor of up to 5 numbers.
Long Division Calculator with Steps
Divide whole numbers with quotient, remainder, decimal expansion, and step-by-step work.
Hebrew Gematria Calculator
Calculate Hebrew Gematria values for words and phrases.