General & Everyday Calculators
Calculators for daily life — percentages, tips, dates and quick math. 14 free tools and counting.
Percentage Calculator
Find a percent of a number, percentage change, and what % one number is of another.
Tip Calculator
Split a bill fairly and work out the tip per person in seconds.
Discount Calculator
Work out the sale price and how much you save from a percentage discount.
Average Calculator
Find the mean, sum and count of any list of numbers.
Ratio Calculator
Solve and scale ratios, and reduce them to simplest form.
Age Calculator
Find an exact age in years, months and days from a date of birth.
Date Difference
Count the days, weeks and months between any two dates.
Basic Calculator
A fast everyday calculator — add, subtract, multiply, divide, percentages and memory keys.
Scientific Calculator
Trigonometry, logarithms, powers, roots, factorials and constants — with degree/radian modes.
Fraction Calculator
Add, subtract, multiply and divide fractions, with the result simplified to lowest terms.
GCF & LCM
Greatest common factor and least common multiple of a set of whole numbers.
Prime Number Checker
Check whether a number is prime, show its prime factorisation and the next prime.
Random Number Generator
Generate random numbers in a range. Adjust any field (or hit Reset) to roll again.
Rounding Calculator
Round a number to a chosen number of decimal places, or up/down/towards zero.