Random Number Generator

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Percentage Calculator

Calculate percentages, changes, and find what percent one number is of another

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Unit Converter

Convert length, weight, temperature, and more

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BMI Calculator

Calculate your Body Mass Index with metric or imperial units

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Tip Calculator & Bill Splitter

Calculate tip amount and split the bill among any group

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Number Base Converter

Convert numbers between binary, octal, decimal, and hexadecimal

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Roman Numeral Converter

Convert numbers to Roman numerals and back (1–3999)

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Compound Interest Calculator

Calculate compound interest with year-by-year breakdown

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Discount Price Calculator

Find final price, discount percentage, or original price

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Statistics Calculator

Calculate mean, median, mode, standard deviation, and more

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Prime Number Checker

Check if a number is prime and generate primes up to N

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Loan & Mortgage Calculator

Calculate monthly payments, total interest, and full amortization schedule

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Aspect Ratio Calculator

Calculate missing width or height from an aspect ratio. Supports 16:9, 4:3, and custom ratios

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GPA Calculator

Calculate semester and cumulative GPA from courses, grades, and credit hours

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Calorie & BMR Calculator

Calculate your BMR and daily calorie needs based on activity level and goal

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Loan EMI Calculator

Calculate monthly EMI, total interest, and repayment for any loan.