General Calculators
Percentages, discounts, dates, age and everyday math tools. Browse our collection of 26 free online calculators — fast, accurate, and ready to use.
Percentage Calculator
Quickly calculate percentages for any situation – find a percent of a number, percentage change, or percent difference.
CalculateDiscount Calculator
Calculate the final price after a discount percentage and see how much money you save on sale items.
CalculateDate Calculator
Calculate the number of days, weeks, months, and years between two dates, or add/subtract days to a date.
CalculateAge Calculator
Calculate exact age in years, months, and days from a birth date, plus find your next birthday countdown.
CalculateTime Calculator
Add or subtract hours, minutes, and seconds. Calculate time duration between two times with easy time math.
CalculateHours Calculator
Calculate work hours between clock in and clock out times. Deduct lunch breaks and get total hours worked.
CalculateTip Calculator
Calculate tip amount and total bill. Split the bill evenly among any number of people with preset tip percentages.
CalculateUnit Converter
Convert between units of length, weight, temperature, volume, and area. Fast and accurate unit conversion tool.
CalculatePercentage Change Calculator
Calculate the percentage change between two numbers. Shows increase or decrease direction with the exact percentage.
CalculateOvertime Calculator
Calculate overtime pay at 1.5x your regular rate with regular and overtime hours.
CalculateCommission Calculator
Calculate sales commission from a sale amount and commission rate with a base pay option.
CalculateFuel Cost Calculator
Estimate trip fuel cost from distance, fuel economy, and gas price.
CalculateMileage Reimbursement Calculator
Calculate mileage reimbursement using the IRS standard mileage rate for business and medical driving.
CalculatePassword Generator
Generate strong, secure random passwords with customizable length and character sets.
CalculateConversion Calculator
Convert between metric and imperial units for length, weight, temperature, area, volume, speed, time, and data.
CalculateRoman Numeral Converter
Convert Arabic numbers to Roman numerals and back, with step-by-step breakdown (1-3999).
CalculateTime Zone Converter
Convert time between world time zones and see current times in major cities worldwide.
CalculateLove Calculator
Find your fun love compatibility percentage by name with a playful match rating.
CalculateWord Counter - Count Words, Characters & Sentences
Count words, characters, sentences, and paragraphs in real time with reading time estimates.
CalculateJSON Formatter & Validator - Format JSON Online
Format, minify, and validate JSON data with clear syntax error messages.
CalculateUnix Timestamp Converter - Epoch to Date Converter
Convert Unix timestamps to readable dates and back, supporting seconds, milliseconds, and microseconds.
CalculateUUID Generator - Generate UUID v4 & GUID Online
Generate cryptographically secure UUID v4 / GUID values, one at a time or in bulk.
CalculateColor Converter - HEX to RGB & HSL Converter
Convert colors between HEX, RGB, and HSL formats with a live color preview.
CalculateBase64 Encoder & Decoder - Encode Decode Online
Encode and decode Base64 text with full UTF-8 support for Unicode characters.
CalculateMD5 Hash Generator - Generate MD5 Online
Generate 128-bit MD5 hashes from any text, with support for hashing multiple lines at once.
CalculateURL Encoder & Decoder - Encode Decode URLs Online
Encode and decode URLs, query strings, and special characters for safe web use.
CalculateExplore More Calculators
Finance Calculators
Mortgage, loans, interest, savings, and retirement planning tools
Health Calculators
BMI, calorie needs, body fat and other fitness tools
Math Calculators
GPA, fractions, statistics, geometry and more math tools
Niche Calculators
Specialized calculators for roofing, ecommerce sellers and more
Construction Calculators
Concrete, lumber, roofing, flooring and other building material tools