Free Online Calculators
50+ calculators for finance, health, math, and everyday tasks. 100% free, no signup required.
Finance
Tip Calculator
Calculate tip amount and split bills easily between friends.
Mortgage Calculator
Estimate your monthly mortgage payments and total interest.
Compound Interest
See how your savings grow over time with compound interest.
Loan Calculator
Calculate monthly loan payments and total interest costs.
Salary Calculator
Convert between hourly, weekly, monthly, and annual salary.
Auto Loan Calculator
Calculate monthly car payments and total financing costs.
Discount Calculator
Calculate sale prices and how much you save on discounts.
Inflation Calculator
Calculate how inflation affects purchasing power over time.
Retirement Calculator
Plan how much you need to save for retirement.
Loan Payoff Calculator
See how extra payments help you pay off debt faster.
Health & Fitness
BMI Calculator
Calculate your Body Mass Index and see your health category.
Calorie Calculator
Find your daily calorie needs based on your activity level.
Body Fat Calculator
Estimate your body fat percentage using the U.S. Navy method.
Ideal Weight Calculator
Find your ideal weight range based on height and gender.
Pregnancy Due Date
Calculate your estimated due date and pregnancy timeline.
Sleep Calculator
Find the best time to sleep or wake based on sleep cycles.
Pace Calculator
Calculate pace, time, or distance for running and cycling.
Heart Rate Zones
Find your target heart rate zones for effective training.
Water Intake Calculator
Calculate how much water you should drink daily.
Ovulation Calculator
Estimate your fertile window based on your cycle.
Date & Time
Age Calculator
Calculate your exact age in years, months, and days.
Date Difference
Find the number of days between two dates.
Time Zone Converter
Convert time between cities worldwide with live clock.
Countdown Timer
Count down days, hours, and minutes to any event.
Time Calculator
Add or subtract hours, minutes, and seconds.
Math & Education
Percentage Calculator
Calculate percentages, increases, decreases, and more.
GPA Calculator
Calculate your Grade Point Average from your grades.
Fraction Calculator
Add, subtract, multiply, and divide fractions easily.
Random Number Generator
Generate random numbers, roll dice, or flip coins.
Scientific Notation
Convert and calculate with scientific notation.
Ratio Calculator
Solve proportions and simplify ratios easily.
Hex/Binary Converter
Convert between hex, binary, decimal, and octal.
Grade Calculator
Calculate weighted grades and final exam scores needed.
Average Calculator
Calculate mean, median, mode, and range of numbers.
Converters
Unit Converter
Convert between different units of measurement.
Square Footage Calculator
Calculate area for rooms, floors, and land in any shape.
Cooking Converter
Convert cups, tablespoons, teaspoons, and other kitchen measurements.
Temperature Converter
Convert between Fahrenheit, Celsius, and Kelvin.
Data Storage Converter
Convert between bytes, KB, MB, GB, and TB.
Shoe Size Converter
Convert between US, UK, EU, and CM shoe sizes.
Color Converter
Convert between HEX, RGB, and HSL color formats.
Home Improvement
Everyday Tools
Password Generator
Generate secure, random passwords with custom options.
Gas Mileage Calculator
Calculate MPG and estimate fuel costs for trips.
Electricity Cost Calculator
Calculate how much your appliances cost to run.
Dog Age Calculator
Convert your dog's age to human years by size.
Subnet Calculator
Calculate IP subnet info from CIDR notation.
Ring Blank Sizing
Calculate blank length for any ring size and metal thickness.
Bracelet Size Calculator
Find the perfect bracelet or bangle size for any wrist.
Necklace Length
Find the perfect chain length for any style.
100% Free
No hidden fees, no watermarks, no limits
Instant Results
Results calculate in real-time as you type
Privacy First
No data stored, everything runs locally
No Account Needed
Just open and calculate, no signup required