Calculators
84 tools available
Age Calculator
Calculate your exact age in years, months and days, find your age on any date, and see your next birthday, total time lived, zodiac sign and age milestones.
Age Difference Calculator
Angle Converter
Area Calculator
Calculate area of 11 2D shapes and 6 3D shapes with unit conversion.
Aspect Ratio Calculator
Calculate aspect ratio from dimensions and scale images while maintaining the ratio.
Average Calculator
Blood Pressure Chart
BMI Calculator
Calculate your BMI from height and weight and get a detailed health report with BMI category, healthy weight range, body fat estimate, calories, macros and more.
Body Fat Calculator
Estimate body fat percentage using measurements like waist, neck, and height (Navy method).
Calorie Burned Calculator
Calculate calories burned during 50+ exercises and activities.
Calorie Deficit Calculator
Circle Calculator
Coin Flip
Flip a virtual coin online — heads or tails. Tracks flip count, streaks, and history.
Countdown Timer
Set a custom countdown timer with audio alert, multiple timers, and optional full-screen mode.
Date Calculator
Calculate the difference between two dates, or add and subtract days, weeks, and months from any date.
Day of the Week Calculator
Days Until Calculator
Dice Roller
Roll 1–6 dice online instantly. Shows results, sum, and roll history.
Discount Calculator
Calculate the sale price after a percentage discount, or find what discount percentage was applied.
Dog Age Calculator
Electricity Bill Calculator
Exponent Calculator
Calculate powers, roots, and logarithms with scientific notation and step-by-step results.
Fibonacci Sequence Generator
Fraction Calculator
Add, subtract, multiply, and divide fractions with step-by-step solution shown.
Fuel Cost Calculator
Calculate the fuel cost for any trip by entering your distance, fuel efficiency, and current fuel price.
GPA Calculator
Calculate semester GPA and cumulative GPA on the 4.0 scale with weighted credit hours.
Grade Calculator
Calculate your weighted grade average, GPA, or the score you need on your final exam to pass.
Gravity Calculator
Heart Rate Zones Calculator
Ideal Weight Calculator
Find your ideal body weight range using 5 proven medical formulas.
LCM and GCF Calculator
Calculate Least Common Multiple (LCM) and Greatest Common Factor (GCF) for up to 6 numbers.
Long Division Calculator
Love Calculator
Calculate love compatibility percentage between two names — for fun and entertainment.
Lucky Number Generator
Generate personalized lucky numbers and life path number from your name and date of birth.
Macro Calculator
Calculate your daily protein, carbs, and fat goals based on your body and fitness goal.
Magic 8 Ball
Matrix Calculator
Add, subtract, multiply, find determinant, transpose, and invert matrices of any size.
Mean Median Mode Calculator
Menstrual Cycle Calculator
Predict your next period, ovulation window, and fertile days based on your cycle history.
Minutes to Hours Converter
Modulo Calculator
Multiplication Table
Number Guessing Game
Number Sorter
Sort a list of numbers ascending or descending with full statistical analysis.
Numerology Calculator
Calculate your life path number, expression number, and soul urge number from name and DOB.
Ovulation Calculator
Find your most fertile days and ovulation date based on your last period and cycle length.
Pace Calculator
Calculate running pace, speed, and finish time for any race distance.
Percentage Calculator
Calculate percentages, find increase/decrease, reverse percent, and tip — four modes, instant results.
Percentage Change Calculator
Calculate percentage increase, decrease, and 4 other percent operations instantly.
Permutation Calculator
Pixel to Inches Converter
Pomodoro Timer
Focus timer using the Pomodoro Technique — 25-minute work sessions with short and long breaks.
Pregnancy Calculator
Calculate your due date, pregnancy week, and key milestones from your last menstrual period.
Prime Number Checker
Check if a number is prime, find prime ranges, GCD, LCM, and Goldbach conjecture.
Probability Calculator
Quadratic Equation Solver
Solve any quadratic equation ax² + bx + c = 0 with step-by-step working and graph.
Random Animal Generator
Random Country Generator
Random Number Generator
Generate random numbers within any range — single, multiple, unique, or from a custom list.
Random Team Generator
Split a list of names into random teams or groups instantly with custom team sizes.
Reaction Time Test
Measure your reaction time in milliseconds. Click when the screen turns green.
Roman Numeral Converter
Convert numbers to Roman numerals and Roman numerals back to numbers — with notation rules explained.
Rounding Calculator
Scientific Calculator
Full-featured scientific calculator with trigonometry, logarithms, powers, and constants.
Significant Figures Calculator
Round any number to N significant figures and display in scientific notation.
Sleep Calculator
Find the best bedtime or wake-up time based on 90-minute sleep cycles so you wake up feeling refreshed.
Sleep Debt Calculator
Speed Distance Time Calculator
Square Root Calculator
Standard Deviation Calculator
Calculate mean, variance, standard deviation, and full descriptive stats for any dataset.
Statistics Calculator
Calculate mean, median, mode, standard deviation, variance, and more from a list of numbers.
Stopwatch
Precise online stopwatch with lap timing, split recording, and export options.
TDEE Calculator
Calculate your Total Daily Energy Expenditure and daily calorie target for your fitness goal.
Temperature Converter
Convert Celsius, Fahrenheit, Kelvin, and Rankine in real time with a reference table.
Time Calculator
Time Zone Converter
Convert time between any two time zones instantly — perfect for scheduling meetings across countries.
Tip Calculator
Calculate the tip amount and split the bill between any number of people instantly.
Triangle Calculator
Solve any triangle — calculate area, perimeter, angles, and sides from SSS, SAS, or ASA.
Unit Converter
Convert length, weight, temperature, area, volume, speed, time, and data units instantly — all in one free tool.
Water Intake Calculator
Find your daily water intake goal based on weight, activity, and climate.
Weight Loss Calculator
Weighted Average Calculator
Would You Rather
Zodiac Sign Calculator
About Calculators Tools
The Calculators category brings together the most commonly needed mathematical and date-based calculation tools, all designed to deliver instant, accurate results. Percentage calculations come up everywhere — computing a discount amount, analyzing a percentage change in revenue, finding what portion one number is of another, or splitting a restaurant bill with a tip. Our Percentage Calculator handles all four of these scenarios with dedicated modes, so you always have the right formula without any mental gymnastics. The Age Calculator goes far beyond simply telling you how old you are — it calculates your exact age in years, months, and days, shows your total days and hours lived, identifies your Western zodiac sign, and counts down to your next birthday. You can change the reference date to calculate how old you will be on any future date, or how old you were on a specific historical date. More calculators are being added regularly, covering unit conversion, date difference calculation, BMI, and scientific calculations. Every tool in this category processes data locally in your browser — no personal information is ever transmitted or stored anywhere.
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