🔢 Calculators
166 free tools available
BMI Calculator
Calculate your Body Mass Index instantly
Percentage Calculator
Calculate any percentage problem easily
Age Calculator
Calculate your exact age in years, months, and days
Tip Calculator
Calculate tips and split bills easily
Compound Interest Calculator
See how your money grows over time
Time Calculator
Add or subtract hours, minutes, seconds
Fraction Calculator
Calculate fractions with step-by-step solutions
GPA Calculator
Calculate your grade point average
Calorie Calculator
Calculate daily calorie needs (TDEE & BMR)
Discount Calculator
Calculate sale price and savings
Sales Tax Calculator
Calculate sales tax and total price
Mortgage Calculator
Calculate monthly mortgage payments
Square Footage Calculator
Calculate area in square feet
Loan Calculator
Calculate loan payments and total interest
Percentage Change Calculator
Calculate percentage increase or decrease between values
Decimal to Fraction Calculator
Convert decimals to simplified fractions
Scientific Notation Calculator
Convert and calculate with scientific notation
Significant Figures Calculator
Count and round significant figures
Quadratic Formula Calculator
Solve quadratic equations step by step
Pythagorean Theorem Calculator
Find the missing side of a right triangle
Slope Calculator
Calculate slope from two points
Long Division Calculator
Long division with step-by-step work
Standard Deviation Calculator
Calculate standard deviation and variance
Mean Median Mode Calculator
Find mean, median, mode, and range of data
BMR Calculator
Calculate your basal metabolic rate
Body Fat Calculator
Estimate body fat percentage
Macro Calculator
Calculate daily protein, carb, and fat targets
Hourly to Salary Calculator
Convert hourly wage to annual salary
Salary to Hourly Calculator
Convert annual salary to hourly rate
Simple Interest Calculator
Calculate simple interest on any amount
ROI Calculator
Calculate return on investment percentage
Logarithm Calculator
Calculate logarithms with any base
Factorial Calculator
Calculate n!, double factorial, and subfactorial
Midpoint Calculator
Find the midpoint between two points
Distance Calculator
Distance between two points in 2D or 3D
Area Calculator
Calculate area of rectangles, circles, triangles & more
Volume Calculator
Calculate volume of cubes, spheres, cylinders & more
Circumference Calculator
Calculate circle circumference and area
Right Triangle Calculator
Solve right triangles from sides or angles
Circle Calculator
Calculate all circle properties from any one value
Average Calculator
Calculate average, median, min, max of numbers
Weighted Average Calculator
Calculate weighted average from value-weight pairs
Ratio Calculator
Solve ratios and simplify to lowest terms
Proportion Calculator
Solve proportions using cross multiplication
Golden Ratio Calculator
Find golden ratio partners for any number
Calorie Deficit Calculator
Calculate daily calories for weight loss goals
Ideal Weight Calculator
Ideal weight from Devine, Robinson, Miller & Hamwi formulas
Margin Calculator
Calculate profit margin from cost and revenue
Markup Calculator
Calculate markup percentage from cost and price
Profit Margin Calculator
Calculate gross, operating, and net profit margins
Pace Calculator
Calculate running pace, speed, and finish time
Concrete Calculator
Calculate concrete volume needed for your project
Grade Calculator
Calculate weighted grade average for your class
Final Grade Calculator
Find what you need on your final exam
Due Date Calculator
Calculate estimated pregnancy due date
Ovulation Calculator
Calculate your fertile window and ovulation date
Sleep Calculator
Find the best bedtime or wake time for full sleep cycles
BAC Calculator
Estimate blood alcohol concentration from drinks
Water Intake Calculator
Calculate your daily water intake needs
Inflation Calculator
Calculate how inflation affects purchasing power
Aspect Ratio Calculator
Calculate width and height from any aspect ratio
Combination Calculator
Calculate nCr combinations from n items
Permutation Calculator
Calculate nPr permutations from n items
Probability Calculator
Calculate probability of events and outcomes
APY Calculator
Calculate APY from interest rate and compounding
CAGR Calculator
Calculate compound annual growth rate
Future Value Calculator
Calculate future value of investments and savings
Present Value Calculator
Calculate present value of future cash flows
NPV Calculator
Calculate net present value of investment cash flows
Auto Loan Calculator
Calculate monthly car payment and total loan cost
Savings Calculator
Calculate savings growth with deposits and interest
Retirement Calculator
Calculate how much you need to retire
401(k) Calculator
Calculate 401(k) growth with employer match
Credit Card Calculator
Calculate credit card payoff time and interest cost
Amortization Calculator
Generate full loan amortization schedule
Break-Even Calculator
Calculate units or revenue needed to break even
VAT Calculator
Calculate VAT-inclusive and VAT-exclusive prices
Net Worth Calculator
Calculate net worth from assets and liabilities
GCF Calculator
Find the greatest common factor of numbers
LCM Calculator
Find the least common multiple of numbers
Prime Factorization Calculator
Find prime factors of any number
Square Root Calculator
Calculate square roots and nth roots
Exponent Calculator
Calculate powers and exponents (x^n)
Matrix Calculator
Perform matrix operations with step-by-step solutions
Lean Body Mass Calculator
Calculate your lean body mass (fat-free weight)
Waist-to-Hip Ratio Calculator
Calculate waist-to-hip ratio for health assessment
Heart Rate Zone Calculator
Calculate target heart rate training zones
One Rep Max Calculator
Estimate your one rep max from weight and reps
Walking Calorie Calculator
Calculate calories burned walking
Running Calorie Calculator
Calculate calories burned running
Steps to Miles Calculator
Convert steps to miles, km, and calories
Protein Calculator
Calculate daily protein requirements
Mulch Calculator
Calculate mulch volume and bags needed
Gravel Calculator
Calculate gravel volume and weight needed
Paint Calculator
Calculate gallons of paint needed for a room
Tile Calculator
Calculate number of tiles needed with waste factor
Board Foot Calculator
Calculate board feet for lumber projects
Roof Pitch Calculator
Calculate roof pitch, angle, and rafter length
Fence Calculator
Calculate fence posts, rails, and pickets needed
Tank Volume Calculator
Calculate tank volume in gallons and liters
Ohm's Law Calculator
Calculate V, I, R using Ohm's Law
Density Calculator
Calculate density, mass, or volume (d = m/V)
Force Calculator (F=ma)
Calculate force using Newton's Second Law
Velocity Calculator
Calculate velocity, distance, or time (v = d/t)
Acceleration Calculator
Calculate acceleration from velocity or force
Kinetic Energy Calculator
Calculate kinetic energy (KE = ½mv²)
Momentum Calculator
Calculate momentum and impulse
Wavelength Calculator
Calculate wavelength, frequency, and period
Resistor Color Code Calculator
Decode resistor color bands to resistance value
LED Resistor Calculator
Calculate resistor needed for LED circuits
Voltage Divider Calculator
Calculate voltage divider output voltage
Molarity Calculator
Calculate molarity, moles, or volume (M = n/V)
pH Calculator
Calculate pH, pOH, and ion concentrations
Dilution Calculator (C1V1=C2V2)
Calculate dilutions using C1V1 = C2V2
Instagram Engagement Calculator
Calculate Instagram engagement rate
TikTok Engagement Calculator
Calculate TikTok engagement rate
YouTube Earnings Calculator
Estimate YouTube ad earnings
CTR Calculator
Calculate click-through rate
Turkey Cooking Calculator
Calculate turkey cooking time by weight
Recipe Scaler
Scale recipe ingredients up or down
Coffee Ratio Calculator
Find the perfect coffee-to-water ratio
Pizza Dough Calculator
Calculate pizza dough ingredients
Rice Water Ratio Calculator
Find the right water for any rice
Sourdough Calculator
Calculate sourdough bread ingredients
Z-Score Calculator
Calculate z-scores and probabilities
Confidence Interval Calculator
Calculate confidence intervals
P-Value Calculator
Calculate p-values from test statistics
Chi-Square Calculator
Calculate chi-square test statistics
Sample Size Calculator
Calculate required survey sample size
Normal Distribution Calculator
Calculate normal distribution probabilities
Binomial Distribution Calculator
Calculate binomial probabilities
Bayes' Theorem Calculator
Calculate Bayesian posterior probabilities
Rectangle Calculator
Calculate rectangle area and perimeter
Triangle Calculator
Calculate triangle properties
Sphere Calculator
Calculate sphere volume and surface area
Cylinder Calculator
Calculate cylinder volume and surface area
Cone Calculator
Calculate cone volume and surface area
Molar Mass Calculator
Calculate molar mass from a formula
Half-Life Calculator
Calculate radioactive half-life decay
Dog Age Calculator
Convert dog years to human years accurately
Cat Age Calculator
Convert cat years to human years
Dog Food Calculator
Find the right daily food amount for your dog
Chocolate Toxicity Calculator
Check if chocolate is toxic for your dog
Puppy Weight Predictor
Estimate your puppy's adult weight
D&D Encounter Calculator
Balance D&D combat encounters by difficulty
Poker Odds Calculator
Calculate poker hand odds and equity
Elo Rating Calculator
Calculate Elo rating changes after a match
BPM Calculator
Tap to find beats per minute of any song
IP Subnet Calculator
Calculate subnets, CIDR, and IP ranges
Depreciation Calculator
Calculate asset depreciation schedules
Debt to Equity Calculator
Calculate debt-to-equity ratio for financial analysis
Dividend Calculator
Project dividend income and reinvestment growth
Stock Return Calculator
Calculate total stock investment returns
Emergency Fund Calculator
Calculate your ideal emergency fund target
Property Tax Calculator
Estimate annual property taxes on your home
Rent vs Buy Calculator
Compare renting vs buying a home financially
Investment Calculator
Project investment growth with compound interest
Lottery Tax Calculator
Calculate taxes on lottery winnings
Overtime Calculator
Calculate overtime pay and total earnings
Pay Raise Calculator
See how a raise affects your salary and paycheck
VO2 Max Calculator
Estimate your VO2 max and aerobic fitness level
Bench Press Calculator
Estimate your bench press one-rep max
Batting Average Calculator
Calculate batting average and other hitting stats
Steps to Calories Calculator
Convert steps walked into calories burned
Bike Size Calculator
Find the right bike frame size for your body
Hiking Calculator
Estimate hiking time, calories, and water needs