Free Online Calculators

104 free tools: finance, health, math, dates, cooking and unit conversions. Pick one below, it runs right in your browser.

Conversions

• Oz to ML: Convert fluid ounces (oz) to milliliters (ml)
• Kg to Lbs: Convert kilograms (kg) to pounds (lbs)
• ML to Oz: Convert milliliters (ml) to fluid ounces (oz)
• Lbs to Kg: Convert pounds (lbs) to kilograms (kg)
• Celsius to Fahrenheit: Convert Celsius (°C) to Fahrenheit (°F)
• Fahrenheit to Celsius: Convert Fahrenheit (°F) to Celsius (°C)
• Miles to Kilometers: Convert miles to kilometers
• Kilometers to Miles: Convert kilometers to miles
• Inches to Centimeters: Convert inches to centimeters
• Centimeters to Inches: Convert centimeters to inches
• Feet to Meters: Convert feet to meters
• Meters to Feet: Convert meters to feet
• Gallons to Liters: Convert gallons to liters
• Liters to Gallons: Convert liters to gallons
• Square Feet to Square Meters: Convert square feet to square meters
• Square Meters to Square Feet: Convert square meters to square feet
• Acres to Hectares: Convert acres to hectares
• Hectares to Acres: Convert hectares to acres
• MPH to KPH: Convert miles per hour to kilometers per hour
• KPH to MPH: Convert kilometers per hour to miles per hour
• Cups to ML: Convert cups to milliliters
• ML to Cups: Convert milliliters to cups
• Tablespoons to ML: Convert tablespoons to milliliters
• ML to Tablespoons: Convert milliliters to tablespoons
• Teaspoons to ML: Convert teaspoons to milliliters
• ML to Teaspoons: Convert milliliters to teaspoons
• Grams to Ounces: Convert grams to ounces
• Ounces to Grams: Convert ounces to grams
• Pounds to Grams: Convert pounds to grams
• Grams to Pounds: Convert grams to pounds
• Stones to Kg: Convert stones to kilograms
• Kg to Stones: Convert kilograms to stones

Finance

• Tip Calculator: Calculate tip amounts and split bills
• Mortgage Calculator: Calculate mortgage payments, interest, and amortization
• Loan Calculator: Calculate loan payments, interest, and amortization schedule
• Compound Interest Calculator: Calculate compound interest for savings and investments
• Retirement Calculator: Plan for retirement with savings and withdrawal projections
• 401k Calculator: Project your 401k growth and retirement savings
• ROI Calculator: Calculate return on investment for business decisions
• Sales Tax Calculator: Calculate sales tax and total price
• VAT Calculator: Calculate Value Added Tax for goods and services
• Income Tax Calculator: Estimate income tax based on earnings and deductions
• Currency Converter: Convert between different currencies with up-to-date rates
• Margin Calculator: Calculate profit margins for business pricing
• Discount Calculator: Calculate discounts, sale prices, and savings
• Paycheck Calculator: Calculate net pay after taxes and deductions
• Debt Payoff Calculator: Plan your debt payoff strategy and timeline

Math

• Grade Calculator: Calculate final grades based on assignments and weights
• Percentage Calculator: Calculate percentages, increases, and decreases
• Fraction Calculator: Add, subtract, multiply, and divide fractions
• Scientific Calculator: Perform scientific calculations with advanced functions
• Exponent Calculator: Calculate powers and exponents easily
• Square Root Calculator: Calculate square roots and other nth roots
• Pythagorean Theorem: Calculate the sides of a right triangle
• Quadratic Equation Solver: Solve quadratic equations and find roots
• Mean, Median, Mode Calculator: Calculate statistical measures of central tendency
• Prime Number Checker: Check if a number is prime and find prime factors
• GCD & LCM Calculator: Find greatest common divisor and least common multiple
• Binary Calculator: Convert between decimal, binary, octal, and hexadecimal
• Standard Deviation Calculator: Calculate standard deviation and variance of a data set
• Ratio Calculator: Calculate ratios, proportions, and equivalent ratios
• Age Calculator: Calculate exact age between two dates
• Date Calculator: Add or subtract days, months, years from a date
• Random Number Generator: Generate random numbers within a specified range
• GPA Calculator: Calculate Grade Point Average for students

Fun

• Real Age Calculator: Discover your biological age based on lifestyle factors
• Personality Type Test: Discover your personality type and traits
• Love Calculator: Test compatibility between two names for fun
• IQ Test: Take a quick IQ assessment for fun

Health

• BMI Calculator: Calculate your Body Mass Index and weight status
• Calorie Calculator: Calculate daily caloric needs based on activity level
• Macro Calculator: Calculate macronutrient ratios for your diet plan
• Body Fat Calculator: Estimate body fat percentage using measurements
• Ideal Weight Calculator: Calculate ideal weight based on height and body frame
• Pregnancy Calculator: Calculate due date and pregnancy milestones
• Ovulation Calculator: Track menstrual cycle and predict ovulation
• Pace Calculator: Calculate running pace, time, and distance
• 1RM Calculator: Calculate one-rep max for weightlifting
• Water Intake Calculator: Calculate recommended daily water intake
• Carb Counter: Track carbohydrate intake for meals and recipes
• Heart Rate Zone Calculator: Calculate target heart rate zones for exercise

Geometry

• Area Calculator: Calculate area of various shapes
• Volume Calculator: Calculate volume of 3D shapes
• Circle Calculator: Calculate area, circumference, diameter of circles
• Triangle Calculator: Calculate properties of triangles
• Rectangle Calculator: Calculate properties of rectangles
• Sphere Calculator: Calculate volume and surface area of spheres
• Cylinder Calculator: Calculate volume and surface area of cylinders
• Cone Calculator: Calculate volume and surface area of cones
• Right Triangle Calculator: Calculate sides and angles of right triangles
• Trapezoid Calculator: Calculate area and perimeter of trapezoids

Statistics

• Probability Calculator: Calculate probabilities of events
• Z-Score Calculator: Calculate z-scores and probabilities
• Confidence Interval Calculator: Calculate confidence intervals for population parameters
• Sample Size Calculator: Calculate required sample size for research
• Correlation Calculator: Calculate correlation coefficient between variables
• Regression Calculator: Calculate linear regression and trend lines
• Normal Distribution Calculator: Calculate probabilities for normal distributions
• Chi-Square Calculator: Calculate chi-square test for independence

Time

• Time Calculator: Add or subtract hours, minutes, and seconds
• Time Zone Converter: Convert time between different time zones
• Days Between Dates: Calculate the number of days between two dates
• Working Days Calculator: Calculate working days between dates (excluding weekends/holidays)
• Countdown Calculator: Calculate time remaining until a specified date

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