Calculators & Converters
Powerful calculators and unit converters for everyday needs. Unit conversions, business calculators, and utilities.
Length Converter
Convert between meters, feet, inches, kilometers, and more
Weight Converter
Convert between kilograms, pounds, ounces, and more
Temperature Converter
Convert between Celsius, Fahrenheit, and Kelvin
Volume Converter
Convert between liters, gallons, cups, and more
Data Size Converter
Convert between bytes, KB, MB, GB, and TB
VAT Calculator
Calculate VAT/GST quickly and easily
Profit Margin Calculator
Calculate profit margins and markups
Discount Calculator
Calculate discounts and final prices
Invoice Generator
Create professional invoices instantly
Project Time Tracker
Track time across projects and calculate earnings
Quote Generator
Create professional quotes and proposals with PDF export
Expense Tracker
Track and categorize expenses with charts and CSV export
Advanced Profit Calculator
Calculate EBITDA, operating profit, net profit with break-even and scenario analysis
Timezone Converter
Convert times between different timezones
Tip Calculator
Calculate tips and split bills between multiple people
Receipt Generator
Create professional receipts for completed transactions
Percentage Calculator
Calculate percentages with 4 different modes
BMI Calculator
Calculate your Body Mass Index with metric or imperial units
BMR/TDEE Calculator
Calculate your basal metabolic rate and daily calorie needs
Body Fat Calculator
Calculate your body fat percentage using US Navy method or BMI
Calorie Calculator
Calculate daily calorie needs, track food intake, and browse 50+ common foods
Random Number Generator
Generate random numbers with presets for dice, coins, lottery, and more
Age Calculator
Calculate your exact age in years, months, days, hours, and more
Loan Calculator
Calculate loan payments and amortization schedules with detailed breakdowns
Mortgage Calculator
Calculate mortgage payments with PITI breakdown and amortization schedule
Compound Interest Calculator
Calculate investment growth with compound interest and regular contributions
Date Difference Calculator
Calculate the number of days, weeks, months, and years between two dates
Speed Converter
Convert between mph, km/h, knots, m/s and other speed units
Area Converter
Convert between square meters, square feet, acres, hectares and more
Time Converter
Convert between seconds, minutes, hours, days, weeks, months, years
Angle Converter
Convert between degrees, radians, gradians, and other angle units
Energy Converter
Convert between joules, calories, kilowatt-hours, BTU, and more energy units
Power Converter
Convert between watts, kilowatts, horsepower, BTU/hour, and more power units
Pressure Converter
Convert between PSI, bar, pascal, atmosphere, torr, and more pressure units
Days Calculator
Calculate days until or since any event. Countdown to weddings, birthdays, and more.
ROI Calculator
Calculate return on investment with simple, marketing, and comparison modes
Break-Even Calculator
Calculate break-even point with profit planning and margin of safety analysis
Macro Calculator
Calculate optimal protein, carbs, and fat intake based on your calorie goals and diet strategy
GPA Calculator
Calculate your semester or cumulative GPA with support for 4.0, weighted, and plus/minus scales
Grade Calculator
Calculate what grade you need on your final exam to reach your target grade
Recipe Scaler
Scale recipe ingredients up or down for any serving size
Cooking Measurement Converter
Convert between cups, grams, tablespoons, ounces, and temperature
Business Days Calculator
Calculate working days between dates with holiday support for multiple countries
Average Calculator
Calculate mean, median, mode, and more statistics
Scientific Calculator
Advanced calculator with trigonometry, logarithms, and scientific functions
Ideal Weight Calculator
Calculate your ideal body weight using medical formulas
Event Countdown Timer
Count down to birthdays, weddings, holidays, and special events
Fuel Efficiency Converter
Convert between MPG, L/100km, km/L, and more
Salary Calculator
Convert salary between hourly, monthly, yearly, and more
Debt Payoff Calculator
Calculate your debt payoff timeline using the snowball or avalanche method
50/30/20 Budget Calculator
Plan your budget using the popular 50/30/20 budgeting rule
Pace Calculator
Calculate running pace, time, or distance for training and races
Water Intake Calculator
Calculate your daily water intake needs based on weight and activity
Meeting Cost Calculator
Calculate the true cost of meetings based on attendee salaries
Fraction Calculator
Add, subtract, multiply, and divide fractions with step-by-step solutions
Mean, Median, Mode Calculator
Calculate mean, median, mode, standard deviation, and more statistics
Percentage Change Calculator
Calculate percentage increase or decrease between two values
Sleep Calculator
Calculate optimal sleep and wake times based on sleep cycles
Pregnancy Due Date Calculator
Calculate your due date and pregnancy milestones
One Rep Max Calculator
Calculate your estimated one rep max (1RM) for any lift
Savings Goal Calculator
Calculate how much to save monthly to reach your financial goal
Investment Return Calculator
Calculate potential returns and growth of your investments
Hourly to Salary Converter
Convert between hourly wages and annual salary
Prime Number Checker
Check if a number is prime, get factorization, and generate prime numbers
Combinations & Permutations Calculator
Calculate nCr combinations, nPr permutations, and factorials with step-by-step solutions
Quadratic Equation Solver
Solve ax² + bx + c = 0 quadratic equations with step-by-step solutions and graph
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