Simple Calculator
Use our free, simple online scientific calculator to solve basic arithmetic, algebra, percentages, and complex math equations instantly with steps.
Percentage Calculator
Calculate percentages easily. Find what percent a number is of another, compute percentage increases, percentage decreases, and fractional shares instantly.
BMI Calculator
Calculate your Body Mass Index (BMI) instantly. Supports Metric & Imperial units. Includes classifications, weight guidelines, and expert medical sources.
Mortgage Calculator
Calculate your monthly mortgage payments. Estimate principal, interest, taxes, home insurance (PITI), and review a complete amortization schedule.
Age Calculator
Calculate your exact age today or at any specific date. See your age in years, months, weeks, days, hours, minutes, and seconds instantly.
EMI Loan Calculator
Calculate your Equated Monthly Installment (EMI) for home, car, or personal loans. See total interest payable and an elegant amortization schedule.
Tip Calculator
Calculate tips quickly. Split the bill among friends, adjust tip percentages, round results, and see exact payments per person with a clean interface.
Income Tax Calculator
Estimate your federal income tax obligation. Enter your gross income and select bracket types to estimate taxable liability.
Days Between Dates
Count the exact number of days, weeks, or months between any two calendar dates with options to include or exclude the start day.
Universal Unit Converter
Convert between metric and imperial systems instantly. Fast conversion for lengths, weight, temperatures, volumes, and common daily units.
BMR Calculator
Calculate your Basal Metabolic Rate (BMR) using Mifflin-St Jeor and Harris-Benedict formulas. Find your baseline caloric needs for weight management.
Body Fat Calculator
Calculate your body fat percentage using the standard US Navy Circumference method. Includes body composition classifications and healthy ranges.
Loan Calculator
Calculate monthly payments for auto loans, personal loans, or general mortgages. See interest savings from extra payments with a full schedule.
Date Adder
Add or subtract days, weeks, months, or years to any calendar date. Find target milestones, project deadline offsets, and event dates instantly.
GPA Calculator
Calculate your high school or college GPA. Supports weighted/unweighted scores, letter grades, percentage mappings, and multi-semester tracking.
Ratio Calculator
Solve, simplify, or scale ratios and proportions. Find missing values in A:B = C:D structures, or reduce ratios to simplest forms instantly.
Calorie Calculator
Calculate your daily caloric needs for weight maintenance, loss, or gain. Estimates TDEE based on age, gender, activity level, and goals.
Compound Interest Calculator
Calculate your future investment value. See the power of compounding with monthly deposits, customized compound frequencies, and visual projection charts.
Word Counter
Count words, characters, sentences, and paragraphs in real-time. Estimate reading times, speaking times, and evaluate text composition.
Quadratic Equation Solver
Solve quadratic equations in ax² + bx + c = 0 form. Find real and complex roots, calculate the discriminant, and view step-by-step algebraic factoring.
Salary Converter
Convert annual, monthly, weekly, or hourly wage rates. See equivalent payroll breakdowns and hours-per-week adjustments instantly.
Pregnancy Due Date
Calculate your estimated due date (EDD) using Last Menstrual Period (LMP) or Conception methods. Track weekly milestones and trimesters.
Inflation Calculator
Calculate purchasing power differences between 1970 and 2026 using real historic US CPI data, or enter a custom rate.
Base Converter
Convert values between binary, octal, decimal, hexadecimal, and custom bases (2 to 36) with standard formatting step-by-step.
Leap Year Calculator
Check if any year is a leap year. Read standard Gregorian criteria and list nearby leap years step-by-step.
Markup & Margin
Solve for retail gross margin, markup, cost, and selling price. Input any two parameters to compute complete sales metrics.
Discount & Sales Tax
Calculate final prices after store discounts, stacked promotions, and localized sales tax. See exact cash savings.
Standard Deviation
Calculate standard deviation, variance, mean, median, count, and range for any sample or population dataset with complete steps.
Significant Figures & Notation
Determine the count of significant figures in any number and convert numbers to scientific notation with rule analyses.
Random Generator
Generate sets of random numbers, flip coins, roll dice, and pick or shuffle customized items instantly.