All Online Calculators
Search and browse our complete library of financial, mathematical, health, fitness, time, and conversion calculators.
Mortgage Calculator
Calculate your monthly mortgage payments including principal, interest, property taxes, home insurance, and PMI with our free mortgage calculator.
Loan & EMI Calculator
Calculate monthly EMI, total interest payable, and overall loan repayment cost for personal loans, business loans, and car loans.
Compound Interest Calculator
Calculate compound interest on your investments or savings with regular monthly deposits, flexible compounding frequencies, and growth breakdown charts.
Auto Loan Calculator
Calculate monthly car loan payments, sales tax, trade-in value, and total financing costs with our easy auto loan calculator.
Retirement & 401(k) Calculator
Plan your retirement with our free 401(k) and IRA calculator. Estimate your future nest egg, monthly retirement income, and inflation-adjusted purchasing power.
Salary & Hourly Wage Calculator
Convert between hourly wages and annual salary. Calculate daily, weekly, bi-weekly, and monthly earnings with overtime support.
Sales Tax & GST Calculator
Calculate sales tax, GST, and VAT. Compute gross total with tax added or reverse calculate net price from a tax-inclusive amount.
Discount & Sale Price Calculator
Calculate sale price, total dollar savings, stacked double discounts, and sales tax with our free discount calculator.
Tip & Bill Split Calculator
Calculate restaurant tips, custom gratuity percentages, and split dinner bills evenly among friends with our fast tip calculator.
Profit Margin & Markup Calculator
Calculate gross profit margin, markup percentage, revenue, and product selling price from wholesale cost with our profit margin calculator.
Return on Investment (ROI) Calculator
Calculate Return on Investment (ROI), total net profit, and Compound Annual Growth Rate (CAGR) for stocks, real estate, and business ventures.
Percentage Calculator
Free multi-mode percentage calculator: find what percent of X is Y, percentage increase or decrease, and percentage difference with step-by-step formulas.
Scientific & Basic Calculator
Free full-featured online scientific calculator with trigonometry (sin, cos, tan), radians/degrees toggle, log, ln, square roots, factorials, and history tape.
Fraction & Mixed Number Calculator
Add, subtract, multiply, and divide fractions and mixed numbers. Get simplified fractions, mixed numbers, and decimal equivalents with step-by-step math.
Pythagorean Theorem Calculator
Calculate hypotenuse or missing right triangle legs using the Pythagorean theorem (a² + b² = c²). Includes interior angles, triangle area, and perimeter.
Statistics & Standard Deviation Calculator
Free descriptive statistics calculator. Computes sample & population standard deviation, variance, mean, median, mode, range, and sum for data sets.
BMI (Body Mass Index) Calculator
Calculate your Body Mass Index (BMI) using metric (kg/cm) or imperial (lbs/ft-in). Includes WHO categories, Asian BMI standards, and healthy weight range.
BMR & TDEE Calorie Calculator
Calculate your Basal Metabolic Rate (BMR) and Total Daily Energy Expenditure (TDEE). Find exact calorie targets for weight loss, maintenance, or muscle gain.
Sleep Cycle & Bedtime Calculator
Calculate the best time to go to sleep or wake up based on natural 90-minute sleep cycles. Avoid morning grogginess and sleep inertia.
Running Pace & Speed Calculator
Calculate running pace per km and mile, running speed (mph/kmh), and projected finish times for 5k, 10k, half marathon, and marathon races.
1-Rep Max (1RM) Strength Calculator
Calculate your 1-Rep Max (1RM) for bench press, squat, and deadlift using Brzycki, Epley, and Lander formulas. Includes 1-12 rep percentage chart.
Age Calculator
Calculate your exact chronological age in years, months, days, hours, and seconds from your date of birth. Includes countdown to next birthday.
Date Difference & Duration Calculator
Calculate number of days, weeks, months, business days (workdays), and weekends between any two calendar dates with our free date calculator.
Universal Unit Converter
Free universal unit converter. Convert length, weight, temperature (°C to °F), area, volume, speed, pressure, energy, and digital data storage instantly.
Debt-to-Income (DTI) Calculator
Calculate your front-end and back-end Debt-to-Income (DTI) ratio to check your qualification eligibility for mortgages and auto loans.
Quadratic Equation Solver
Solve quadratic equations ax² + bx + c = 0 instantly. Computes real and complex roots, discriminant, vertex coordinates, and step-by-step factorization.
2D & 3D Geometry Calculator
Calculate area, perimeter, volume, and surface area for circles, triangles, rectangles, spheres, cylinders, and cones.
Prime Number Checker & Factorizer
Test if a number is prime, generate all prime factors, find all divisors, and determine the next prime number with our prime number calculator.
Permutations & Combinations (nPr & nCr)
Calculate permutations nPr (order matters) and combinations nCr (order does not matter) with factorial expansion and step-by-step probability math.
Body Fat Percentage Calculator
Calculate body fat percentage, fat mass, and lean body mass using the scientifically validated US Navy circumference method.
Heart Rate Training Zones Calculator
Calculate your 5 target heart rate training zones using the Karvonen formula and age-predicted Max HR for fat burn, aerobic base, and VO2 max training.
Timesheet & Work Hours Calculator
Calculate total work hours, unpaid lunch breaks, regular hours, 1.5x overtime hours, and gross pay with our easy online timesheet calculator.