All Calculators
140 free calculators, organized by category. No registration needed.
Finance Calculators
ROI, EMI, mortgage, compound interest & more.
ROI Calculator
Calculate return on investment and measure the profitability of any investment.
EMI Calculator
Calculate your monthly EMI for home, car, or personal loans instantly.
Mortgage Calculator
Estimate monthly mortgage payments including principal, interest, taxes, and insurance.
Compound Interest Calculator
See how your investments grow over time with the power of compounding.
SIP Calculator
Calculate returns on your Systematic Investment Plan (SIP) investments.
Loan Calculator
Calculate monthly payments, total interest, and amortization schedule for any loan.
Simple Interest Calculator
Calculate simple interest on any principal amount, rate, and time period.
SWP Calculator
Calculate how long your corpus lasts with a Systematic Withdrawal Plan.
Retirement Calculator
Plan your retirement by calculating how much you need to save each month.
Personal Loan Calculator
Calculate monthly payments, total interest, and amortization for personal loans.
Car Loan Calculator
Calculate your monthly car loan payment, total interest, and payoff schedule.
Home Loan Calculator
Calculate monthly home loan EMI, total interest payable, and repayment schedule.
Credit Card Payoff Calculator
Calculate how long it takes to pay off your credit card balance and total interest paid.
Debt Payoff Calculator
Calculate a debt payoff plan using avalanche or snowball method.
Refinance Calculator
Calculate potential savings when refinancing your mortgage or auto loan.
Savings Calculator
Calculate how much your savings will grow with regular deposits and compound interest.
Inflation Calculator
Calculate the real value of money over time accounting for inflation rate.
Investment Return Calculator
Calculate total return, CAGR, and inflation-adjusted return on any investment.
Future Value Calculator
Calculate the future value of a lump sum or regular investment at a given rate.
Present Value Calculator
Calculate the present value of a future sum of money using a discount rate.
Net Worth Calculator
Calculate your total net worth by adding assets and subtracting liabilities.
FIRE Calculator
Calculate your FIRE number and years to financial independence using the 4% rule.
APY Calculator
Calculate Annual Percentage Yield (APY) from nominal interest rate and compounding frequency.
APR Calculator
Calculate Annual Percentage Rate (APR) including fees to find the true cost of a loan.
Dividend Yield Calculator
Calculate dividend yield, annual dividend income, and dividend payout ratio.
Stock Average Calculator
Calculate average cost per share when buying stocks at different prices.
Cryptocurrency Profit Calculator
Calculate profit, loss, and ROI on cryptocurrency trades including fees.
Forex Profit Calculator
Calculate profit or loss in pips and currency for forex trades.
Trading Risk Calculator
Calculate risk per trade, risk-reward ratio, and expected value of trades.
Position Size Calculator
Calculate the correct position size based on account size, risk percentage, and stop loss.
Margin Calculator
Calculate margin required, leverage, and margin level for trading positions.
Profit & Loss Calculator
Calculate profit or loss on any trade including entry price, exit price, and fees.
Business Calculators
Profit margin, GST, discount & business tools.
GST Calculator
Calculate GST inclusive and exclusive amounts for any tax rate instantly.
Profit Margin Calculator
Calculate gross and net profit margins for your products and services.
Discount Calculator
Calculate the final price after discount, or find the original price.
Break-even Calculator
Calculate break-even point in units and revenue for any product or business.
VAT Calculator
Add or remove VAT from any price. Calculate VAT amount and net/gross price instantly.
Sales Tax Calculator
Calculate sales tax amount and total price for any US state or custom tax rate.
Markup Calculator
Calculate selling price, markup percentage, or cost price for any product.
Commission Calculator
Calculate sales commission earnings for flat rate, tiered, and split commission structures.
Revenue Calculator
Calculate total revenue, average revenue per unit, and revenue growth rate.
Inventory Calculator
Calculate inventory value, reorder point, economic order quantity (EOQ), and stock turnover.
Salary Calculator
Convert salary between hourly, daily, weekly, monthly, and yearly amounts.
Overtime Calculator
Calculate overtime pay for weekly, daily, or double-time overtime rates.
Payroll Calculator
Calculate employee net pay after federal tax, state tax, Social Security, and Medicare deductions.
Invoice Calculator
Create and calculate invoices with line items, tax, discount, and due date.
Freelance Rate Calculator
Calculate your minimum freelance hourly rate based on desired income, expenses, and billable hours.
Hourly Wage Calculator
Calculate hourly wage from salary, or convert hourly pay to annual, monthly, and weekly income.
Business Loan Calculator
Calculate monthly repayment, total interest, and amortization schedule for a business loan.
Cash Flow Calculator
Calculate net cash flow, operating cash flow, and free cash flow from income and expenses.
Startup Cost Calculator
Estimate total startup costs including one-time setup costs and monthly operating expenses.
Employee Cost Calculator
Calculate the true total cost of hiring an employee including salary, benefits, taxes, and overhead.
Math Calculators
Percentage, algebra, geometry & arithmetic.
Percentage Calculator
Calculate percentages, percentage change, and percentage of a number easily.
Fraction Calculator
Add, subtract, multiply, and divide fractions. Simplify fractions and convert to decimals.
Scientific Calculator
Full-featured scientific calculator with trigonometry, logarithms, and advanced math functions.
Algebra Calculator
Solve algebraic expressions and evaluate equations step by step.
Equation Solver
Solve linear and quadratic equations for x step by step.
Quadratic Formula Calculator
Solve quadratic equations axΒ² + bx + c = 0 using the quadratic formula.
Matrix Calculator
Add, subtract, multiply matrices and calculate determinant and transpose.
Exponent Calculator
Calculate exponents, powers, and scientific notation instantly.
Logarithm Calculator
Calculate log base 10, natural log (ln), log base 2, and any custom base.
Root Calculator
Calculate square root, cube root, and nth root of any number.
Polynomial Calculator
Add, subtract, and multiply polynomials. Evaluate polynomials at given values.
Trigonometry Calculator
Calculate sin, cos, tan, and their inverses in degrees or radians.
Geometry Calculator
Calculate area, perimeter, volume and other properties of geometric shapes.
Area Calculator
Calculate the area of any shape β circle, triangle, rectangle, trapezoid, and more.
Volume Calculator
Calculate the volume of 3D shapes β cube, sphere, cylinder, cone, and more.
Perimeter Calculator
Calculate the perimeter or circumference of any shape easily.
Circle Calculator
Calculate the area, circumference, diameter, and radius of any circle.
Triangle Calculator
Calculate the area, perimeter, angles, and sides of any triangle.
Pythagorean Theorem Calculator
Calculate the missing side of a right triangle using the Pythagorean theorem.
Slope Calculator
Calculate slope, y-intercept, angle, and line equation from two points.
Distance Calculator
Calculate the distance between two points using the distance formula.
Statistics Calculators
Mean, standard deviation, probability & more.
Standard Deviation Calculator
Calculate mean, variance, and standard deviation for any data set.
Mean Calculator
Calculate arithmetic mean, geometric mean, and harmonic mean for any data set.
Median Calculator
Find the median (middle value) of any data set, sorted and unsorted.
Mode Calculator
Find the mode (most frequent value) of any data set, including multimodal sets.
Variance Calculator
Calculate population and sample variance for any data set.
Probability Calculator
Calculate basic probability, combined events, and conditional probability.
Z-score Calculator
Calculate z-score (standard score) and find corresponding probabilities.
Percentile Calculator
Calculate percentile rank and find the value at any percentile in a data set.
Sample Size Calculator
Calculate the required sample size for surveys and statistical studies.
Correlation Calculator
Calculate Pearson correlation coefficient between two variables.
Regression Calculator
Calculate linear regression equation, slope, and intercept for any data set.
Confidence Interval Calculator
Calculate confidence intervals for means and proportions.
Permutation Calculator
Calculate the number of permutations P(n,r) β ordered arrangements.
Combination Calculator
Calculate the number of combinations C(n,r) β unordered selections.
Binomial Distribution Calculator
Calculate binomial probability P(X=k), cumulative probabilities, mean, and variance.
Health Calculators
BMI, calorie, heart rate & fitness calculators.
BMI Calculator
Calculate your Body Mass Index (BMI) and find out your weight category.
Calorie Calculator
Calculate your daily calorie needs based on age, gender, height, weight, and activity level.
BMR Calculator
Calculate your Basal Metabolic Rate β the calories your body burns at rest.
Body Fat Calculator
Calculate your body fat percentage using the US Navy method or BMI method.
Water Intake Calculator
Calculate your daily water intake needs based on weight, activity, and climate.
Protein Intake Calculator
Calculate your daily protein needs based on weight, activity level, and fitness goal.
Pregnancy Calculator
Calculate your due date, conception date, and pregnancy milestones.
Ovulation Calculator
Calculate your ovulation date and fertile window based on your cycle.
Ideal Weight Calculator
Calculate your ideal body weight range based on height, gender, and frame size.
Heart Rate Calculator
Calculate your maximum heart rate and target heart rate zones for exercise.
Blood Alcohol Calculator
Estimate your Blood Alcohol Content (BAC) based on drinks, weight, and time.
Macro Calculator
Calculate your daily macronutrient targets β protein, carbs, and fat β for your goal.
TDEE Calculator
Calculate your Total Daily Energy Expenditure β how many calories you burn per day.
Lean Body Mass Calculator
Calculate your lean body mass β total weight minus body fat.
Calories Burned Calculator
Calculate calories burned during exercise based on activity, weight, and duration.
Engineering Calculators
Unit conversion, electrical, civil & more.
Density Calculator
Calculate density, mass, or volume using the density formula D = M/V.
Pipe Weight Calculator
Calculate the weight of steel, PVC, or other pipe by outer diameter, thickness, and length.
Concrete Calculator
Estimate concrete volume and bags needed for slabs, footings, columns, and walls.
Steel Weight Calculator
Calculate the weight of steel bars, plates, pipes, and sections by dimensions.
Voltage Calculator
Calculate voltage using Ohm's Law (V = IR) or power equations (V = P/I).
Ohm's Law Calculator
Calculate voltage, current, resistance, or power using Ohm's Law and Watt's Law.
Watt Calculator
Calculate electrical power in watts from voltage and current, or resistance and voltage.
Resistance Calculator
Calculate total resistance for series and parallel resistor circuits.
Power Consumption Calculator
Estimate electricity cost by entering device wattage, usage hours, and electricity rate.
Fuel Consumption Calculator
Calculate fuel consumption rate, total fuel used, and fuel efficiency in L/100km or MPG.
Speed Calculator
Calculate speed, distance, or time using the formula Speed = Distance / Time.
Force Calculator
Calculate force, mass, or acceleration using Newton's Second Law (F = ma).
Torque Calculator
Calculate torque from force and lever arm length, or convert between torque units.
Pressure Calculator
Calculate pressure from force and area, or convert between pressure units.
Area Conversion Calculator
Convert between area units: sq meters, sq feet, acres, hectares, sq km, and more.
Unit Conversion Calculator
Convert between length, weight, temperature, volume, speed, and other units.
Material Cost Calculator
Estimate total material cost for construction or manufacturing projects by quantity and unit price.
Load Calculator
Calculate structural loads including dead load, live load, and total load per unit area.
Beam Deflection Calculator
Calculate beam deflection and bending stress for simply supported and cantilever beams.
Daily Life Calculators
Age, date, fuel cost, tip & everyday tools.
Age Calculator
Calculate your exact age in years, months, days, hours, and minutes.
Fuel Cost Calculator
Calculate fuel cost for any trip based on distance, mileage, and fuel price.
Date Difference Calculator
Find the exact difference between two dates in days, weeks, months, and years.
Tip Calculator
Calculate tip amount, total bill, and split between any number of people instantly.
Time Zone Calculator
Convert time between any two time zones instantly with current DST support.
Currency Converter
Convert between 30+ world currencies with up-to-date exchange rates.
Time Calculator
Add or subtract time values, convert between time units, and calculate duration between two times.
Travel Budget Calculator
Plan your travel budget by estimating costs for flights, hotels, food, transport, and activities.
Sleep Calculator
Find the best bedtime or wake-up time based on 90-minute sleep cycles for optimal rest.
Love Calculator
Calculate love compatibility between two people based on names for fun.
Countdown Calculator
Calculate the exact number of days, hours, minutes, and seconds until any future event.
GPA Calculator
Calculate your GPA on a 4.0, 5.0, or 10.0 scale from your grades and credit hours.
Grade Calculator
Calculate your final grade from assignments and tests using weighted averages.
Random Number Generator
Generate random numbers within any range, or pick random items from a list.
Password Generator
Generate strong, secure random passwords with custom length and character options.
Unit Converter
Quickly convert everyday units: length, weight, temperature, volume, and speed.
BMI by Age Calculator
Calculate BMI adjusted for age and gender with healthy weight range recommendations.
Birthday Countdown Calculator
Find out exactly how many days, hours, and minutes until your next birthday or any special date.