Calculator Categories

Basic Calculator

Perform simple arithmetic calculations with ease.

Percentage Calculator

Calculate percentages, increases, decreases, and more.

Scientific Calculator

Advanced calculator with trigonometry, logarithms, and constants.

Fraction Calculator

Add, subtract, multiply, and divide fractions with step-by-step results.

Area Calculator

Calculate areas of circles, rectangles, triangles, and more.

Volume Calculator

Calculate volumes of spheres, cylinders, cones, and other 3D shapes.

Average Calculator

Calculate mean, median, mode, and range of any set of numbers.

GCD & LCM Calculator

Find the Greatest Common Divisor and Least Common Multiple.

Exponent Calculator

Calculate powers, roots, and exponential expressions.

Random Number Generator

Generate random numbers, integers, or sequences within any range.

Rounding Calculator

Round numbers to any decimal place or significant figures.

Triangle Calculator

Solve any triangle — sides, angles, area using law of sines/cosines.

Quadratic Equation Solver

Solve ax²+bx+c=0, find roots, discriminant, and vertex.

Matrix Calculator

Add, subtract, multiply matrices; find determinant and transpose.

Distance Calculator

Distance between two points in 2D or 3D space.

Slope Calculator

Find slope, midpoint, distance, angle, and line equation.

Factor Calculator

Find all factors and prime factorization of any integer.

Algebra Calculator

Solve linear equations ax+b=c or 2×2 systems of equations.

Logarithm Calculator

Calculate log in any base — log₁₀, ln, log₂, or custom.

Circle Calculator

Find radius, diameter, circumference, and area of a circle.

Right Triangle Calculator

Solve right triangles using Pythagorean theorem and trigonometry.

Sequence Calculator

Arithmetic and geometric sequences — terms, sum, nth term.

Roman Numeral Converter

Convert between Arabic numbers and Roman numerals (1–3999).

Concrete Calculator

Calculate concrete volume for slabs, columns, and footings.

Binary Calculator

Arithmetic and bitwise operations in binary, octal, decimal, or hex.

Loan Calculator

Calculate loan payments, interest, and amortization schedules.

Mortgage Calculator

Calculate monthly mortgage payments, total cost, and amortization.

Tip Calculator

Calculate tips and split bills among friends easily.

Compound Interest Calculator

See how your investments grow with compound interest over time.

Simple Interest Calculator

Calculate simple interest on a principal amount.

ROI Calculator

Calculate Return on Investment and annualized ROI for any investment.

Savings Goal Calculator

Plan how much to save monthly to reach your financial goal.

Salary Calculator

Convert salary between hourly, daily, weekly, monthly, and annual pay.

Auto Loan Calculator

Car loan calculator with trade-in, down payment, and tax.

Payment Calculator

Find monthly payment, loan amount, term, or interest rate.

Retirement Calculator

Project 401k/IRA savings growth to retirement with year-by-year table.

Amortization Calculator

Full loan amortization schedule with optional extra payments.

Investment Calculator

Future value of lump sum plus recurring monthly investments.

Inflation Calculator

Calculate real purchasing power and CPI inflation over time.

Income Tax Calculator

Estimate 2024 US federal income tax with bracket breakdown.

Sales Tax Calculator

Add or remove sales tax with all 50 US state rates.

Credit Card Payoff Calculator

See how long to pay off credit card debt and interest saved.

Discount Calculator

Find sale price, discount percentage, or original price.

Annuity Calculator

Present/future value of ordinary annuity or annuity due.

Currency Converter

Convert between 25 major currencies with mid-2024 rates.

Net Worth Calculator

Calculate total net worth from assets and liabilities.

Loan Comparison Calculator

Compare up to 3 loan options side-by-side.

Paycheck Calculator

Estimate net take-home pay after federal, state taxes, and deductions.

Tip Splitter

Split the bill and tip evenly or by custom amounts per person.

Down Payment Calculator

Plan your home down payment savings goal and timeline.

Interest Rate Calculator

Find the interest rate given loan amount, payment, and term.

SIP Calculator

Systematic Investment Plan — estimate mutual fund SIP returns with year-by-year growth.

EMI Calculator

Calculate Equated Monthly Installment for home, car, or personal loans with full schedule.

GST Calculator

Add or remove GST for all Indian tax slabs (5%, 12%, 18%, 28%) with CGST/SGST split.

Fixed Deposit Calculator

Calculate FD maturity amount and interest with quarterly, monthly, or simple compounding.

CAGR Calculator

Compound Annual Growth Rate — find CAGR, future value, present value, or time to goal.

YouTube Earnings Calculator

Estimate YouTube ad revenue, sponsorships, and memberships from views and CPM.

Freelancer Rate Calculator

Calculate your minimum hourly rate to hit income goals after taxes and expenses.

Rent vs. Buy Calculator

Compare the true long-term cost of renting versus buying a home.

Home Affordability Calculator

Find the maximum home price you can afford based on income and debt.

FIRE Calculator

Financial Independence, Retire Early — find your FIRE number and retirement timeline.

Meeting Cost Calculator

Calculate how much a meeting costs based on attendees and salary — with a live timer.

Work From Home Savings

Calculate money and time saved by working from home vs commuting to office.

BMI Calculator

Calculate your Body Mass Index and track your health.

Calorie Calculator

Calculate your daily calorie needs based on age, weight, and activity.

Body Fat Calculator

Estimate body fat percentage using the Navy body fat formula.

Ideal Weight Calculator

Find your ideal body weight range based on height and gender.

Pregnancy Due Date Calculator

Calculate your estimated due date and pregnancy milestones.

BMR Calculator

Basal Metabolic Rate — calories burned at rest (Mifflin-St Jeor).

TDEE Calculator

Total Daily Energy Expenditure with macro breakdown.

Macro Calculator

Calculate protein, fat, and carb targets from calorie goal.

Water Intake Calculator

Daily water recommendation based on weight, activity, and climate.

Sleep Calculator

Find best sleep/wake times based on 90-minute sleep cycles.

Blood Pressure Calculator

Classify blood pressure using AHA 2017 guidelines.

Calories Burned Calculator

Estimate calories burned for 30+ activities using MET values.

Pace Calculator

Running pace, speed, time, and split calculator.

Ovulation Calculator

Find fertile window and estimated ovulation date.

Period Calculator

Predict upcoming periods and ovulation dates.

BAC Calculator

Estimate Blood Alcohol Content using the Widmark formula.

Dog Age Calculator

Convert your dog's age to human years (size-adjusted).

Carbon Footprint Calculator

Estimate your annual CO₂ emissions from driving, flights, energy, and diet.

Age Calculator

Calculate exact age in years, months, and days.

Date Difference Calculator

Calculate the exact duration between two dates.

Time Calculator

Add, subtract, and convert hours, minutes, and seconds.

Hours Calculator

Calculate work hours, total time, and pay per period.

Time Zone Converter

Convert date and time across 25 major world time zones.

Days Alive Calculator

Discover your total days, heartbeats, breaths, and upcoming milestone days.

Unit Converter

Convert between length, weight, temperature, volume, and more.

Temperature Converter

Convert between Celsius, Fahrenheit, and Kelvin instantly.

Length Converter

Convert between meters, feet, inches, miles, kilometers, and more.

Speed Converter

Convert between mph, km/h, m/s, knots, and more.

Number Base Converter

Convert numbers between binary, octal, decimal, and hexadecimal.

Weight Converter

Convert between kg, lbs, oz, stone, tons, and more.

Volume Converter

Convert between liters, gallons, cups, cubic meters, and more.

Area Converter

Convert between square meters, acres, hectares, and more.

Pressure Converter

Convert between Pa, bar, PSI, atm, torr, and more.

Energy Converter

Convert between joules, calories, kWh, BTU, and more.

Power Converter

Convert between watts, kilowatts, horsepower, BTU/hr.

Data Storage Converter

Convert between bits, bytes, KB, MB, GB, TB, and more.

Cooking Converter

Convert cups, tablespoons, ounces, grams, and temperatures.

Fuel Efficiency Converter

Convert between MPG, L/100km, and km/L.

Angle Converter

Convert between degrees, radians, gradians, arcminutes.

GPA Calculator

Calculate weighted GPA from letter grades and credit hours.

Grade Calculator

Calculate weighted average or what you need on your final exam.

Password Generator

Generate strong cryptographically random passwords.

Ohm's Law Calculator

Calculate voltage, current, resistance, and power (V=IR).

Density Calculator

Calculate density, mass, or volume using ρ = m/V.

Half-Life Calculator

Radioactive decay — find remaining quantity, time, or half-life.

Wavelength Calculator

Calculate wavelength, frequency, and wave speed (λ = c/f).

Kinetic Energy Calculator

Calculate kinetic energy, mass, or velocity (KE = ½mv²).

Force Calculator

Newton's Second Law: find force, mass, or acceleration (F=ma).

Gravitational Force Calculator

Newton's Law of Gravitation: F = Gm₁m₂/r².

Statistics Calculator

Calculate mean, median, mode, standard deviation, and variance.

Percentage Change Calculator

Calculate percentage increase, decrease, or difference between values.

Probability Calculator

Calculate basic probability, combinations, and permutations.

Subnet Calculator

Calculate network address, broadcast, host range, and mask from CIDR notation.

Molar Mass Calculator

Calculate molar mass of any chemical formula with element breakdown.

Love Calculator

Calculate love compatibility between two names — just for fun!

Engagement Rate Calculator

Calculate social media engagement rate for Instagram, TikTok, YouTube, and Twitter.