BMI Calculator
Calculate your Body Mass Index
biologyDaily Calorie Needs
Estimate your daily calorie requirements based on age, weight, height, and activity level.
biologyIdeal Weight Calculator
Calculate your ideal body weight based on height using the Devine formula.
biologyBody Fat Percentage
Estimate body fat percentage using the US Navy method.
biologyMaximum Heart Rate
Calculate your maximum heart rate and training zones.
biologyDaily Water Intake
Calculate how much water you should drink daily based on weight.
biologyPregnancy Due Date
Calculate estimated due date from last menstrual period (days from today).
biologyBlood Alcohol Calculator
Estimate blood alcohol content (BAC) based on drinks consumed.
biologySleep Cycle Calculator
Calculate optimal wake times based on 90-minute sleep cycles.
biologyProtein Intake Calculator
Calculate daily protein needs based on weight and activity level.
biologyLoan Payment Calculator
Calculate monthly payment for a loan with fixed interest rate.
financeCompound Interest Calculator
Calculate the future value of an investment with compound interest.
financePercentage Change Calculator
Calculate the percentage change between two values.
financeTip Calculator
Calculate tip amount and total bill with tip.
financeSavings Goal Calculator
Calculate monthly savings needed to reach a goal.
financeRetirement Savings
Estimate how much you'll have saved by retirement.
financeDiscount Calculator
Calculate the final price after applying a discount.
financeCurrency Converter
Convert amount between currencies using exchange rate.
financeROI Calculator
Calculate return on investment percentage.
financeSales Tax Calculator
Calculate sales tax and total price.
financePercentage Calculator
Calculate what percentage one number is of another.
mathQuadratic Equation Solver
Solve quadratic equations of the form axยฒ + bx + c = 0.
mathPythagorean Theorem
Calculate the hypotenuse of a right triangle.
mathCircle Calculator
Calculate circumference and area of a circle.
mathTriangle Area Calculator
Calculate the area of a triangle.
mathLength Unit Converter
Convert between different length units.
mathAverage Calculator
Calculate the average of multiple numbers (sum/count).
mathFraction to Decimal
Convert a fraction to its decimal equivalent.
mathExponent Calculator
Calculate the power of a number (base^exponent).
mathGCD & LCM Calculator
Calculate Greatest Common Divisor and Least Common Multiple.
mathSpeed Calculator
Calculate speed, distance, or time using v = d/t.
physicsForce Calculator (F=ma)
Calculate force using Newton's second law.
physicsKinetic Energy Calculator
Calculate kinetic energy using KE = ยฝmvยฒ.
physicsPotential Energy Calculator
Calculate gravitational potential energy using PE = mgh.
physicsOhm's Law Calculator
Calculate voltage, current, or resistance using V = IR.
physicsFree Fall Calculator
Calculate time and velocity of a falling object.
physicsWavelength & Frequency
Convert between wavelength and frequency for waves.
physicsMomentum Calculator
Calculate momentum using p = mv.
physicsAcceleration Calculator
Calculate acceleration from change in velocity.
physicsDensity Calculator
Calculate density from mass and volume.
physicsMolarity Calculator
Calculate molarity (moles per liter) of a solution.
chemistryDilution Calculator
Calculate dilution using C1V1 = C2V2.
chemistryMolar Mass Calculator
Calculate moles from mass and molar mass.
chemistrypH Calculator
Calculate pH from hydrogen ion concentration.
chemistryIdeal Gas Law (PV=nRT)
Calculate properties of an ideal gas.
chemistryPercent Composition
Calculate percent composition of an element in a compound.
chemistryReaction Yield Calculator
Calculate percent yield of a chemical reaction.
chemistryBoiling Point Elevation
Calculate boiling point elevation of a solution.
chemistryElectrochemistry Calculator
Calculate cell potential using standard reduction potentials.
chemistryHalf-Life Calculator
Calculate remaining amount after radioactive decay.
chemistryOunces to Cups Converter
Convert fluid ounces to cups instantly.
chemistryOz to mL Converter
Convert ounces (oz) to milliliters (mL).
chemistryTest Grade Calculator
Calculate test percentage based on correct and total questions.
mathmL to Oz Converter
Convert milliliters (mL) to ounces (oz).
chemistrymg to mL Calculator
Convert milligrams (mg) to milliliters (mL) using concentration.
chemistryCircumference Calculator
Calculate the circumference of a circle from radius.
mathMargin Calculator
Calculate profit and margin percentage from revenue and cost.
finance90 Day Calculator
Add 90 days to a starting day number.
mathSalary to Hourly Calculator
Convert annual salary to hourly pay based on weekly hours.
finance30 Day Calculator
Add 30 days to a starting day number.
mathAge Calculator
Work out your exact age in years, months, and total days from your birth year.
mathGPA Calculator
Calculate your grade point average from your grade points and credit hours.
mathTDEE Calculator
Calculate your Total Daily Energy Expenditure โ the calories you burn per day.
biologyOvulation Calculator
Find your most fertile days based on your cycle length.
biologyAuto Loan Calculator
Work out the monthly payment on a car loan, including any down payment or trade-in.
financekg to lbs Converter
Convert kilograms to pounds instantly, with the reverse conversion shown alongside.
mathcm to Inches Converter
Convert centimetres to inches โ plus feet-and-inches for heights.
mathCelsius to Fahrenheit Converter
Convert temperatures between Celsius, Fahrenheit and Kelvin.
mathMiles to Kilometres Converter
Convert miles to kilometres โ perfect for road trips, running and pace.
mathFeet to Metres Converter
Convert feet to metres for anything from ceiling heights to cliff dives.
mathPersonal Loan Calculator
Estimate the monthly payment on a personal loan across any term and APR.
financeStudent Loan Calculator
Plan repayments on federal or private student loans over any timeline.
financeCar Loan Calculator
Quickly estimate the monthly payment on a new or used car loan.
financeMortgage Calculator
Complete mortgage payment including principal, interest, taxes, insurance and HOA.
finance