Biology
BMI Calculator
Calculate body mass index from height and weight.
Open calculator →Quick tools · 74 calculators
Find, save, and reuse
your essential calculators.
Search the complete library, keep favorites on this device, and return to tools you recently used.
Complete library
74 matching calculators
Biology
Daily Calorie Needs
Estimate daily calories using body measurements and activity.
Open calculator →Biology
Ideal Weight Calculator
Estimate an ideal body-weight range based on height.
Open calculator →Biology
Body Fat Percentage
Estimate body-fat percentage using common measurements.
Open calculator →Biology
Maximum Heart Rate
Estimate maximum heart rate and training zones.
Open calculator →Biology
Daily Water Intake
Estimate daily hydration needs based on body weight.
Open calculator →Biology
Pregnancy Due Date
Estimate a due date from the last menstrual period.
Open calculator →Biology
Blood Alcohol Estimate
Estimate blood alcohol concentration from supplied inputs.
Open calculator →Biology
Sleep Cycle Calculator
Find suggested wake times using 90-minute sleep cycles.
Open calculator →Biology
Protein Intake
Estimate daily protein needs by weight and activity.
Open calculator →Biology
TDEE Calculator
Estimate total daily energy expenditure.
Open calculator →Biology
Ovulation Calculator
Estimate fertile days from cycle information.
Open calculator →Finance
Loan Payment Calculator
Calculate a fixed-rate monthly loan payment.
Open calculator →Finance
Compound Interest
Project investment growth with compounding.
Open calculator →Finance
Percentage Change
Measure growth or decline between two values.
Open calculator →Finance
Tip Calculator
Calculate a tip amount and final bill.
Open calculator →Finance
Savings Goal
Estimate monthly savings needed to reach a target.
Open calculator →Finance
Retirement Savings
Project how much you may accumulate by retirement.
Open calculator →Finance
Discount Calculator
Find a final price after a percentage discount.
Open calculator →Finance
Currency Converter
Convert an amount using a supplied exchange rate.
Open calculator →Finance
ROI Calculator
Calculate return on investment percentage.
Open calculator →Finance
Sales Tax Calculator
Calculate sales tax and total purchase price.
Open calculator →Finance
Margin Calculator
Calculate profit and margin from revenue and cost.
Open calculator →Finance
Salary to Hourly
Convert annual salary into an hourly rate.
Open calculator →Finance
Auto Loan Calculator
Estimate payments with down payment and trade-in.
Open calculator →Finance
Personal Loan Calculator
Estimate monthly payment, total interest, and full cost.
Open calculator →Finance
Student Loan Calculator
Plan repayments across a selected term and APR.
Open calculator →Finance
Car Loan Calculator
Quickly estimate a new or used vehicle payment.
Open calculator →Finance
Mortgage Calculator
Estimate principal, interest, taxes, insurance, and HOA.
Open calculator →Math
Percentage Calculator
Find what percentage one number is of another.
Open calculator →Math
Quadratic Equation Solver
Solve equations in the form ax² + bx + c = 0.
Open calculator →Math
Pythagorean Theorem
Calculate a right triangle hypotenuse.
Open calculator →Math
Circle Calculator
Calculate circumference and area from radius.
Open calculator →Math
Triangle Area
Calculate area from base and height.
Open calculator →Math
Length Unit Converter
Convert between common length units.
Open calculator →Math
Average Calculator
Calculate the mean of multiple values.
Open calculator →Math
Fraction to Decimal
Convert a fraction into decimal form.
Open calculator →Math
Exponent Calculator
Raise a base to a selected power.
Open calculator →Math
GCD & LCM Calculator
Find greatest common divisor and least common multiple.
Open calculator →Math
Test Grade Calculator
Calculate a score from correct and total questions.
Open calculator →Math
Circumference Calculator
Calculate circle circumference from radius.
Open calculator →Math
90 Day Calculator
Add 90 days to a starting date.
Open calculator →Math
30 Day Calculator
Add 30 days to a starting date.
Open calculator →Math
Age Calculator
Calculate age in years, months, and days.
Open calculator →Math
GPA Calculator
Calculate grade-point average with credit hours.
Open calculator →Math
Kilograms to Pounds
Convert kilograms and pounds in either direction.
Open calculator →Math
Centimetres to Inches
Convert centimetres to inches and feet.
Open calculator →Math
Temperature Converter
Convert Celsius, Fahrenheit, and Kelvin.
Open calculator →Math
Miles to Kilometres
Convert miles and kilometres.
Open calculator →Math
Feet to Metres
Convert feet and metres.
Open calculator →Physics
Speed Calculator
Calculate speed, distance, or time using v = d/t.
Open calculator →Physics
Force Calculator
Apply Newton’s second law: F = ma.
Open calculator →Physics
Kinetic Energy
Calculate kinetic energy using KE = ½mv².
Open calculator →Physics
Potential Energy
Calculate gravitational potential energy.
Open calculator →Physics
Ohm’s Law
Calculate voltage, current, or resistance.
Open calculator →Physics
Free Fall Calculator
Estimate falling time and final velocity.
Open calculator →Physics
Wavelength & Frequency
Convert between wavelength and frequency.
Open calculator →Physics
Momentum Calculator
Calculate momentum using p = mv.
Open calculator →Physics
Acceleration Calculator
Calculate acceleration from velocity change.
Open calculator →Physics
Density Calculator
Calculate density from mass and volume.
Open calculator →Chemistry
Molarity Calculator
Calculate moles of solute per liter of solution.
Open calculator →Chemistry
Dilution Calculator
Solve dilution problems using C₁V₁ = C₂V₂.
Open calculator →Chemistry
Molar Mass Calculator
Convert between mass, moles, and molar mass.
Open calculator →Chemistry
pH Calculator
Calculate pH from hydrogen-ion concentration.
Open calculator →Chemistry
Ideal Gas Law
Calculate properties using PV = nRT.
Open calculator →Chemistry
Percent Composition
Find element composition within a compound.
Open calculator →Chemistry
Reaction Yield
Calculate percent yield of a chemical reaction.
Open calculator →Chemistry
Boiling Point Elevation
Calculate solution boiling-point elevation.
Open calculator →Chemistry
Electrochemistry
Calculate cell potential from reduction potentials.
Open calculator →Chemistry
Half-Life Calculator
Calculate remaining material after radioactive decay.
Open calculator →Chemistry
Ounces to Cups
Convert fluid ounces and cups.
Open calculator →Chemistry
Ounces to Millilitres
Convert fluid ounces into millilitres.
Open calculator →Chemistry
Millilitres to Ounces
Convert millilitres into fluid ounces.
Open calculator →Chemistry
Milligrams to Millilitres
Convert mass to volume using concentration.
Open calculator →