All Calculators
Browse our complete collection of free online calculators.
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Financial Calculators
Mortgage Calculator
Calculate your monthly mortgage payment, total interest and full amortization schedule, with property tax, insurance and extra payments.
Loan Calculator
Calculate loan payments, total interest, and payoff for amortized loans, simple interest, and compound interest — all in one tool.
EMI Calculator
Calculate your Equated Monthly Installment (EMI) for a home, car or personal loan, plus total interest and total repayment over the term.
Simple Interest Calculator
Calculate simple interest on a loan or investment with I = P × R × T, and see the total amount owed or earned at the end of the term.
Auto Loan Calculator
Estimate your car payment with sales tax, down payment and trade-in included, and see the amount financed, total interest and full cost of the vehicle.
Interest Calculator
Calculate compound interest with annual, quarterly, monthly or daily compounding and optional monthly deposits, then compare it with simple interest.
Investment Calculator
Project what an initial amount and monthly contributions could grow to at a steady annual return, split into money you put in and investment growth.
Retirement Calculator
Estimate your balance at retirement, what it is worth in today's dollars, and the yearly and monthly income it could sustain at your withdrawal rate.
Budget Planner
Sort your monthly spending into needs, wants and savings, see what is left over, and compare each share of your income with the 50/30/20 guideline.
Debt Payoff Calculator
Compare the debt snowball and avalanche methods month by month across three debts to see your debt-free date, total interest and which saves you more.
Home Affordability Calculator
Find the highest home price the 28/36 rule supports for your income, debts and down payment, with property tax and insurance built into the payment.
Debt-to-Income Calculator
Work out your front-end and back-end debt-to-income ratios from your gross income and monthly payments, and see where they sit against lender guidelines.
Child Education Planner
Project the future cost of your child's education with inflation, see the gap your savings leave, and find the monthly amount needed to close it in time.
Forex Profit Calculator
Calculate pips gained and profit or loss on a forex trade from your direction, position size and entry and exit prices, converted to your account currency.
Savings Goal Calculator
Find out how long it takes to reach a savings goal with your monthly deposit and interest rate, and how much of the total comes from interest you earn.
Net Worth Calculator
Add up what you own and what you owe to find your net worth, total assets, total liabilities and debt-to-asset ratio, then track it from year to year.
Vacation Budget Calculator
Price a trip from flights, lodging, food and activities plus a buffer, then see the cost per person and how much to save each month before you leave.
SIP Calculator
Estimate what a monthly or step-up mutual fund SIP could grow to in rupees, or the SIP needed for a goal, with a year-by-year table and inflation view.
FD Calculator
Calculate fixed deposit maturity value and interest in rupees with quarterly, monthly or yearly compounding or payouts, plus a year-by-year table.
RD Calculator
Calculate recurring deposit maturity in rupees with the quarterly compounding Indian banks use, plus total deposited, interest and a quarterly table.
PPF Calculator
Calculate Public Provident Fund maturity value and interest in rupees for yearly or monthly deposits and 5-year extensions, with a year-by-year table.
GST Calculator
Add GST to a price or remove it from a GST-inclusive total at India's 5%, 18% and 40% rates, with the CGST and SGST or IGST split in rupees.
Sales Tax Calculator
Add sales tax to a price to get the total, or work back from a receipt total to the price before tax and the tax you paid, at any rate.
Tip Calculator
Work out the tip and total for any bill, split it evenly between any number of people, and round each share up to a whole dollar if you like.
Health & Fitness
BMI Calculator
Calculate your Body Mass Index from height and weight and see the adult BMI category, with what the number can and cannot tell you.
BMR Calculator
Calculate your Basal Metabolic Rate with the Mifflin-St Jeor equation to estimate how many calories your body uses each day at rest.
TDEE Calculator
Estimate your Total Daily Energy Expenditure from your BMR and activity level to see roughly how many calories you burn in a day.
Calorie Calculator
Estimate daily calories with the Mifflin-St Jeor equation and see your maintenance level plus a target for gradual weight loss or gain.
Body Fat Calculator
Estimate body fat percentage from tape measurements using the U.S. Navy method, with fat mass, lean mass and your ACE category.
Ideal Weight Calculator
Compare the Devine, Robinson, Miller and Hamwi ideal weight formulas for your height and sex, alongside the BMI 18.5 to 24.9 healthy range.
Macronutrient Calculator
Turn your daily calories into grams of protein, carbs and fat with a balanced, lower-carb or higher-carb split, at 4, 4 and 9 kcal per gram.
Pregnancy Due Date Calculator
Estimate your due date from your last period and cycle length with Naegele's rule, plus conception date, weeks pregnant and trimester.
Ovulation Calculator
Estimate your ovulation date, fertile window and next period from your last period and cycle length. An estimate only, never contraception.
Heart Rate Zone Calculator
Find your estimated max heart rate by two formulas and five Karvonen training zones in beats per minute, from your age and resting heart rate.
Blood Pressure Calculator
See which American Heart Association category your systolic and diastolic reading falls in, what it means and when to seek urgent help.
Waist-to-Hip Ratio Calculator
Work out your waist-to-hip ratio and compare it with the World Health Organization cut-offs of 0.90 for men and 0.85 for women.
Sleep Calculator
Find a bedtime for your wake-up time based on 90-minute sleep cycles, with 15 minutes to fall asleep, and see which options reach 7 hours.
Math & Science
Percentage Calculator
Work out a percentage of a number, the percentage change between two values, or what percent one number is of another, with worked examples.
Scientific Calculator
Free online scientific calculator with trigonometry, logarithms, powers, roots and factorials, in degree or radian mode. No download needed.
Age Calculator
Find your exact age in years, months and days from your date of birth, plus your age in weeks and days and a countdown to your next birthday.
GPA Calculator
Calculate your GPA for the term on the 4.0 scale from letter grades and credit hours, then combine it with your current GPA for a new cumulative GPA.
Engineering & Science
Heat Capacity Calculator
Calculate the heat energy needed to change a material's temperature using Q = mcΔT, from its mass, specific heat and temperature change.
Thermal Properties Calculator
Calculate the thermal resistance of a material layer from its thickness and thermal conductivity using R = L/k, for insulation and heat flow work.
Charge & Current Density Calculator
Calculate volume charge density from charge and volume, and current density from current and cross-section area, for electromagnetism problems.
Kinematic Viscosity Calculator
Convert dynamic viscosity (cP, Pa·s) to kinematic viscosity (cSt, m²/s) and back, using the fluid's density. Includes densities for common fluids.
Reynolds Number Calculator
Find the Reynolds number for flow in a pipe from velocity, diameter and viscosity, and see whether the flow is laminar, transitional or turbulent.
Torque to Power Calculator
Find power from torque and rpm, torque from power and rpm, or rpm from both, in kW, hp, PS, N·m, lb-ft and kgf·m, with the 5,252 rpm shortcut.