Financial & Everyday Calculators
73 free calculators for loans, investments, health and quick maths.
Financial Calculators
Property & Mortgages
Mortgage Calculator
Mortgage calculator with amortization chart. Estimate monthly principal and interest, total interest over the term and the real cost of your home loan.
Mortgage Refinance Calculator
See whether refinancing your mortgage will save you money: calculates new monthly payment, lifetime savings and how long until closing costs pay back.
UK Stamp Duty Calculator (2026)
Calculate UK property tax for England (SDLT), Scotland (LBTT) and Wales (LTT) with first-time buyer relief and additional-property surcharge built in.
UK Mortgage Calculator
Work out your UK mortgage payment and loan-to-value band, and see how monthly or lump-sum overpayments cut your term and interest.
Home Affordability Calculator
Estimate the home price you can afford from your income, debts and down payment.
Rent vs Buy Calculator
Compare the total cost of renting versus buying a home over a period of years.
Down Payment Calculator
Work out the down payment you need and how long it will take to save for it.
Mortgage Payoff Calculator
Find a new payoff date and interest saved from an extra monthly payment, switching to biweekly payments, or a one-time lump sum toward your mortgage.
HELOC Calculator
Estimate your available home equity line of credit, the interest-only payment during the draw period, and the higher payment once repayment begins.
Tax & Salary
Federal Tax Refund Calculator (2026)
Estimate your US federal tax refund for tax year 2026 from gross income, filing status, withholding and deductions (standard or itemized).
US Take-Home Salary Calculator (2026)
Calculate your US net paycheck for 2026 (federal tax, FICA, state tax, 401(k), health insurance) with bi-weekly, monthly and annual breakdowns.
Income Tax Calculator
Estimate income tax for any country using your own editable progressive tax brackets: enter any rates and thresholds for any tax year.
Take-Home Salary Calculator
Estimate your net take-home pay after tax, retirement contributions and deductions.
VAT Calculator
Add or remove VAT from any amount for UK, EU and global VAT rates. Supports standard, reduced and zero rates.
Sales Tax Calculator
Add sales tax to a price or back it out of a total, with an editable average combined rate for every US state from Tax Foundation data.
Paycheck Calculator (US)
Estimate your net take-home pay per paycheck after federal tax, Social Security, Medicare and state income tax for all 50 US states.
Overtime Pay Calculator
Calculate overtime pay from an hourly rate, regular and overtime hours, and a multiplier, plus optional double-time hours and the effective hourly rate.
Hourly to Salary Calculator
Convert an hourly wage to annual, monthly, biweekly, weekly and daily pay, or work out the hourly rate behind a salary.
UK Take-Home Pay Calculator (2026/27)
Calculate UK take-home pay for 2026/27 (income tax, National Insurance, student loan and pension) for England, Wales, Northern Ireland and Scotland.
Loans & Debt
Credit Card Payoff Calculator
Find out how long it takes to clear a credit card balance and how much interest it costs.
Debt Payoff Calculator
See how making an extra monthly payment cuts the time and interest to clear a debt.
US Student Loan Calculator (2026)
Calculate monthly student loan payments and total interest under Standard, Extended, Graduated and Income-Driven (RAP) repayment plans for 2026.
Loan Payment Calculator
Calculate the monthly payment for home loans, auto loans, personal loans and mortgages from principal, interest rate and term.
Car Loan Calculator
Calculate monthly car payments from price, down payment, trade-in, interest rate and term.
Car Lease Calculator
Estimate a car lease payment from MSRP, negotiated price, residual value and money factor or APR, including sales tax and the amount due at signing.
APR Calculator
Calculate the Annual Percentage Rate (APR) on a loan from the interest rate, fees and term, the true cost of borrowing.
Amortization Schedule Calculator
See the full month-by-month amortization schedule for any loan (payment, interest, principal and balance) with a downloadable CSV.
Debt-to-Income (DTI) Ratio Calculator
Calculate your front-end and back-end debt-to-income ratio from gross income, housing payment and other monthly debts.
Investing & Savings
UK ISA Calculator (2026-27)
Project the future value of your UK ISA contributions for the 2026-27 tax year. Supports Stocks & Shares, Cash and Lifetime ISA with 25% government bonus.
TFSA Calculator
Calculate your total Canadian TFSA contribution room since 2009, check for over-contributions, and project tax-free growth from monthly contributions.
Compound Interest Calculator
See how savings grow over time with compound interest and optional regular contributions.
Recurring Investment Calculator
Project the future value of any recurring monthly investment given the contribution, expected annual return and time horizon.
Inflation Calculator
See how inflation changes the purchasing power and future cost of a sum of money.
Simple Interest Calculator
Calculate simple interest and the maturity amount on a principal sum, for any annual rate, period and currency without compounding.
Investment Return (ROI) Calculator
Work out what an investment really returned, including regular contributions: money-weighted annual return, total return and net profit.
Lump Sum Investment Calculator
Estimate the future value of a one-time lump sum investment at a given annual return over any period, with monthly or annual compounding.
Savings Goal Calculator
Work out the monthly saving needed to reach a financial goal by a target date.
529 College Savings Calculator
Project how much your 529 college savings plan will grow given monthly contributions, investment return and years until enrollment.
CAGR Calculator
Calculate Compound Annual Growth Rate, or solve it backwards for the ending value or the years needed to reach a target.
Retirement & FIRE
401(k) Savings Calculator (2026)
Project your 401(k) balance at retirement using 2026 IRS contribution limits, employer match, salary growth and expected investment return.
Retirement Calculator
Project your retirement savings from your current age, savings, monthly contributions and expected return.
US HSA Calculator (2026)
Project your Health Savings Account balance at retirement using 2026 IRS limits. Calculates the triple-tax-advantage value over your working years.
FIRE Number Calculator
Calculate the Financial Independence number you need to retire early, with Lean FIRE, Fat FIRE and Coast FIRE variants and years-to-FI projection.
Retirement Expense Inflation Planner
See how much your current expenses will cost after decades of inflation and the corpus you need to cover them throughout retirement.
Roth IRA Calculator
Project the future value of your Roth IRA contributions with tax-free growth, based on annual contribution, expected return and years to retirement.
RRSP Calculator
Calculate your Canadian RRSP contribution limit from earned income and carried-forward room, plus a tax-deferred growth projection to retirement.
Social Security Benefits Calculator
Estimate your monthly Social Security retirement benefit based on your earnings history and the age at which you claim.
Budget & Business
Net Worth Calculator
Add up your assets and subtract your liabilities to see your total net worth.
Budget Planner (50/30/20)
Split your take-home pay into needs, wants and savings using the popular 50/30/20 rule, plus adjustable percentages for your own plan.
Break-even Calculator
Find the sales volume and revenue you need to cover your fixed and variable costs. Essential for any small business or product launch.
Life Insurance Calculator
Estimate how much life insurance coverage you need based on your income, debts, dependants and existing savings.
NPV & IRR Calculator
Calculate Net Present Value and Internal Rate of Return for a series of cash flows. Essential for investment and project analysis.
Health Calculators
BMI Calculator
Calculate BMI in metric or imperial units. Get your Body Mass Index, WHO category, the BMI chart and the normal-weight range for your height.
BMR & Calorie Calculator
Estimate Basal Metabolic Rate and daily calorie needs from age, sex, height and activity.
Pregnancy Due Date Calculator
Estimate your due date and current pregnancy week from the last menstrual period and cycle length.
Ovulation & Fertility Calculator
Find your fertile window and most likely ovulation day from your last period and cycle length.
Daily Water Intake Calculator
Work out how much water you should drink each day based on weight, activity level and climate.
Body Fat % Calculator
Estimate your body-fat percentage using the US Navy method from waist, neck and height measurements.
Heart Rate Zone Calculator
Calculate your maximum heart rate and training zones from age, using the Tanaka or Fox formula, with the Karvonen method if you add resting heart rate.
Running Pace Calculator
Calculate running pace, finish time or distance from any two of the three, with 5K, 10K, half and full marathon presets in km or miles.
Everyday Calculators
Percentage Calculator
Work out percentages, percentage change and what percent one number is of another.
Tip Calculator
Calculate the tip on a restaurant bill at any percentage and split the total fairly between any number of people in seconds.
Age Calculator
Calculate your exact age in years, months, days and total days from any date of birth, plus a countdown to your next birthday.
Discount Calculator
Calculate the sale price and money saved after a percentage discount, with support for chained or stacked discount offers.
Quadratic Equation Solver
Solve any quadratic equation axยฒ + bx + c = 0. Returns roots, discriminant, vertex and axis of symmetry.
Date Difference Calculator
Calculate the exact number of days, weeks, months and years between any two dates, with business-day and weekend breakdowns.
Mean, Median & Mode Calculator
Paste a list of numbers and get the mean, median, mode, range, standard deviation and more.
Triangle Calculator
Enter three sides of a triangle to find the area, perimeter, angles and type (equilateral, isosceles, scalene).
Fuel Cost Calculator
Estimate the fuel cost of a trip from distance, fuel economy and fuel price.
Prime Number Checker
Check whether a number is prime, find its factors, and see the nearest prime numbers above and below it.
GPA Calculator
Calculate your Grade Point Average from course grades and credit hours, for both letter-grade and percentage-based grading systems.
Grade Calculator
Calculate your current weighted grade from any number of categories, or solve for the score you need on a remaining category to hit a target.
Hours Calculator
Calculate hours worked between a start and end time, including overnight shifts and an unpaid break, as hours and minutes or decimal hours.