Calculators
BMI, mortgage, investment, currency, tax and everyday calculators
Free online calculators for BMI, mortgages, tax, tips, GPA, loans, currency and everyday money math.
Health calculators
BMI, BMR and body fat estimates.
Money & loans
Mortgage, interest, salary, tax and payoff tools.
Mortgage Calculator
Calculate monthly payments, total interest and amortization
Stamp Duty Calculator
Estimate UK stamp duty or Australian transfer duty on a home purchase
Investment Calculator
Project future value of investments with regular contributions
Compound Interest
Calculate compound interest with flexible compounding frequency
Profit Margin Calculator
Calculate profit, margin, markup, selling price, cost price and ROI
Salary Tax Calculator
Income tax and take-home pay by country and tax year, plus US state tax, UK student loan and AU HELP
Sales Tax Calculator
Add sales tax to a price or remove it from a total, for all 50 US states
Paycheck Calculator
Estimate your US take-home pay after federal tax, Social Security and Medicare
Auto Loan Calculator
Work out your monthly car payment, total interest and amortization schedule
Credit Card Payoff
See how long to clear your balance and what paying extra would save
Retirement Calculator
Project your retirement savings including employer match and IRS limits
Hourly to Salary
Convert an hourly wage to a yearly salary and every cadence in between
GST / VAT Calculator
Add or remove GST and VAT from any amount
Net Worth Calculator
Add up what you own and what you owe to see where you actually stand
Inflation Calculator
See what any amount of money is worth in another year using US CPI data
Debt Payoff Calculator
Plan the snowball or avalanche method and see which clears your debts cheaper
Savings Goal Calculator
Work out how much to put aside each month to hit a target by a date
Gold Price Calculator
Work out how much your gold is worth by weight and karat - per gram, tola, ounce, pound, kilo or tonne
Mileage / Expense Log
Log trips and claim IRS, HMRC or ATO mileage rates as a CSV
Zakat Calculator
Calculate zakat on cash, gold, silver, stocks and business assets with gold or silver nisab
Everyday splits & discounts
Tips, discounts, rent splits, GPA and currency.
Math Solver
Snap or paste a photo of a printed equation, or type it, and get the answer with steps
Tip Calculator
Calculate tip amount and split the bill between multiple people
Discount Calculator
Calculate sale price, savings and discount percentage
Currency Converter
Convert between 170+ currencies with live exchange rates
GPA Calculator
Work out your GPA on the 4.0 scale from letter grades or percentage marks, with credit hours
Rent Split Calculator
Split rent and shared bills evenly, by income, by room size or by nights stayed
Bill Split Card
Split a bill equally, by percent, by amount, or "one person paid", then generate a dramatic or calm share card for the group chat
Frequently asked questions
Yes. Results update instantly and normal use does not require an account.
No lasting archive of calculator inputs is kept for these client-side tools.
Use Mortgage, Auto Loan or the EMI Calculator in Math & Finance depending on the loan type.