Calculators
Quick, accurate calculators for money, maths and everyday life: percentages and discounts, loans and mortgages, compound interest and savings goals, VAT, tips and bill splitting, BMI and calorie needs, and grades.
Each one shows how the answer was worked out, and none of them needs an account.
Popular calculators
Percentage CalculatorPercent of, percent change, and increase or decrease by a percent.Compound Interest CalculatorGrowth with compounding and monthly deposits, year by year.Loan CalculatorMonthly repayment, total interest and an amortisation schedule.Profit Margin CalculatorMargin vs markup from cost and price, or the price for a target margin.Fraction CalculatorFraction and mixed-number arithmetic with simplified answers and working.ROI CalculatorTotal and annualised return on investment.
More calculators
Average CalculatorMean, median, mode, standard deviation and more from a list of numbers.Bill SplitterItemised restaurant bills and group trip expenses, settled to the cent.BMI CalculatorAdult BMI with WHO category, in kg/cm or lb/ft/in.Body Fat CalculatorBody fat % from tape measurements, with ACE category.Break-Even CalculatorBreak-even units and revenue from fixed and variable costs.CAGR CalculatorCompound annual growth rate, future value and time to a target.Calorie and TDEE CalculatorBMR, maintenance calories and targets to lose or gain weight.Credit Card Payoff CalculatorMonths to pay off a card, or the payment to clear it in time.Debt Payoff CalculatorSnowball vs avalanche: payoff time, interest and order.Discount CalculatorSale price, savings and the true total of stacked discounts.Final Grade CalculatorScore needed on the final, plus weighted grade averages.Freelance Hourly Rate CalculatorThe hourly and day rate that pays your target income.Fuel Cost CalculatorFuel needed and trip cost in any unit, split between passengers.GPA CalculatorSemester and cumulative GPA from letter grades and credits.Inflation CalculatorFuture cost, today's value and the rule of 72 at an inflation rate you choose.Meeting Cost CalculatorTotal, hourly and per-minute meeting cost, plus a live ticking meter.Mortgage Affordability CalculatorMax home price and monthly payment from income and DTI limits.Ratio CalculatorSimplify, solve, scale and split ratios.Rent vs Buy CalculatorNet worth from renting vs buying, year by year, and when buying wins.Retirement CalculatorProjected retirement pot and the monthly income it could pay.Roman Numeral ConverterNumbers to Roman numerals and back, with validation and a breakdown.Salary to Hourly CalculatorHourly, weekly, monthly and annual pay from any one of them.Savings Goal CalculatorMonthly deposit needed for a goal, or how long your savings will take.Scientific CalculatorTrig, logs, powers, roots and factorials with history.Subscription Cost CalculatorMonthly and yearly subscription totals, cost per use and savings from cancelling.Tip CalculatorTip, total and each person's share, with optional rounding up.Unit ConverterMetric, imperial and US units across 11 kinds of measurement.VAT CalculatorAdd or remove VAT/GST at any rate and see net, tax and gross.