Calculators

Gallons of water in your pool. Free, instant, in your browser.

Estimate the maturity value of a Public Provident Fund account from your yearly investment, the PPF rate and the number of years. Free, in your browser, no sign-up.

Estimate your due date, current week, trimester, and pregnancy milestones from your last period. Free, in your browser, nothing is uploaded.

See how many weeks pregnant you are today, the trimester and due date.

Recommended pregnancy weight gain by BMI. Free, instant, in your browser.

Calculate the present value of a series of equal payments, for an ordinary annuity or an annuity due. Free, in your browser, no sign-up.

Generate the first N prime numbers. Free, in your browser, no sign-up.

Find single-event and combined two-event probabilities. Free, in your browser, nothing is uploaded.

Calculate profit from unit cost, selling price, units sold and fixed costs, with profit margin, markup and the break-even quantity. Free, in your browser, no sign-up.

Solve A/B = C/x. Free, instant, in your browser.

Work out rent for a partial month when you move in or out mid-month, by the days in that month, the yearly daily rate, or a 30-day month. Free, in your browser, no sign-up.

Work out how many grams of protein you need per day from your body weight and goal, from the RDA to muscle gain, with a per-meal split. Free, in your browser, no sign-up.

Hypotenuse or missing leg. Free, instant, in your browser.

Roots of ax² + bx + c = 0. Free, instant, in your browser.

Q1, median and Q3 with a box plot. Free, instant, in your browser.

Range, minimum, maximum and IQR. Free, instant, in your browser.

Calculate the maturity value of a recurring deposit from the monthly deposit, interest rate and tenure, compounded quarterly as banks do. Free, in your browser, no sign-up.

Compare your current and new loan payments to see the monthly savings. Free, in your browser, no sign-up.

See how much rent you can afford by the 30% rule, the 40x landlord rule, and after your existing debt payments. Free, in your browser, no sign-up.

Work out the new rent after a percentage increase, the extra cost per month and per year, and the rent after several yearly increases. Free, in your browser, no sign-up.

Compare the true cost of renting versus buying a home over the years you plan to stay, with a break-even year. Free, in your browser, nothing is uploaded.

Analyse a rental property: monthly cash flow after the mortgage, cap rate, cash-on-cash return and net operating income. Free, in your browser, no sign-up.

Calculate the gross and net rental yield of a property from its price, monthly rent, running costs and vacancy. Free, in your browser, no sign-up.

See how long it takes to repay a loan or debt at a monthly repayment you choose, the total interest, and how much an extra monthly repayment saves. Free, in your browser, no sign-up.