Calculators
An answer you cannot check is worth little, so each calculator shows how it got there — the formula, the intermediate numbers, the schedule.
- Percentage Calculator Pick the question you are actually asking — the fields and the answer change with it. Every cal…
- Discount Calculator Type the price and the discount — the final amount appears as you type. Nothing to press, nothi…
- VAT Calculator Adding tax is a multiplication; removing it is a division, and that is where most mistakes happ…
- Tip Calculator Type the tip percentage and the bill — the amount appears as you type. No app to install at the…
- Loan Calculator Enter the amount, the rate and the term — the payment appears at once. Add an extra payment eac…
- Mortgage Calculator Enter the price of the home and what you are putting down — the rest is worked out for you: the…
- BMI Calculator Enter weight and height — the index appears with the WHO category and, more usefully, the weigh…
- Pregnancy Calculator Tell the calculator what you know — the first day of your last period, the day of conception, o…
- Time Difference Between Cities The question is never really “what is the difference in hours”. It is “can I call now” and “wha…
- Salary Calculator An offer names a yearly figure, a payslip a monthly one, an agency an hourly one — and comparin…
- Calorie Calculator Fill in your sex, age, height and weight, say how much you move and what you want from your wei…
- GPA Calculator Enter the grade and the credits for each course — the average appears as you type. Add your pre…
- Hours Calculator Fill in when each shift started and ended, subtract the break, and the week adds up as you type…
- Grade Calculator List the parts of the course, how much each is worth and what you scored. Two numbers come out:…
- Average Calculator Paste a column from a spreadsheet or type the numbers separated by spaces, commas or new lines.…
- Scientific Calculator Type the whole expression and read the answer as you go — brackets, powers, trigonometry and lo…
- Car Loan Calculator A car loan is not just an amount, a rate and a term. Sales tax, dealer fees and the trade-in al…
- Compound Interest Calculator Put in what you start with, what you add each period and for how long. The total comes with the…
- Inflation Calculator Enter an amount and two years — the calculator shows what the same basket costs now, how much p…
- Fraction Calculator Write the fractions as you would on paper — 3/4, 1 1/2 or 0.75 — pick the operation and get the…