Calculators
Percentages, loans, discounts, tax, averages, age and more.
Percentage Calculator Calculate a percentage of any value. Enter a percentage and a number to see the result. Loan Calculator Estimate your monthly payment and total interest on a loan. Enter the amount, annual rate and term in months. Discount Calculator See what an item costs after a discount. Enter the original price and the discount percentage to get the final price and your savings. Sales Tax Calculator Work out how much sales tax to add to a purchase. Enter the amount before tax and the tax rate to see the tax and the total. GST Calculator Calculate Goods and Services Tax on an amount. Enter the price before GST and the GST rate to get the GST and the total including it. Margin Calculator Find your profit and profit margin. Enter what an item costs you and what you sell it for to see the profit and margin percentage. CPM Calculator Find your cost per thousand impressions for an ad campaign. Enter the total cost and the number of impressions to get the CPM. Tip Calculator Quickly work out a tip and split the bill. Enter the bill amount, tip percentage and number of people to see the tip, total and per-person share. PayPal Fee Calculator See how much PayPal takes from a payment. Enter the amount, the percentage fee and the fixed fee to get the fee and what you keep. Probability Calculator Find the odds over repeated tries. Enter the chance of a single event and how many times you try to see the chance of at least one success. Confidence Interval Calculator Build a confidence interval around your sample mean. Enter the mean, standard deviation, sample size and confidence level to get the range.