18 tools

Calculators

Fast, formula-transparent calculators for percentages, averages, loans, margins, discounts, sales tax, GST, payment fees, dates, hours and calories.

All calculators

Age CalculatorExact age in years, months and days, plus next birthday.
Percentage CalculatorPercent of, percent change, increase and decrease.
Average CalculatorMean, median, mode, range and standard deviation of a list.
Confidence Interval CalculatorConfidence interval for a mean from sample statistics.
Probability CalculatorCombined probabilities of two independent events and repeated trials.
Sales Tax CalculatorAdd sales tax to a price, or back it out of a total.
Margin CalculatorProfit margin and markup from cost and price, or price from a target.
Discount CalculatorSale price after one or two stacked discounts, with optional tax.
PayPal Fee CalculatorWhat you receive after PayPal fees, or what to ask for.
Stripe Fee CalculatorWhat you receive after Stripe fees, or what to charge.
CPM CalculatorSolve for CPM, total cost or impressions.
Loan CalculatorMonthly payment, total interest and payoff date.
GST CalculatorAdd or remove GST, with CGST / SGST split.
Days CalculatorDays, weeks and business days between two dates.
Hours CalculatorHours worked between two times, minus breaks, with pay.
Month CalculatorMonths between two dates, or a date plus N months.
Calorie CalculatorDaily calories to maintain, lose or gain weight.
TDEE CalculatorTotal daily energy expenditure, BMR and BMI.

Yes — all 18 calculators on Toolbench are free, with no sign-up and no usage limits.

No. They run in your browser. Nothing is saved unless you sign in, and then only to your own private account.