Calculators
Percentages, discounts, sales tax, loans, compound interest and more.
8 tools
Number Base Converter
Convert integers between binary, octal, decimal, hex and any base from 2 to 36, with big numbers, negatives and two’s complement.Percentage Calculator
Find a percent of a number, what percent one number is of another, percent change, and a value after a percent increase or decrease, with the formula shown.Discount Calculator
Work out the sale price and savings for % off or Taiwan-style 折 discounts, including stacked discounts and spend-and-save coupons.Taiwan VAT Calculator
Convert between amounts before and after Taiwan’s 5% business tax (VAT), rounded to whole NT$ the way uniform invoices are.Split Bill
Split a bill evenly, by shares or by what each person ordered, with service charge, tax and tip, and see exactly who pays the leftover cent.Loan Calculator
Work out monthly payments and total interest for a mortgage or loan, with equal payments or equal principal, grace periods, stepped rates and a full schedule.Compound Interest Calculator
See how a lump sum and monthly contributions grow with compound interest, with a year-by-year table, a chart and the rule of 72.BMI Calculator
Calculate your BMI from height and weight in metric or imperial units, with WHO and Taiwan adult categories and a healthy weight range.