Standard Calculator
Safe arithmetic expression calculator.
standardregular计算器
Calculator Collection
General Utility Calculators
Percentage, tax, date, unit, and everyday utility calculators for fast decisions.
Percentage Change
Change percentage or derive value from percentage.
percentagepercent%百分比
Discount / Markup
Apply discount or markup to base price.
discountmarkup折扣加价
VAT / GST
Add or remove indirect tax from amount.
vatgsttax税额
Date Interval
Count days and weeks between two dates.
dateintervaldays日期
Business Day Count
Count weekdays between two dates.
business dayworkday工作日
Unit Converter
Length / Weight / Temperature conversion.
unitconvertlengthweight
Tip & Split
Calculate tip, total bill, and per-person share.
tipsplitbill小费