Everyday math

Percentages, ratios, unit conversions, dates and times.

• Everyday math

  Percentage Calculator

  Three everyday percentage questions in one place. Choose what you want to find, enter two numbers and press Calculate.

• Everyday math

  Unit Converter

  Choose what you are converting, enter a value and pick the units.

• Everyday math

  Ratio Calculator

  Simplify a ratio, or find the missing value in a proportion.

• Everyday math

  Date Calculator

  Count days between two dates, or add days to a date.

• Everyday math

  Interest Calculator

  Find the final amount and the interest for simple or compound interest — compounded yearly, half-yearly, quarterly, monthly or daily.

• Everyday math

  Speed, Distance and Time Calculator

  Find the speed, the distance or the time from the other two, using speed = distance ÷ time — in km/h, m/s or mph.

• Everyday math

  Discount and Sales Tax Calculator

  Find the sale price after a percent-off discount, then add sales tax (GST or VAT) to get the final price.