Everyday

Calculate the sale price and how much you save with any percentage discount.

Calculate an appliance's energy use in kWh and its running cost from wattage, hours per day, days and your per-kWh electricity rate.

Find out exactly what score you need on your final exam to reach your target grade, based on your current grade and the exam weight.

Estimate the fuel cost of any trip from distance, vehicle efficiency and fuel price, plus litres needed and cost per kilometre.

Calculate your grade point average from each course's grade points and credit hours — a fast, accurate weighted GPA in seconds.

Add or remove GST at 5%, 12%, 18% or 28% and instantly see the net amount, the GST charged and the gross total.

Work out how many litres of paint you need from your wall area, the paint's coverage per litre and the number of coats.

Generate one or many random integers within any range you choose — great for draws, picks, games, sampling and quick decisions.

Find how many tiles you need for a floor from the room area and tile size, with a waste allowance for cuts and breakages.

Work out the tip, total bill and amount per person — perfect for splitting a restaurant bill.

Compare two products by price per unit to find the cheaper buy — beat misleading package sizes and pick the best value every time.