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Unit, currency & percentage converters

Fast converters for percentages, metric/imperial units (weight, length, temperature) and ECB exchange rates.

Calculate what x% of y is, what percentage a is of b, and the percentage change from A to B.

Calculate the percentage increase or decrease from a starting value to a new value.

Weight, length, distance and temperature. Convert common metric and imperial units instantly.

Euro, zloty, US dollar and other ECB currencies using the reference rate from the latest TARGET business day.

Calculate travel time in hours and minutes from trip distance and average speed.

Scale an ingredient amount up or down from the recipe’s original yield to the number of servings you want.

Calculate how many litres of paint you need from wall area, number of coats and tin coverage (m²/L).

Calculate how many packs of laminate, wood flooring or tiles to buy from room area, cutting waste and pack coverage.

Calculate how many wallpaper rolls to buy from wall perimeter, room height, roll dimensions and pattern-matching waste.

Calculate cubic metres (m³) of concrete needed for a rectangular slab or screed, including a waste margin.