SMALL QUESTIONS. USEFUL ANSWERS. A LITTLE MORE KNOW-HOW.
AdviseHow.
ADVISEHOW / EVERYDAY KNOW-HOW

COLLECTIONS

Make the numbers make sense.

Straightforward formulas, worked examples and a volume converter for your kitchen.

THE HANDY LITTLE TOOL

Milliliters to cups.

The right amount starts with the right cup.

2.113cupsVolume only. For grams, use an ingredient-specific measurement.
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Start with the task in front of you

Choose a guide below for a focused explanation. Each one puts the key idea first, then walks through the details and the mistakes that are easy to make.

NUMBERS

1 crore is equal to how many lakhs?

1 crore equals 100 lakhs. See the arithmetic and a simple way to convert either direction.

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1 crore is equal to how many millions?

One crore is 10 million. Translate between Indian and international number names.

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1 decade is equal to how many years?

A decade contains 10 years. Convert decades, years and centuries with one simple rule.

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1 million is equal to how many crore?

1 million is 0.1 crore, or 10 lakhs. Here is how the three scales fit together.

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How to convert degrees to radians

Multiply degrees by π/180, then simplify.

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How to find density

Divide mass by volume and keep track of the units.

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How to find perimeter

Add the lengths around the outside of a shape.

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How to find the perimeter of a triangle

Add all three sides, then check that your units match.

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How to find the range of a data set

For a set of numerical observations, subtract the smallest value from the largest.

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How to find relative frequency

Divide a category’s count by the total number of observations.

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How to find the slope of a line

Divide the change in y by the change in x, keeping the point order consistent.

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How to find the circumference of a circle

Use 2πr for radius or πd for diameter.

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How to find the midpoint

Average the x-coordinates and the y-coordinates separately.

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How to find the volume of a cone

Use one third of the base area multiplied by the perpendicular height.

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How to find the volume of a rectangular prism

Multiply length, width and height, all measured in the same unit.

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