Percentage Calculator
Find a percentage of any number in seconds. Also see the value increased or decreased by that percentage for quick markups and discounts.
Calculate a percentage
Enter a percentage and a value to see the result and adjusted totals.
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How it works
Enter two numbers to get the percentage and its effect on the value.
Enter the percentage
Type the percentage you want to apply, such as 20. The calculator treats it as a share out of 100.
Enter the value
Type the number you want the percentage of, such as a price or invoice total. This is the base the percentage is applied to.
Read the results
You get the percentage amount, plus the value increased and decreased by that percentage so you can apply markups or discounts at a glance.
Frequently Asked Questions
Common questions about percentages and how to calculate them.
Divide the percentage by 100 and multiply by the number. For example, 20 percent of 150 is 0.20 times 150, which is 30. This calculator does the math for you when you enter both values.
Divide the part by the whole and multiply by 100. For example, 30 out of 150 is 30 divided by 150, times 100, which is 20 percent. This is useful for working out margins or shares.
Take the percentage of the value, then add it for an increase or subtract it for a decrease. The calculator shows both adjusted totals automatically, so you can see a marked up or discounted price right away.
Divide the final amount by 1 plus the percentage as a decimal. For example, if 120 includes a 20 percent markup, divide 120 by 1.20 to get the original 100. Reverse the sign for a discount.
Apply margins and discounts the easy way
Invoice My Clients calculates taxes, discounts, and totals for you so every invoice adds up correctly.
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