Introduction
This increase calculator helps you work with percentage increases and decreases quickly. It has two simple modes. In the first mode, you enter a starting number and a percentage, and the tool finds the new value after the increase. In the second mode, you enter two numbers, and it tells you the percentage change between them.
You can use this calculator for many everyday tasks. Find a price after a markup, see how much a bill went up, or check how your test scores changed over time. It even works with time values like 1:30 or 0:45:00, so you can compare durations too.
Every calculation comes with a step-by-step solution that shows the math behind the answer. A bar chart gives you a clear visual comparison of your original and new values. You can also pick how many decimal places you want in your result, from 0 to 4. Just enter your numbers, press Calculate, and get your answer right away.
How to Use Our Increase Calculator
This increase calculator has two modes. The first mode finds a new value after a percentage increase. The second mode finds the percentage increase between two numbers. Pick your mode using the tabs at the top.
Mode 1: Find New Value
Original Value: Enter the number you want to start with. This is the number before any increase or decrease is applied.
Increase By (%): Enter the percentage you want to increase by. Use a negative number if you want to calculate a percentage decrease instead.
Mode 2: Find Percentage Increase
Original Value (V1): Enter your starting number. You can also type a time value like 1:30 or 0:45:00, and the calculator will convert it to seconds.
New Value (V2): Enter the number after the change. This field also accepts time formats just like V1.
Additional Settings
Decimal Places: Choose how many decimal places you want in your result. The default is 2. Changing this updates the result right away.
Press the Calculate button to see your result. The calculator will show the answer, a step-by-step solution, and a bar chart that compares the two values. Press Clear to reset all fields back to their defaults.
What Is Percentage Increase?
A percentage increase tells you how much a number has grown compared to its starting value. For example, if a shirt costs $50 and the price goes up by 10%, the new price is $55. The $5 difference is the increase, and 10% describes how big that increase is relative to the original price.
How to Calculate Percentage Increase
There are two common things people need to find. The first is the new value after a percentage increase. To get this, multiply the original number by 1 plus the percentage divided by 100. The formula looks like this:
New Value = Original × (1 + Percent ÷ 100)
The second is the percentage change between two numbers. To find this, subtract the old value from the new value, divide by the old value, and multiply by 100:
Percentage Change = ((New Value − Old Value) ÷ |Old Value|) × 100
A positive result means an increase. A negative result means a decrease. If you need to find the percent difference between two values regardless of direction, that uses a slightly different formula.
When You Might Need This
Percentage increase shows up in everyday life more than you might think. You use it when comparing prices, tracking salary raises, measuring population growth, or checking how your grades changed from one test to the next. Business owners use it to measure revenue growth and return on investment. Athletes use it to track improvements in pace or distance over time.
Increase vs. Decrease
This calculator handles both directions. If you enter a negative percentage in the "Find New Value" mode, it calculates a decrease instead. In the "Find Percentage Increase" mode, if the new value is smaller than the original, the result automatically shows as a percentage decrease.