Calculate the new value after a percentage increase, find the percent increase between two values, reverse-calculate the original, or project compound increases. Growth table, visual bars, and quic...
The **Percentage Increase Calculator** is a focused tool for working with percentage increases — one of the most common calculations in business, finance, shopping, and everyday math. Whether you are calculating a salary raise, a price markup, an investment return, or a population growth figure, this calculator handles it.
Choose from four modes. **"Find new value after % increase"** applies a given percentage to a starting number to determine the result — for example, $500 with a 20% increase becomes $600. **"Find the % increase"** does the reverse: given the original and new values, it calculates the percentage growth. **"Find original value"** back-calculates the starting point when you know the result and the percent applied. **"Compound increases"** projects the effect of repeating the same percentage increase over multiple periods, revealing the power of exponential growth.
The six output cards display the original value, new value, increase amount, percent increase, multiplier, and the per-unit increase. A stacked bar visualizes how much of the new value is the original versus the added portion. The **growth table** shows every period up to 20 steps, with per-period gains, cumulative percentages, and visual bars — ideal for understanding how compound interest or repeated raises accumulate over time.
A collapsible **quick reference table** lists the new value and increase amount for 11 standard percentages (5% through 200%) applied to your original value, so you can instantly compare different increase scenarios.
Preset buttons cover common situations like price markups, salary raises, investment returns, and multi-period compounding, letting you explore the calculator without manual entry.
This calculator is useful when you need more than a one-line percent formula. The four modes let you move in either direction: apply an increase, recover the percent change from two values, reverse-engineer the original amount, or project the effect of repeated growth over many periods. That makes it practical for raises, price markups, rent increases, investment projections, and any situation where the same percentage appears in different forms.
It is also helpful for checking intuition. The stacked increase bar shows how much of the final value is the original amount versus the added growth, the growth table shows what happens period by period under compounding, and the quick reference table lets you compare common increase rates without re-entering data. Those extras make it much easier to explain percentage growth, not just compute it.
New = Original × (1 + pct/100). % Increase = (New − Original) / Original × 100. Original = New / (1 + pct/100). Compound: Original × (1 + pct/100)^n.
Result: For these inputs, the calculator returns the percentage increase result plus supporting breakdown values shown in the output cards.
This example reflects the built-in percentage increase workflow: enter values, apply options, and read both the main answer and supporting metrics.
Percentage increase appears anywhere a value grows relative to its starting point. A store may mark up an item by 25%, an employer may give a 4% raise, or an investment account may grow by 7% per year. In each case, the important question is not just the added amount, but how large that increase is compared with the original value.
That is why the calculator shows the original value, increase amount, percent increase, and multiplier together. Those outputs let you move between everyday language like "up by 15%" and the exact math behind it.
A one-time increase and repeated increases are not the same. If a value grows by 10% once, the multiplier is 1.10. If it grows by 10% for six periods, the multiplier becomes $1.10^6$, which is much larger than adding 10% six times in a straight line.
The compound mode and growth table make this distinction visible. Each row shows the new value, the gain during that period, and the cumulative percent increase. This is especially useful for interest, recurring price changes, membership growth, and any other process where each new increase is applied to an already larger base.
The quick percentage table is useful when you want a fast comparison across common rates such as 5%, 10%, 20%, 50%, or 100%. Instead of recalculating each scenario manually, you can compare new values and increase amounts side by side. The increase bar complements that table by showing how much of the final result comes from the original base and how much comes from the added growth.
Together, these features make the calculator useful for planning, checking, and explaining percentage increases with much more clarity than a single formula line.
Percentage increase = ((New Value − Old Value) / Old Value) × 100. For example, going from 50 to 75 is a ((75−50)/50) × 100 = 50% increase.
Yes. If the new value is more than double the original, the increase exceeds 100%. For example, going from 10 to 30 is a 200% increase.
A percentage increase is relative to the original value, while percentage points measure the absolute difference between two percentages (e.g., from 20% to 25% is 5 percentage points but a 25% increase).
A compound annual growth rate applies the same percentage increase each year to the already-grown value. After n years at rate r%, the final value is initial × (1 + r/100)^n.
The rule of 72 states that a value doubles in approximately 72/r years when growing at an annual rate of r%. It is a useful mental shortcut for estimating how long compound growth takes to double an investment.
No. A 25% increase followed by a 25% decrease returns only 93.75% of the original value: 1.25 × 0.75 = 0.9375. The asymmetry grows as the percent increases.