Percent Change Calculator: Quick, Clear, and Concise

This percent change calculator shows how a value moves from start to finish. It also solves a missing starting value or a missing final value. The page displays the formula in plain view. Results label absolute change, percent change, and the change type.

What Is a Percent Change Calculator?

A percent change calculator finds how much a number grows or shrinks. It compares a final value with a starting value. The math uses this rule. Percent change equals the change divided by the size of the starting value, then times 100. The size means the absolute value. That choice handles negative starting values cleanly.

How It Works

The core formula is simple. Percent change equals new minus start, divided by the absolute starting value, then times 100. Positive results mean an increase. Negative results mean a decrease. Zero means no change at all.

You can also solve for the starting value. Use starting value equals final value divided by one plus percent change over 100.

You can also solve for the final value. Use final value equals starting value times one plus percent change over 100.

The calculator shows clear labels. You see absolute change, percent change, and the type of change. For solve modes, you also see a quick verification.

Step-by-Step Guide

1. Choose a mode. Pick Calculate Percent Change, Find Starting Value, or Find Final Value.
2. Fill the fields for that mode. Enter numbers only.
3. Select Calculate. Read the result and the supporting math.

Field guide

• Starting Value in Percent Change mode. Enter the original number.
• Final Value in Percent Change mode. Enter the new number.
• Final Value in Find Starting Value mode. Enter the known ending number.
• Percent Change in Find Starting Value mode. Enter the rate as a number, for example 25 for 25 percent.
• Starting Value in Find Final Value mode. Enter the known beginning number.
• Percent Change in Find Final Value mode. Enter the rate as a number, for example 12.5 for 12.5 percent.

What the output means

• Absolute Change shows new minus start.
• Percent Change shows the rate of change as a percent.
• Type shows Increase, Decrease, or No Change.
• Calculation shows the formula with your numbers.
• Verification appears in solve modes to confirm the result.

Limits and notes

• Use a nonzero starting value in Percent Change mode.
• Skip a percent change of negative one hundred in Find Starting Value mode.
• Decimals work, and negative numbers work.
• The display rounds to two decimal places.

Benefits and Use Cases

This percent change calculator speeds up routine work. It shows clear math and labeled results. You also get quick solve options for start or finish values.

• Prices and costs. Track price changes for goods or services.
• Investing. Check gains or losses on a stock or fund.
• Sales and revenue. Compare month to month or year to date.
• Budgeting. Review expense shifts and spot trends fast.
• Health and fitness. See weight or time changes with context.
• Grades and scores. Measure improvement across tests.

Use it for quick checks or for reports. It fits any case that needs a percent change or a missing value.

Real-Life Example

Percent change. Start at 200 and finish at 250. Absolute change equals 50, percent change equals 25 percent, type equals Increase.

Find starting value. Final value equals 125 and percent change equals 25 percent. Starting value equals 100, and the check confirms a 25 percent rise.

Find final value. Starting value equals 80 and percent change equals negative 30 percent. Final value equals 56, and the check confirms a 30 percent drop.

Final Thoughts

This percent change calculator keeps math clear and fast. You get the formula, labeled outputs, and handy solve modes. Enter your numbers, press calculate, and make a sound call with confidence.