Important: This tracks total weight. Focus on losing fat, not muscle, for the healthiest results. Use this figure as one part of your journey.
Weight Loss Percentage Calculator
Weight Loss Percentage Formula:
(Pounds Lost ÷ Starting Weight) × 100 = Percentage Lost
Your Weight Loss Percentage
0%
Important Note: This calculator measures total weight loss, which includes muscle mass. For a better understanding of your health progress, consider measuring body fat percentage instead.
Adding Percentages the Right Way (Why 20% + 10% Isn’t 30%)
Learn how to add percentages correctly and see why 20% plus 10% is not the same as a simple 30% change.
Why 20% + 10% Isn’t 30%
When you apply a 20% increase followed by a 10% increase, the second increase is calculated on the new value, not the original one.
Starting at 100, a 20% increase gives 120. A further 10% increase on 120 gives 132. The overall change from 100 to 132 is 32%, not 30%.
How to Add Percentages Correctly
To combine two percentage changes, turn each change into a factor. For example, +20% becomes 1.20, and +10% becomes 1.10.
Multiply the factors (1.20 × 1.10 = 1.32) and then convert the combined factor back into a percentage change by subtracting 1 and multiplying by 100.
Common Mistakes with Adding Percentages
A very common mistake is simply adding percentage figures together without accounting for compounding, especially with discounts, interest, and year‑on‑year price changes.
Another mistake is forgetting that a 20% increase followed by a 20% decrease does not bring you back to the starting point; it leaves you below where you started.
Adding Percentages Calculator
Enter a starting value and two percentage changes to see the final value and the true overall percentage change.
Sometimes in our day to day we want to know about percentage in different ways for instance percentage increase or decrease or a percetange withing a percentage.
For percentage increase this is where numbers can get a little complex and we may even try to use a calculator for this.
But before we do let’s lok at what the formula is and how it looks like on paper (ahum screen):
1. Find the Difference: Subtract the original value from the new value (New – Original).
2. Divide by Original: Divide the difference by the original value.
3. Multiply by 100: Convert to a percentage.
Example: A price goes from $35 to $45.50. ($45.50 – $35) / $35 \* 100 = 30% increase.
Here is another example of how to get a percentage increase: Price increases from $5 to $15. We do 15 – 5 then divide by 5 and multiply by 100 or mathetmatically this looks like: (15 – 5) / 5 * 100. This equals to 200 or a 200% increase from 5 to 15.
If you do however want to keep a handy increase or decrease percentage calculator try ours on this page here
Percentage Increase/Decrease Calculator
Percentage Increase & Decrease Calculator
Calculate percentage increases from a base value, or compare two values to find the percentage change between them
Percentage Increase Calculator
Calculate the new value after applying a percentage increase to the original number.
Calculation Result
Original Value: 0
Percentage Increase: 0%
Increase Amount: 0
New Value After Increase: 0
Formula Used
Increase Amount = Original Value × (Percentage / 100)
New Value = Original Value + Increase Amount
Percentage Change Calculator
Compare two values to find the percentage increase or decrease between them.
Calculation Result
Old Value: 0
New Value: 0
Change Amount: 0
Percentage Change: 0%
Change Type: No Change
Formula Used
Change Amount = New Value – Old Value
Percentage Change = (Change Amount / Old Value) × 100
How to Use These Calculators
Calculator 1 (Percentage Increase): Enter a starting number and the percentage you want to increase it by. The calculator will show you the increased amount and the new total value.
Calculator 2 (Percentage Change): Enter two values (old and new). The calculator will tell you the difference, whether it’s an increase or decrease, and the percentage change between them.
You can enter whole numbers or decimals. Click “Calculate” to see your results instantly!
