Percentage Increase Calculator
Increase a number by a percentage, optionally compounding the increase several times, and see the total change.
Your inputs
Results
Increased value
280
- Amount added
- 30
- Total increase
- 12%
✓Exact calculation — rounded only for display
What this calculator does
Apply a percentage increase to a value — a price rise, salary raise or growth step — once or repeatedly.
Formula and method
Result = value × (1 + p)^times; Total increase = (1 + p)^times − 1
Worked example
Calculated by this tool with its default inputs:
Inputs
- Starting value: 250
- Increase: 12 %
- Apply the increase this many times (compounded): 1
Results
- Increased value: 280
- Amount added: 30
- Total increase: 12%
How to read the results
Repeated increases compound: two 10 % rises are a 21 % total increase.
Assumptions and limitations
- Use the percentage change calculator to find the percentage between two known numbers.
Questions
How do I add 20 %?
Multiply by 1.2.
Methodology and verification
- Result type
- Exact mathematical calculation (rounded only for display)
- Formula version
- 1.0
- Automated verification
- 3 reference and validation test cases, checked against independently computed values. The site cannot be built if any of them fail.
- Editorial review
- Awaiting human editorial review. The explanation was drafted with AI assistance; the formula and examples are verified by the automated tests above.
Privacy
Everything you enter is calculated in this browser and is not sent to Numerith or anyone else. Inputs are added to a share link only if you choose to include them. Privacy policy