Percentage increase
80 × (1 + 25 ÷ 100)
New value = original × (1 + increase ÷ 100)
Formula
Original × (1 + percentage ÷ 100)
How the calculation works
Apply a percentage increase and find the new value. Enter each measurement in the unit shown beside the input. The result updates when you change a value; incomplete or unsupported inputs display an explanation.
Worked example
Increasing 80 by 25% gives 80 × 1.25 = 100.
When to use this calculator
Use this to apply a known growth rate to a starting quantity.
Common mistakes and limits
An increase and an equal decrease do not cancel because the bases differ.
Check your result
Check that all measurements describe the same object or time period. Repeat the calculation with unrounded values, then round only the final quantity to a precision suitable for the task.
Frequently asked questions
Does this calculator need an account?
No. Calculations run in your browser without an account.
How precise is the displayed result?
The display rounds to six decimal places. Measurement uncertainty can be larger than this rounding.
