Tempo Change
Speed up or slow down a track by a percentage of its BPM.
About Tempo Change
A percentage tempo change scales the original BPM by one plus the fraction, so a ten percent raise on 120 yields 132. Working out a target tempo before warping or resampling prevents compensating errors and keeps the feel intact.
Formula
Tempo Change
New BPM = original x (1 + change%)
- change
- Percentage to speed up (positive) or slow down (negative)
Worked example
With the default values below, Tempo Change returns New Tempo of 132.0. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Original tempoaccepts 20–300 BPM
- 120 BPM
- Tempo changeaccepts -100–100 %
- 10 %
Results
- New Tempo
- 132.0 BPM
- Tempo Change
- 12.0 BPM
- New Beat Length
- 454.55 ms
Step by step
- 1Values used
- 2Tempo Change
- 3New Tempo= 132.0 BPM
- 4Tempo Change= 12.0 BPM
- 5New Beat Length= 454.55 ms
Assumptions and limits
- The result is derived only from the 2 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
- Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
How is Tempo Change calculated?
New BPM = original x (1 + change%) A percentage tempo change scales the original BPM by one plus the fraction, so a ten percent raise on 120 yields 132.
Why does Tempo Change matter?
Working out a target tempo before warping or resampling prevents compensating errors and keeps the feel intact.
What values do I need to enter?
This calculator takes 2 inputs: Original tempo, Tempo change. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.