FPGA Power Estimate Calculator
Work out fpga power estimate instantly with clear inputs, formula shown and shareable results.
About FPGA Power Estimate Calculator
FPGA dynamic power scales with used resources, clock frequency and toggle rate, following the same C V squared f relation as any CMOS logic. Static power is substantial in large devices and is set by the part and junction temperature, not the design.
Formula
FPGA power
dynamic = resources x C x V^2 x f x toggle rate; total = dynamic + static
Worked example
With the default values below, FPGA Power Estimate Calculator returns Total power of 3.55. Change any input above and every figure here is recalculated in your browser.
Inputs used
- LUTs used
- 84,000 LUTs
- Clock frequency
- 200 MHz
- Average toggle rate
- 12 %
- Static power
- 1.8 W
Results
- Total power
- 3.55 W
- Dynamic power
- 1.75 W
- Static share
- 50.74% %
- Dynamic power per LUT
- 20.81 µW
Step by step
- 1Values used
- 2FPGA power
- 3Total power= 3.55 W
- 4Dynamic power= 1.75 W
- 5Static share= 50.74 %
- 6Dynamic power per LUT= 20.81 µW
Assumptions and limits
- The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax or fees or charges 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
Why does toggle rate matter so much?
It is the activity factor. A design with 5% toggle rate uses less than half the dynamic power of one at 12% at the same clock frequency.
How do I reduce FPGA power?
Lower the clock where possible, gate or disable unused blocks, reduce routing distance for high-toggle nets, and choose a lower-power speed grade.
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