Amdahls Law Calculator
Calculate theoretical speedup using Amdahls Law for parallel computing. Free technology calculator.
About This Calculator
Calculate theoretical speedup using Amdahls Law for parallel computing. Free online technology calculator for performance optimization and multi-core scaling.
This free online calculator is part of Calculys comprehensive tool suite. Results update instantly and can be shared via URL.
How It Works
Enter your values and click Calculate. The tool uses validated formulas to compute accurate results with interactive charts and a detailed breakdown table.
Frequently Asked Questions
What is Amdahls Law?
Speedup = 1 / ((1-P) + P/N). P = parallelizable portion, N = processors. Maximum speedup is limited by the sequential portion.
What is the maximum speedup?
If 90% is parallelizable, max speedup = 1/0.1 = 10x, regardless of how many processors are added.
Why doesnt adding more processors linearly increase speed?
Amdahls Law: the sequential portion (1-P) creates a bottleneck. Even with infinite processors, speedup is limited to 1/(1-P).
What is Gustafsons Law?
Gustafsons Law argues that problem size scales with processors, giving S = P + N(1-P). More optimistic than Amdahls Law.
How is this used in practice?
Used to predict parallel performance, optimize code, design multi-core systems, and determine optimal processor count for specific workloads.