Enter a kit’s transfer rate in MT/s and CAS latency in cycles. The calculator returns CL × 2,000 ÷ MT/s in nanoseconds. It compares one timing component, not total memory latency or game FPS.
How the calculation works
Double-data-rate memory transfers data twice per clock cycle. Dividing the transfer rate by two gives the clock frequency used by this timing calculation. Multiply the number of CAS cycles by the duration of one cycle to express the interval in nanoseconds.
For DDR5-6000 CL30, the calculation is 30 × 2,000 ÷ 6,000 = 10 ns. For DDR5-6000 CL36, it is 12 ns. Those example values are arithmetic results, not measurements of a computer.
What you can compare
Compare advertised profiles at their stated transfer rate and CL, or enter values you have actually configured. Keep capacity, module count and the rest of the kit timings alongside the result when evaluating a purchase.
A 2 ns difference in this calculation does not translate into a fixed game-performance gain. This tool does not account for other timings, the memory controller, cache, queueing or a particular workload.
Inputs and unsupported cases
Use MT/s rather than a clock-frequency reading. A tool showing a memory clock of 3,000 MHz can correspond to 6,000 MT/s DDR operation; entering 3,000 as the transfer rate would produce the wrong comparison.
Positive finite values are required. This tool applies to DDR memory CAS arithmetic, not graphics-memory performance, storage latency, SRAM or an end-to-end system benchmark. It does not validate that a chosen overclock will work.
Use the result in a purchase decision
Verify generation, form factor, capacity and platform support before considering a timing difference. A kit with a lower calculated CAS interval can still be unsuitable for your motherboard or workload.
Save the kit number and intended profile with your parts list. If you find an error in the formula or a catalog timing, report the inputs, expected result and a source through our correction process. Formula reviewed October 3, 2026.
Sources
Research checked October 3, 2026. Specifications are published data; calculations are illustrative; no hands-on benchmark results or current retailer prices are claimed.