CalculatorShelf
Home / Storage Calculators / Memory Timing Calculator

Memory Timing Calculator

Last reviewed: June 24, 2026 · Formula version: MEMORY_TIMING-1.0 · Formula-backed planning calculator

Calculate true RAM latency

Convert DDR data rate and timing values into true latency in nanoseconds so memory kits can be compared more fairly.

Server-rendered example result

Example: Input: DDR5-6000, CL30, tRCD 36, tRP 36, tRAS 76. Output: CAS 10.0 ns, tRCD 12.0 ns, tRP 12.0 ns, tRAS 25.33 ns.

The interactive result cards update this example when JavaScript runs, but this default snapshot is crawlable and printable.

Quick answer

DDR5-6000 CL30 has a cycle time of 0.333 ns and a CAS true latency of about 10 ns. Higher frequency can offset higher timing numbers.

Best for: comparing realistic scenarios before acting. Not for: final professional approval, emergency decisions, or replacing product labels and local requirements.

How to use the calculator

  1. Enter the measurements, quantities, costs, or target values requested above.
  2. Adjust optional assumptions such as waste, overhead, product strength, retention days, or multipliers.
  3. Read both the main result cards and any warning notes. The warnings are part of the answer, not fine print.
  4. Use the share, copy, or print/PDF controls when you want to save the scenario.

What the results mean

The first result card is the primary decision number. Supporting cards explain capacity, cost, efficiency, safety margin, input assumptions, or the next value to check. When the page returns a range, treat it as a planning envelope rather than a guaranteed price.

Formula / methodology

Cycle time in ns = 2000 ÷ data rate in MT/s. CAS latency ns = CL × cycle time. The same method applies to tRCD, tRP, and tRAS.

Assumptions and limitations

  • Inputs are assumed to be measured accurately and entered in the units shown.
  • Rounding is intentional so the result is easier to use in real decisions.
  • Vendor-specific behavior, local code, product labels, and regional pricing can override a generic calculator.
  • High-risk medical, legal, tax, and emergency calculators are intentionally not published without expert review.

Example calculation

Input: DDR5-6000, CL30, tRCD 36, tRP 36, tRAS 76. Output: CAS 10.0 ns, tRCD 12.0 ns, tRP 12.0 ns, tRAS 25.33 ns.

Server-rendered example result

Example: Input: DDR5-6000, CL30, tRCD 36, tRP 36, tRAS 76. Output: CAS 10.0 ns, tRCD 12.0 ns, tRP 12.0 ns, tRAS 25.33 ns.

The interactive result cards update this example when JavaScript runs, but this default snapshot is crawlable and printable.

Common mistakes

  • Comparing CL numbers without frequency.
  • Assuming lower CL always means lower real latency.
  • Ignoring platform stability and memory controller limits.
  • Comparing XMP/EXPO kits without checking supported speeds.

FAQ

What formula does this page use?

Cycle time in ns = 2000 ÷ data rate in MT/s. CAS latency ns = CL × cycle time. The same method applies to tRCD, tRP, and tRAS.

What changes the result the most?

The most important inputs are the size, count, rate, target, or unit assumptions shown in the calculator.

Is this a final professional answer?

No. Treat it as a planning result and verify important decisions against product documentation, labels, quotes, local code, or professional guidance.

Why does this page show warnings?

Warnings call out assumptions that can materially change the result or create safety, cost, or reliability problems.

Can I share this scenario?

Yes. The share button copies a URL with the current inputs, while the canonical page remains the base calculator URL.

Last reviewed

Last reviewed: June 24, 2026. Formula version: MEMORY_TIMING-1.0. Index status: indexable.