Ram Latency Calculator – RAM Speed Calculator 2025
To calculate RAM latency, multiply the CAS latency (CL) by 2000, then divide the result by the DRAM frequency (DR).
The RAM Latency Calculator is a handy tool for determining your memory’s response time in nanoseconds. It helps assess how quickly your RAM can respond to data requests, a critical factor for gaming, video editing, and other high-performance tasks.
Formula
RL = CL × 2000 / DR
| Variable | Description | 
|---|---|
| RL | Latency of RAM in nanoseconds | 
| CL | CAS latency, representing memory cycles | 
| DR | DRAM frequency, typically in MHz | 
Solved Calculations
Example 1: DDR4 RAM with CL16 and 3200 MHz Frequency
| Step | Value | 
|---|---|
| CAS Latency (CL) | 16 | 
| DRAM Frequency (DR) | 3200 MHz | 
| Latency (RL) | (16 × 2000) / 3200 = 10 ns | 
Example 2: DDR5 RAM with CL36 and 4800 MHz Frequency
| Step | Value | 
|---|---|
| CAS Latency (CL) | 36 | 
| DRAM Frequency (DR) | 4800 MHz | 
| Latency (RL) | (36 × 2000) / 4800 = 15 ns |