Error Rate

How to use this calculator

1. Enter failed requests in count.
2. Enter total requests in count.
3. Select Calculate and keep the output unit with the answer.

Before you use the answer

Write down whether a size uses decimal or binary prefixes and whether a rate counts bits or bytes. Compare the same system boundary on both sides of a performance calculation. Measured throughput is usually a more useful planning input than the maximum number on a product label.

Agree on which status codes or outcomes count as failures before using the metric.

Does it save my inputs?

No calculation history is stored by this website. The calculator works locally in your browser. See the privacy policy for hosting and contact details.

Why might a result be approximate?

Measurement uncertainty, ideal-model assumptions and floating-point rounding can all matter. Displaying more digits does not improve the original measurement.