Latency Percentile Calculator

Compute P50–P99.9 latency percentiles and basic stats from a dataset, with a tail-latency warning.

Runs 100% in your browser. Nothing you enter is uploaded or stored.

DatasetPaste your measurements separated by newlines, commas, or spaces. Non-numeric values are ignored.UnitJust a label for display (e.g. ms, s, req).

P50

42.5 ms

P75

67.25 ms

P90

113.5 ms

P95

153.75 ms

P99

286.75 ms

P99.9

316.68 ms

Count

Min

12 ms

Max

320 ms

Mean

64.3 ms

Heavy tail detected. P99 (286.75 ms) is at least 3x your median (42.5 ms). A small share of slow requests is dragging the tail far from the typical experience. Look at what those outliers have in common.

Related tools

Little's Law Calculator

Solve Little's Law for capacity planning: concurrency = throughput × latency.

Token Bucket Rate-Limit Simulator

Simulate token-bucket rate limiting and visualize throttling under a request pattern.

RPS Converter

Convert between requests/sec, per-minute, daily, and monthly volumes with a peak-factor adjustment.

Metric Cardinality Estimator

Estimate time-series cardinality and rough cost from metric and label dimensions.

Trace Sampling Calculator

Pick a tracing sample rate that balances visibility against span volume and cost.

SLA Uptime Calculator

Turn an SLA target like 99.9% into the exact downtime you're allowed per day, week, month, and year.

From the makers of these tools

Run production tasks with agents you can trust.

BitSentry turns recurring investigations into reusable runbooks your agents follow step by step, with AI-explained evidence and a full audit trail.

Try BitSentry Desktop Free