Deployment Frequency Calculator
Turn a count of production deployments into a rate per day and week.
In short
Formula: Deployment frequency = Deployments to production / Length of the period
What this calculator does
The DORA deployment frequency, expressed as a rate rather than placed in a performance band. The mean gap between deployments is the period divided by the count.
Use it to turn Deployments to production, Length of the period into a checked result you can compare, copy, or rerun with different assumptions.
The page shows the formula, a numeric worked example, and the assumptions that affect this professional & industry calculation.
Inputs and what they mean
- Deployments to production
- — Deployments that reached production in the period..
- Length of the period
- — Days the count covers..
How to use it
- Enter your own figures — the calculator never fills in a rate, price or benchmark for you.
- Press Calculate to see the result.
- Read the formula, variables, assumptions and source below the result before you rely on it.
Formula
Deployment frequency = Deployments to production / Length of the period.
Inputs used: Deployments to production, Length of the period.
Edge handling: Deployments to production is required.; Deployments to production cannot be negative.; Deployments to production must be no more than 1000000000000.; Length of the period is required.; Length of the period cannot be negative..
Worked example
86 production deployments in 30 days
- Start with Deployments to production: 86, Length of the period: 30.
- Apply the method: Deployment frequency = Deployments to production / Length of the period.
- A rate over your own period. It is not compared with any performance band.
Reading the result
The headline figure is the main answer. Any breakdown underneath shows the parts that make it up, so you can check the working and see what changes when you adjust an input.
Limitations and assumptions
- Inputs outside the supported range are rejected rather than forced into a result.
- The result depends on the values you enter for this deployment frequency calculator; it does not supply missing rates, rules, prices, dates, or assumptions for you.
Reference: DevOps Research and Assessment, Google Cloud — DORA metrics: the four keys
Last reviewed:
Common questions
Where does this formula come from?
Deployment frequency is deployments to production divided by the length of the period; change failure rate is the share of changes to production that cause degraded service requiring remediation; failed deployment recovery time is the time taken to restore service after such a change. See the source link on this page.
What kind of calculation is this?
Production deployments divided by the days they were made over, with the mean gap between deployments. Check the formula, example, and limitations on this page before using the result for a real professional & industry decision.
What are its limits?
Arithmetic over the figures entered — it cannot tell whether the underlying monitoring, incident records or change records are complete. A mean over a short period, or over few events, is a weak description of behaviour. A rate says nothing about the size or risk of each deployment.
How do I use the Deployment Frequency Calculator?
Enter the required values for Deployments to production, Length of the period. The calculator applies the formula on this page and shows the main result with any supporting breakdown so you can check the arithmetic.
What formula does the Deployment Frequency Calculator use?
Deployment frequency = Deployments to production / Length of the period The visible formula section above lists the calculation path and the edge cases the page handles, so the result can be checked without relying on the form alone. Check the formula, example, and limitations on this page before using the result for a real professional & industry decision.
Can the Deployment Frequency Calculator be used for exact decisions?
Use it as a calculation aid, not as a substitute for checking the underlying rule, contract, policy, or professional advice that applies to your situation. When a result depends on local rules, personal details, prices, or dates, enter those values yourself and confirm them before acting.
Formula, source and verification
Production deployments divided by the days they were made over, with the mean gap between deployments.
The question it answers: What is our deployment rate, what share of changes fail, and how long does recovery take?
The formula
Deployment frequency = Deployments to production / Length of the period
- d — Deployments
- (count). Deployments that reached production.
- P — Period
- (days). Days the count covers.
Units: Counts and days in; deployments per day, per week and per 30 days out.
What kind of calculation this is
Deterministic formula. The same inputs always give the same answer. The maths is fixed and does not depend on judgement.
Method
The DORA deployment frequency, expressed as a rate rather than placed in a performance band. The mean gap between deployments is the period divided by the count.
Assumptions built into the result
- Mathematical: The figures entered all cover the same measurement period.
- Mathematical: Incidents, changes and requests are counted consistently with the definition the team has written down.
- Mathematical: Only deployments that actually reached production are counted.
Figures this calculator will never guess for you
- No target, benchmark, industry average or performance band is supplied for any figure.
- A definition is never presented as a goal: the availability formula is not an availability target, and the change failure rate formula is not an acceptable failure rate.
- No elite, high, medium or low classification is applied.
Limitations
- Arithmetic over the figures entered — it cannot tell whether the underlying monitoring, incident records or change records are complete.
- A mean over a short period, or over few events, is a weak description of behaviour.
- A rate says nothing about the size or risk of each deployment.
Source and version
- Standard or reference
- DORA metrics — the four keys — DORA (Deployment frequency is deployments to production divided by the length of the period; change failure rate is the share of changes to production that cause degraded service requiring remediation; failed deployment recovery time is the time taken to restore service after such a change.)
- Published source
- DevOps Research and Assessment, Google Cloud — DORA Metrics Guide
- Formula version
- Version 1
- Verification
- Reviewed against the cited source on
- How much weight the source carries
- Academic
- Applies to
- Currency
- The result is a ratio or index, so it does not depend on currency.
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