CONSORT Flow Diagram Generator

Figran

Enter your trial counts and download a CONSORT flow diagram that adds up.

  • CONSORT 2025 or 2010 wording
  • 2 to 4 arms
  • SVG, PNG, and canvas
Arms
Wording
Spelling
Enrollment
Arms

Appears as “Allocated to supervised exercise.”

Allocation

Follow-up

Analysis

Counts add up

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CONSORT 2025 flow diagram. 412 assessed for eligibility, 112 excluded, 300 randomized. supervised exercise: 150 allocated, 142 analyzed for primary outcome; usual care: 150 allocated, 139 analyzed for primary outcome.

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CONSORT diagram examples

Each CONSORT flow diagram here shows a fictional trial drawn by this generator. Load one to see how the counts map to the boxes, then replace them with your own.

Three-arm CONSORT flow diagram: 640 assessed for eligibility, 190 excluded, 450 randomized to low dose, high dose, or placebo, and 144, 143, and 143 analyzed.
Three armsNeurology · fictional trial

CONSORT flow diagram for three groups

Low-dose and high-dose treatment versus placebo for migraine prevention. One randomized box splits into three columns of 150 participants, each with its own losses and reasons.

640 assessed · 450 randomized · 430 analyzed

What a CONSORT flow diagram shows

Four stages follow every participant from the eligibility check to the primary analysis. Each box gives a count, and every loss or exclusion gives a reason.

Blank CONSORT 2025 template
Blank CONSORT 2025 flow diagram template with its four stages numbered

  1. Enrollment

    Everyone assessed for eligibility, the people excluded before randomization with reasons, and the number randomized.

  2. Allocation

    For each arm: how many were allocated, how many received the intervention as allocated, and why the rest did not.

  3. Follow-up

    Who discontinued the intervention and who was lost to follow-up for the primary outcome, with reasons.

  4. Analysis

    How many were included in the primary analysis, and why anyone was excluded from it.

What changed in CONSORT 2025

The 2025 template lists “Discontinued intervention” before losses, asks for losses “for primary outcome,” and labels the analysis box “Analysed for primary outcome.” CONSORT 2025 replaces the 2010 statement; switch the wording to 2010 only for a manuscript that started with the older template.

Checks that catch mismatched counts

The generator compares related boxes as you type. When numbers disagree, it shows which ones and by how much. It never blocks a download.

Enrollment adds up

Randomized equals assessed for eligibility minus excluded.

Assessed (412) minus excluded (112) is 300, but randomized is 290.

Arms add up to the randomized total

The allocated counts across all arms equal the number randomized.

Arms add up to 296 allocated, but 300 were randomized.

Each arm’s flow is consistent

Received plus did not receive equals allocated. Analyzed equals allocated minus losses and exclusions, or allocated minus exclusions when missing outcomes were imputed.

Supervised exercise: 150 allocated − 8 lost − 0 excluded is 142, but analyzed is 145.

Reasons match their totals

When every reason has a count, the counts add up to the box total.

Excluded: reasons add up to 108, but the total is 112.

Using the diagram in your trial report

The flow diagram is usually Figure 1 in the Results. CONSORT 2025 item 22 asks for it, together with losses and exclusions after randomization and their reasons.

Illustrative manuscript page

3.1 Participant flow

Between March 2024 and January 2025, 412 adults with knee osteoarthritis were assessed for eligibility and 300 were randomized: 150 to supervised exercise and 150 to usual care (Figure 1).

Primary outcome data were available for 142 participants in the exercise group and 139 in the usual care group. Reasons for discontinuation and loss to follow-up are shown in Figure 1.

CONSORT flow diagram placed as Figure 1 in a manuscript
Figure 1. CONSORT 2025 flow diagram of participants.
  • Cite it in the Results
  • Match the numbers in text and tables
  • Give reasons for losses
  • Name the CONSORT version

CONSORT flow diagram FAQ

Answers to common questions about the diagram and this generator.

What is a CONSORT flow diagram?

A CONSORT flow diagram shows how participants moved through a randomized trial: how many were assessed for eligibility, excluded, randomized, and allocated to each arm, and how many discontinued, were lost to follow-up, and were analyzed. It is also called a CONSORT diagram or CONSORT flow chart. Item 22 of the CONSORT 2025 checklist asks trial reports to include one.

Which CONSORT version does this generator follow?

CONSORT 2025. The box wording here matches its flow diagram template. If your manuscript uses the older template, switch the wording to CONSORT 2010 to draw a CONSORT 2010 flow diagram. See the CONSORT 2025 statement (BMJ 2025;388:e081123) and the official CONSORT site. Figran is not affiliated with the CONSORT group.

Can I download a blank CONSORT diagram template?

Yes. Choose Clear all counts and leave the counts empty, so every box shows “(n= )”, then download the SVG or PNG. Clear the arm names too if you want “Arm A” and “Arm B” instead of the example’s names. The blank template follows the wording (CONSORT 2025 or 2010) and the number of arms (2 to 4) you choose.

How do I make a CONSORT flow diagram for three groups?

Choose 3 arms and give each arm a name. The randomized box splits into three columns, and each column has its own allocation, follow-up, and analysis counts. The generator checks that the three allocated counts add up to the number randomized. Four arms, such as a 2×2 factorial trial, work the same way.

What does the generator check, and what doesn’t it check?

It checks the arithmetic between related boxes, reason counts against their totals, and duplicate arm names. It doesn’t review your trial against the CONSORT checklist or certify a report. Warnings never block a download.

Do I need an account?

No. Entering counts and downloading SVG or PNG files works without signing in, and your counts stay in your browser. To keep editing the diagram box by box, choose Edit in canvas and sign in.

Can I edit the diagram in Word or PowerPoint?

Yes. Insert the SVG into Word or PowerPoint; Microsoft 365 can convert it to shapes for editing. The PNG is 300 DPI, so it stays sharp in print. To change individual boxes and arrows, use Edit in canvas.

Is a CONSORT flow diagram the same as a PRISMA flow diagram?

No. A CONSORT diagram follows participants through a randomized trial. A PRISMA diagram follows records and studies through the screening stages of a systematic review. To draw one, use the PRISMA Flow Diagram Generator.

Preparing a trial report or manuscript?

Enter your counts, fix any mismatches, and download the flow diagram for your Results section.

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