Estimate the whole chain, not the core task
List every step from first action to submission, estimate each, then apply how far off you were last time. What comes out is a number you can plan around.
The short version
- You do not underestimate the core task by much. You underestimate everything hanging off it, the finding, the formatting, the upload that fails, the twenty minutes of not starting. So this tool asks you to list the whole chain, step by step, and estimate the list rather than the task.
- Then it applies one honest number: how far off your last guess was. If a job you called an hour took three, you were off by three, and this multiplies your total by that. Estimating from what happened beats thinking harder about the estimate.
- It hands back a realistic total and an evidence-based line for the conversation about the deadline. Nothing is saved. It rearranges what you type and gives it back.
Knowing about the bias does not remove it, people underestimate their own tasks even after being shown that they do. What helps is boring and it works: count the steps between the first action and pressing submit, estimate each one, and multiply by how wrong you were last time. Most of the missing time lives in the steps you would not have listed.
Before you begin
Pick one task with a deadline attached, the essay, the report, the application. Have a rough sense of how long a similar job took last time. Nothing you type is saved.
Build your estimate
Step 1 of 3
Your realistic estimate
Realistic total
The chain you listed
Copy it somewhere it will survive
Select the text below and copy it into whatever you already use. This page keeps nothing.
A line to negotiate with
Deadlines are often set by someone who has never done the task, or did it years ago under different conditions. That is missing information, and missing information can be supplied. Negotiate on evidence, not on feeling, the line below is built from your own numbers, ready to send.
Then ask for a structural change rather than a personal favour: a staggered deadline, a published expected workload, or a checkpoint partway through. Those are much easier to grant than an individual extension.
Worth knowing. This is the planning fallacy, from Buehler, Griffin and Ross (Journal of Personality and Social Psychology, 1994). The finding that matters is the specific one: people underestimate how long their own tasks will take even when they know they have done so before. It is well established, and it is why this tool works from your recorded multiplier and the whole chain of steps rather than from thinking harder about the number.
Nothing here is saved or sent anywhere. What you type exists only while this page is open.
Written for Thought Club as general guidance, not medical advice. Free to read, print, and share.