Use this free spoon theory calculator to compare the activities you are considering with your own estimate of today’s capacity. Keep a reserve unassigned, change task costs and download a personal energy budget. No account is required.
Spoons are a metaphor for limited capacity, not a clinical unit. Twelve is an example, not a daily target. The spoon-theory energy budgeting guide explains where the metaphor comes from and how to adapt the estimates.
Build your personal energy budget
Choose your own units, leave a reserve and compare the activities you are considering. These are personal estimates, not measured energy or medical advice.
Enter your estimates, then check the budget.
Your entries stay in this page session and are lost on refresh. This tool has no account, automatic saving or device sync. Download or print before leaving. Other website services have separate privacy practices. A spare spoon is not proof that more activity is safe.
How to use the energy budgeter
1. Choose available spoons. Use a number that helps describe the capacity you want to plan around today. You can enter zero. The calculator accepts half-spoon steps from 0 to 100; this is an input range, not a health scale.
2. Leave a reserve. Set aside some of that total for uncertainty. The reserve cannot be greater than your available estimate. It is already part of the total, not extra capacity.
3. Name activities and estimate their whole cost. Include preparation, travel, social effort and cleanup where relevant. Change every starter row to suit your situation, remove unused rows or add up to 20 activities. A named zero-cost activity is allowed. A blank row must have zero cost.
4. Check the budget. The calculation is available spoons minus reserve minus the sum of activity estimates. A negative result shows the amount by which the entered plan exceeds the entered budget. A nonnegative result only means the arithmetic fits your choices.
5. Revise and keep a copy. Reduce, defer, simplify or ask for help with a task when the plan is overfull. Download the text plan or print it before leaving. Editing any input hides the old result until you check again.
The 12-spoon worked example
The starter activities total 10 spoons: wash and dress (1), prepare breakfast (1), a small laundry load (2), grocery trip including travel (3), an important message (1) and simple dinner preparation (2). With 12 available and 2 reserved, 12 – 2 – 10 = 0 unassigned beyond reserve. Your two-spoon reserve remains unallocated.
Change available spoons to 8 while keeping reserve at 2. The same activities now exceed the entered budget by 4 spoons. Deferring the small laundry load removes 2. Replacing the grocery trip with help that you estimate at 1 instead of 3 removes another 2. The revised activities total 6, so 8 – 2 – 6 = 0. This is an arithmetic illustration, not advice about a safe amount of activity.
What this calculator does and does not tell you
There is no universal cost for a shower, an email or a shopping trip. Costs can differ across people and across days. The budgeter does not diagnose fatigue, measure biological energy, treat ADHD or prevent burnout. Rest does not automatically credit more spoons in this tool. Stop or change the plan when circumstances or symptoms require it, even when numbers appear to fit.
For people with ME/CFS, the CDC describes individualized activity management and delayed post-exertional symptoms. A generic calculator cannot replace a care plan or determine safe exertion. Seek appropriate clinical advice for persistent, new or worsening symptoms.
Saving and downloads
Entries remain only in this page session and are lost on refresh. There is no automatic saving, cross-device synchronization or account. Download creates a text file containing the current activities and checked totals. Keep personal or health details out of task names if you do not want them on a shared screen or in a saved file. Other website services have their own privacy practices.
Choose the planning tool for the question
For clock time and transitions, use the Time Blindness and Buffer Calculator. To organize a project with smaller obligations, try the 3-3-3 Method Planner. If you need a smaller starting action, open the Task Paralysis Breaker. A reusable notebook is a separate option in the WebToolBase digital planner shop.