A busy relationship capacity calculator does one thing. It turns a feeling you cannot win an argument with into a number you can. You name the minimum protected time you need each week, you count the protected time he actually delivered across the last month, and you set the two side by side. If what he protects meets what you need, the capacity is real. If the gap is chronic, the capacity is not there right now, and no amount of how busy he is or how much he means it changes the math.
I run several businesses, which makes me the exact man this tool was built to measure. When I go quiet, when I push a plan, when I answer at midnight instead of noon, I know precisely what is happening on my side of the screen, because I am doing it to someone too. My team also runs an operation with thousands of conversations weekly, and I watch women reach for the wrong instrument every single day. They measure his feelings. They measure his words. They measure how busy he says he is. None of those is capacity.
Capacity is what he protects when everything else is pulling at him.
That is a number. Let me show you how to get it.
Hours are the wrong unit. Attention is the unit
Before you count anything, throw out the hour.
Here is why the hour lies to you. The average adult already sits inside a huge amount of unused togetherness. The Bureau of Labor Statistics reports that people get about five hours of leisure on an average day and spend only about 35 minutes of it socializing and communicating, with more than half of all leisure going to television. Read that again. Five hours available, thirty-five minutes spent connecting. Most of the time two people are in the same room, they are not in the same conversation.
So "how many hours does he give me" measures the wrong thing. A man can be home every night and present for none of it. Another man can travel three weeks a month and be more inside your life than the first one.
What actually moves a relationship is narrower and better documented. A study of couples' daily time found that the ones who spent a larger proportion of their time together talking reported greater satisfaction, more positive qualities in the relationship, and greater closeness. Not more hours. A larger share of the hours spent on real attention.
That is the whole reason this calculator counts windows instead of clock time.
The Needs-vs-Protected-Windows calculator
Here is the instrument, in one definition you can run tonight.
A protected window is a specific thing, and the definition is strict on purpose.
A protected window is a block of time he scheduled in advance, kept without you chasing it, and stayed mentally present for. A phone face down. A conversation that is about the two of you, not a running commentary on his inbox. A real date, a genuine planning call, an unhurried morning, a night that was on the calendar before the day it happened.
Everything else is co-presence, and co-presence does not count. Him scrolling next to you does not count. A "you up" at 11:40 does not count. A dinner where he took two work calls does not count. A last-minute "come over" that only happened because his other plan fell through does not count. Those things can feel like time together. The calculator does not care how they feel. It counts what was protected.
Step one. Set your Needs number
Your Needs number is yours, and no article gets to assign it to you.
Pick the smallest number of protected windows per week that would make you feel chosen rather than squeezed in. For one woman that is two. For another it is four. For another it is one deep window plus daily contact that does not have to be a window at all. There is no correct answer and there is no figure that makes you needy, so do not let anyone, including him, talk you into a number lower than the one you actually feel.
Write it down before you look at his behavior. This part matters more than it sounds. If you set your Needs number after you count his windows, you will quietly lower it to match what he already gives, and the whole measurement collapses. Name what you need in the abstract first. Then go measure reality against it.
One rule keeps this honest. Your Needs number is a floor, not a wish. It is not the relationship you fantasize about on a good day. It is the minimum below which you stop feeling like a partner and start feeling like an option.
Step two. Count his Protected Windows
Now the cold part. Go back four weeks and count.
Do not count what he promised. Do not count what he meant to do. Do not count the stretch when he was "normally" attentive before all this started. Count the protected windows that actually happened in the last twenty-eight days, using the strict definition above, then divide by four. That average is his Protected Windows number.
Be ruthless about the disqualifiers, because your hope will try to round up. A canceled window is a zero, not a half. A window he showed up to but spent half elsewhere is a half at best. A window that only happened because you begged for it tells you about your effort, not his capacity, so it does not count toward his number.
If his number comes back low and you suspect it is a scheduling problem rather than a caring problem, there is one clean way to test it. You ask for a single recurring window and you watch what he does with the request.
SEND THIS TO PUT ONE WINDOW ON THE CALENDAR
I want one thing that is ours and does not move. Same night each week, phone away, one hour. If work eats it, we rebook it inside the same week, not next month. Can we lock that in?
His answer is data. A man with capacity and interest treats that as easy. A man missing one or the other will negotiate it down, agree and never protect it, or turn it into a conversation about how unfair the request is. You are not measuring the yes. You are measuring what happens to the window over the next month.
Reading the result
You now have two numbers. Set them next to each other. There are three results.
Surplus. His Protected Windows meet or beat your Needs number, consistently, without you managing it. This is capacity. Busy or not, he is protecting enough real attention to sustain a relationship, and your job is to stop auditing and start being in it. Do not turn a healthy number into an excuse to keep testing him.
Break-even. He lands right at your Needs number, but only when you drive every plan. That is not capacity, that is your labor wearing a costume. Hand the planning back for a month and re-count. If the number holds without your engine behind it, it was real. If it collapses, you were the capacity, not him.
Deficit. His Protected Windows sit below your Needs number, month after month, and the recurring-window test did not move it. This is the result most women are afraid to write down. The capacity is not there right now. Not because he is a bad man, not because you asked wrong, but because what he protects is smaller than what you need, and a gap that survives a full month and a direct request is a lifestyle, not a phase.
A deficit does not require a villain. It only requires a decision.
What the number cannot tell you
This is a calculator, not an oracle, and being honest about its limits is what makes it worth running.
The number tells you how much real attention he protected. It does not tell you why. It cannot diagnose whether he is overwhelmed, avoidant, keeping his options open, or simply built for less closeness than you want. You will be tempted to reverse-engineer his motive from a low number, and you should not, because the motive changes nothing about whether your need is met.
The number also does not promise a future. A surplus this month does not guarantee next month, and a deficit during a genuine crisis does not doom the whole relationship. What the tool gives you is a clean read of the present, stripped of his explanations and your hope. It answers "is the capacity here now," and that is the only question you can actually act on. If you need to weigh whether the arrangement is sustainable over time, or whether love is being asked to cover for a lack of time, those are the next reads, and they start from the number, not instead of it.
You do not get certainty about him. You get clarity about the offer.
Run it tonight
You can do this before you fall asleep.
Set your Needs number in the abstract. Count his protected windows over the last four weeks, ruthlessly. Compare. If you are still unsure how high to set your floor, how much availability is enough walks the floor question in detail, and quality time versus quantity is the case for why the windows beat the hours. If the number comes back a deficit and you are being told you want too much, how much you should accommodate during a busy season draws the line between a season and a standard.
The calculator will not tell you to stay or go. It does something better. It makes the choice yours, backed by a number instead of a mood, and it stops you from spending another month negotiating with a feeling you were never going to win.
You already know how he makes you feel. Now you will know what he actually protects.