How to Work Out Your Maintenance Calories
If you’ve ever tried to lose weight, you’ve probably heard people talking about “maintenance calories”. You might even have been told to eat at maintenance for a while after dieting or to find your maintenance before deciding whether to lose, gain or maintain your weight.
But what actually are maintenance calories?
And more importantly, how do you work out yours?
The truth is that no calculator can tell you your exact maintenance calories. They can give you a good starting point, but everyone’s body is slightly different. Hormones, muscle mass, medications, health conditions and even how much you fidget during the day all affect how many calories you burn.
The good news is that finding your maintenance calories isn’t as complicated as it sounds.
What Are Maintenance Calories?
Your maintenance calories are simply the number of calories your body needs to stay at roughly the same weight. If you eat around this amount consistently, your weight should stay fairly stable over time.
Eat more than your maintenance calories and you’ll usually gain weight.
Eat less than your maintenance calories and you’ll usually lose weight.
That sounds straightforward, but real life is rarely quite that simple. Our bodies naturally fluctuate from day to day because of water, hormones, digestion and many other factors. That’s why it’s important to look at trends over several weeks rather than panicking over one set of scales.
Why Knowing Your Maintenance Calories Can Help
Not everyone wants to lose weight.
Some people have reached a weight they’re happy with and simply want to maintain it. Others may have been dieting for a long time and need a break before deciding what to do next.
Knowing your maintenance calories can help you:
- Maintain your current weight
- Decide on a sensible calorie deficit if you want to lose weight
- Increase calories gradually after dieting
- Avoid accidentally undereating
- Understand your body’s energy needs a little better
It’s simply another tool that can help you make informed choices.
How to Estimate Your Maintenance Calories
The easiest place to start is with an online calorie calculator.
These calculators usually ask for:
- Age
- Sex
- Height
- Weight
- Activity level
They estimate how many calories your body burns each day, including both basic bodily functions and physical activity.
Treat this number as exactly that—an estimate.
Some people will find it’s surprisingly accurate.
Others may need to adjust it by a couple of hundred calories in either direction.
The Most Accurate Way to Find Your Maintenance Calories
In my opinion, the best way isn’t using a calculator at all.
It’s watching what actually happens.
For two or three weeks:
- Eat roughly the same number of calories each day.
- Weigh yourself regularly (daily or a few times a week).
- Look at the overall trend rather than individual weigh-ins.
If your weight stays about the same, you’re probably eating close to maintenance.
If you’re gradually losing weight, you’re likely eating below maintenance.
If you’re gradually gaining weight, you’re probably eating above it.
It takes a little patience, but it’s much more personalised than relying on an online formula.
Why Your Maintenance Calories Change
One thing many people don’t realise is that maintenance calories aren’t fixed for life.
They change.
As your weight changes, so does the amount of energy your body needs.
Generally speaking, a smaller body requires fewer calories than a larger one.
Your maintenance calories may also change if:
- You become more active.
- You build muscle.
- You retire or change jobs.
- You start or stop certain medications.
- Your hormones change.
- You age.
That’s completely normal.
There’s no single maintenance calorie number you’ll use forever.
What About Fitness Watches?
Many smart watches estimate how many calories you’ve burned each day.
I find these interesting, but I wouldn’t rely on them completely.
Different watches often produce very different results, and they’re not always accurate for strength training, cycling or everyday movement.
They can be useful for spotting trends in your activity levels, but I wouldn’t use them as permission to eat several hundred extra calories every time they say you’ve had an active day.
Do You Need to Count Calories Forever?
Definitely not. Some people enjoy tracking. Others hate it. For many people, calorie counting is simply a temporary tool while they learn about portions and eating habits.
Eventually, plenty of people move away from tracking completely.
Personally, I’ve been through periods where I tracked everything I ate and periods where I tracked nothing at all. I’ve learned that knowing roughly what maintenance looks like is useful, but becoming obsessed with exact numbers isn’t particularly healthy for me.
As with most things, it’s about finding what works for you.
Common Mistakes When Working Out Maintenance Calories
Expecting One Perfect Number
Your maintenance calories aren’t a magic figure that’s exactly the same every single day. Some days you’ll naturally burn a little more. Some days a little less. That’s normal.
Overestimating Activity
Most of us think we’re a little more active than we really are.
When using calculators, it’s often better to choose the lower activity level unless you’re exercising hard several times a week or have a physically demanding job.
Forgetting About Weekends
Many people eat one amount Monday to Friday and something completely different at weekends.
It’s your average intake across the whole week that matters most.
Chasing Daily Scale Changes
Water retention can easily cause the scales to move by a couple of pounds overnight.
That doesn’t mean your maintenance calories suddenly stopped working.
Always look at longer-term trends.
Frequently Asked Questions
How many maintenance calories should a woman eat?
There’s no single answer.
For many women it may fall somewhere between 1,800 and 2,400 calories per day, but height, weight, age and activity levels make a huge difference.
How many maintenance calories should a man eat?
Many men maintain somewhere between 2,200 and 3,000 calories per day, but again, this varies enormously.
Can maintenance calories change?
Yes. Weight, activity levels, muscle mass, age and health can all affect how many calories your body needs.
Should I eat maintenance calories every day?
You don’t have to be exact.
Your body doesn’t reset at midnight.
Looking at your average intake over a week is usually much more useful than worrying about one day being slightly higher or lower.
My Experience with Maintenance Calories
For years, I thought the goal was simply to lose weight.
Nobody really talked about what happened afterwards.
Once I’d lost 10 stone, I discovered that maintaining weight can actually be one of the hardest parts of the journey. It isn’t about eating as little as possible forever. It’s about finding an amount of food that keeps you healthy, satisfied and able to enjoy life without constantly feeling like you’re on a diet.
I’ve also learned not to become obsessed with calculators. They’re useful starting points, but they don’t know whether you’ve barely slept, whether you’re taking medication that affects your appetite or whether you’re naturally someone who never sits still.
Your body is far more individual than any online formula can ever be.
If you’re trying to work out your maintenance calories, use the calculators as a guide, pay attention to what your own body is telling you and don’t be afraid to make small adjustments along the way.
After all, the best maintenance calorie target is the one that works for your body, not someone else’s.
