How to Calculate Your Calories Without an App

You don't need an app to know your calories. You need a pencil and two minutes.

Apps make calorie math feel like science you can't do yourself. That's by design. Subscriptions don't sell if the math is free. Here it is, free.

How do I calculate my calories without an app?

Multiply your bodyweight in pounds by 15. That number is your estimated daily maintenance calories. To lose fat, subtract 500. To build muscle, add 250. Track your weight for two weeks and adjust from there.

That's the whole framework. Everything below sharpens it.

Step 1: Find Your Maintenance Number

Maintenance is the number of calories that keeps your weight stable. Every goal starts here.

The fast method:

• Sedentary (desk job, no training): bodyweight in lbs × 13
• Moderately active (training 3 to 5 days a week): bodyweight in lbs × 15
• Very active (hard training plus an active job): bodyweight in lbs × 17

A 180 lb lifter training 4 days a week: 180 × 15 = 2,700 calories.

Write that number down. It's an estimate, not a verdict. Step 3 fixes the error.

Want more precision? Use Mifflin-St Jeor

The multiplier method is accurate enough for most people. If you want the equation researchers actually validated, use Mifflin-St Jeor ¹:

• Men: (10 × weight in kg) + (6.25 × height in cm) − (5 × age) + 5
• Women: (10 × weight in kg) + (6.25 × height in cm) − (5 × age) − 161

That gives your resting energy. Multiply by 1.4 to 1.6 if you train 3 to 5 days a week. The answer lands close to the simple method. Pick one. Don't do both.

Step 2: Set Your Goal Calories

Adjust maintenance based on what you're building.

• Fat loss: maintenance minus 500. Expect roughly 1 lb lost per week.
• Muscle gain: maintenance plus 250 to 300. Bigger surpluses build fat, not more muscle. We break that down in lean bulk vs dirty bulk.
• Not sure which goal? Read skinny fat: bulk or cut and pick a lane.

Set protein at 0.7 to 1 g per pound of bodyweight. Here's the exact protein math. Fill the rest with carbs and fats you'll actually eat.

Want to skip the arithmetic check? Run your stats through our free macro calculator. Same math, done in 30 seconds.

Step 3: Let the Scale Correct the Math

No formula knows your metabolism. The scale does.

1. Eat your target number for 14 days
2. Weigh yourself every morning, same conditions
3. Compare week 1 average to week 2 average

Cutting but weight is flat? Drop 200 calories. Bulking but gaining over 1 lb a week? Cut 200. Adjust every two weeks until the trend matches the goal.

This feedback loop beats any app. Apps estimate. Your bodyweight reports.

How accurate is calorie math without tracking every meal?

Accurate enough to win. Your starting number will be within 10 to 15 percent of reality, and the two-week scale check corrects the rest. Precision comes from adjusting to results, not from logging every almond.

What if the scale doesn't move?

Hold the line for a full 14 days before changing anything. Water, sodium, and stress mask fat loss day to day. If two weekly averages are identical, adjust by 200 calories and repeat. One flat week means nothing. Two means change the number.

The Math Is the Easy Part

You now know your numbers. Most people stall anyway, because the calories were never the real problem. The training and the structure were.

Your calories only work when they're attached to a program built around your stats, your schedule, and your equipment. That's exactly what we build.

References

Footnotes

1. Mifflin, M. D., St Jeor, S. T., Hill, L. A., Scott, B. J., Daugherty, S. A., & Koh, Y. O. (1990). A new predictive equation for resting energy expenditure in healthy individuals. The American Journal of Clinical Nutrition, 51(2), 241–247. https://doi.org/10.1093/ajcn/51.2.241 ↩