You're counting calories, you're in a "deficit" on paper, but the scale isn't moving. Here's why.
Mistake 1: Measuring by Volume Instead of Weight
1 cup of oats can be 85g or 105g depending on how tightly packed. That's a 25% calorie difference. Always weigh food on a kitchen scale — apps like MyFitnessPal are worthless without accurate input data.
Mistake 2: Not Logging Cooking Oils
One tablespoon of olive oil is 120 calories. Most people use 2–3 tablespoons when cooking without logging it. That's an invisible 240–360 calories per meal.
Mistake 3: Trusting "Healthy" Labels
"A handful of almonds is healthy." 30g of almonds = 170 calories. Most people eat 50–60g = 290 calories. "Healthy" doesn't mean "low calorie."
Mistake 4: Not Accounting for Drinks
A grande Starbucks latte: ~300 calories. A glass of orange juice: ~110 calories. A post-workout protein shake: 150–300 calories. Drinks are often 300–600 invisible calories per day.
Mistake 5: Using Wrong Database Entries
Food databases have duplicate entries with wildly different calorie counts. "Chicken breast cooked" can range from 130 to 250 per 100g depending on the source. Look for USDA-verified entries when possible.
Mistake 6: Not Accounting for Weekends
Studies show people consistently underestimate weekend calories by 20–35%. If you eat perfectly Monday–Friday but overeat Saturday–Sunday, your weekly average can easily be at maintenance or above.
Mistake 7: Overestimating Calorie Burn From Exercise
Cardio machines overestimate burn by 20–30%. Wearing a heart rate monitor helps, but even those are ±15% accurate. Many people "earn" 400 calories of exercise and eat 600 extra.
Mistake 8: Not Updating Calories as You Lose Weight
A 90kg person has different calorie needs than an 80kg version of themselves. As you lose weight, your TDEE decreases. Recalculate every 5–7kg of weight change.
Mistake 9: Too Short a Tracking Window
Weight fluctuates 1–3kg daily due to water, food in transit, and sodium. Judging "progress" from day to day is meaningless. Track weekly averages over 2–4 weeks to see real trends.
Mistake 10: Forgetting Bites, Licks, and Tastes (BLTs)
A spoonful of peanut butter while cooking (90 calories). A few bites of your kid's pasta (100 calories). Finishing your partner's dessert (150 calories). Research shows BLTs can add 250–500 invisible calories per day.
The Fix
Weigh food. Log everything. Be honest about weekends. Recalculate every few months.
The calorie calculator will give you a starting target — accurate tracking is what takes you the rest of the way.