卡路里计算器
本卡路里计算器根据您的年龄、性别、身高、体重和活动量确定您每天所需的卡路里摄入量。使用经科学验证的 Mifflin-St Jeor 公式，获取减重、维持和增肌的个性化目标。
常见问题
每天应该摄入多少卡路里？
每日热量需求因年龄、性别、身高、体重和活动水平而异。平均而言，成年女性每天需要 1,600-2,400 卡路里，成年男性需要 2,000-3,000 卡路里来维持体重。使用此计算器，基于 Mifflin-St Jeor 方程获取个性化估算，该方程被认为是最准确的热量需求预测公式。
如何计算每日热量需求？
每日热量需求通过先使用 Mifflin-St Jeor 方程计算基础代谢率（BMR），再乘以活动系数来计算。男性：BMR = (10 × 体重 kg) + (6.25 × 身高 cm) - (5 × 年龄) + 5。女性：BMR = (10 × 体重 kg) + (6.25 × 身高 cm) - (5 × 年龄) - 161。然后将 BMR 乘以活动水平（1.2 至 1.9）。
减重需要摄入多少卡路里？
要减重，你需要摄入少于消耗的卡路里。安全可持续的减重速度是每周 1-2 磅，需要在维持水平基础上每日缺口 500-1,000 卡路里。对大多数人来说，这意味着每天摄入 1,200-1,800 卡路里，具体取决于体型和活动水平。未经医疗指导，不要低于每天 1,200 卡路里（女性）或 1,500 卡路里（男性）。
什么是热量亏缺？
热量亏缺是指摄入的热量少于身体一天消耗的热量。身体通过消耗储存的能量（主要是体脂）来弥补差额，从而减重。3,500 卡路里的亏缺大约等于减少一磅脂肪。你可以通过少吃、多运动或两者结合来创造亏缺。对大多数人来说，每天 500 卡路里的适度亏缺是可持续的。
增肌需要摄入多少卡路里？
增肌需要在维持水平基础上每日盈余 250-500 卡路里，同时配合阻力训练。这支持肌肉蛋白质合成，同时最大程度减少脂肪增加。确保蛋白质摄入充足，每磅体重 0.7-1 克。每天 250 卡路里的盈余每周约增重 0.5 磅，是增加瘦肌肉、减少脂肪积累的理想方案。
所有卡路里都一样吗？
虽然所有卡路里提供相同的能量（4.184 千焦），但热量来源对健康、饱腹感和身体成分有重大影响。蛋白质的热效应更高（消化过程中消耗 20-30% 的热量），而碳水化合物（5-10%）和脂肪（0-3%）更低。全食物比加工食品通常更有饱腹感和营养密度。对于体重管理，总热量最重要，但食物质量影响整体健康。
热量计算器有多准确？
热量计算器提供的估算通常与实际需求误差在 10-15% 以内。该计算器使用的 Mifflin-St Jeor 方程是目前最准确的预测公式，但由于遗传、身体成分和代谢差异，个体差异仍然存在。将计算器作为起点，然后跟踪 2-4 周的体重变化，并根据实际结果调整摄入量。
How to Calculate Your Daily Calorie Needs
What is a Calorie Calculator?
A calorie calculator estimates the number of calories you need to consume each day to achieve your weight goals — whether that's losing weight, maintaining your current weight, or gaining weight. It takes into account your Basal Metabolic Rate (BMR), activity level, and personal goals to provide personalized daily calorie targets.
This calculator also generates a zigzag calorie cycling schedule, which varies your daily calorie intake throughout the week while keeping the same weekly total. This approach can help prevent metabolic adaptation and make dieting more sustainable.
How to Use This Calculator
- Choose your unit system (Imperial for lbs/feet or Metric for kg/cm)
- Select your gender
- Enter your age in years
- Enter your height
- Enter your current weight
- Select the activity level that best describes your weekly routine
- Choose your goal: Lose Weight, Maintain, or Gain Weight
- Click "Calculate" to see your personalized results
Formulas Used
This calculator uses the Mifflin-St Jeor equation to estimate your BMR, which is then multiplied by an activity factor to determine your maintenance calories.
Mifflin-St Jeor Equation:
- Male: BMR = 10 × weight(kg) + 6.25 × height(cm) − 5 × age + 5
- Female: BMR = 10 × weight(kg) + 6.25 × height(cm) − 5 × age − 161
Activity Multipliers:
- Sedentary: ×1.2
- Lightly Active: ×1.375
- Moderately Active: ×1.55
- Very Active: ×1.725
- Extra Active: ×1.9
Calorie Adjustments:
- To lose ~0.25 kg/week: subtract 250 calories from maintenance
- To lose ~0.5 kg/week: subtract 500 calories from maintenance
- To lose ~1 kg/week: subtract 1,000 calories from maintenance
- To gain ~0.25 kg/week: add 250 calories to maintenance
- To gain ~0.5 kg/week: add 500 calories to maintenance
A deficit of approximately 7,700 calories is needed to lose 1 kg of body fat. Spreading this over a week gives roughly 1,100 cal/day, but deficits greater than 1,000 cal/day are generally not recommended without medical supervision.
Calculation Examples
Example 1: Weight Loss Goal
A 28-year-old female, 5'6" (167.6 cm), 155 lbs (70.3 kg), lightly active, wanting to lose weight:
- BMR = 10 × 70.3 + 6.25 × 167.6 − 5 × 28 − 161 = 1,410 cal/day
- Maintenance = 1,410 × 1.375 = 1,939 cal/day
- Mild loss: 1,689 cal/day | Moderate loss: 1,439 cal/day
Example 2: Weight Gain Goal
A 22-year-old male, 5'10" (177.8 cm), 150 lbs (68 kg), very active, wanting to gain weight:
- BMR = 10 × 68 + 6.25 × 177.8 − 5 × 22 + 5 = 1,676 cal/day
- Maintenance = 1,676 × 1.725 = 2,891 cal/day
- Mild gain: 3,141 cal/day | Moderate gain: 3,391 cal/day
What is Zigzag Calorie Cycling?
Zigzag calorie cycling (also called calorie shifting) is an eating approach where you vary your daily calorie intake throughout the week while keeping your weekly total the same. Instead of eating the exact same number of calories every day, you eat more on some days and less on others.
The main benefits of zigzag calorie cycling include:
- Prevents metabolic adaptation: Varying calories can help prevent your metabolism from slowing down during a calorie deficit
- Improved adherence: Higher-calorie days can make a diet feel less restrictive and more sustainable
- Aligns with activity: Eating more on workout days provides fuel when you need it most, and less on rest days
- Psychological benefit: Having higher-calorie days to look forward to can improve motivation
This calculator assigns higher calories on Monday, Wednesday, and Friday (typical workout days) and lower calories on rest days, while ensuring the weekly total matches your target.
Use Cases
- Weight Loss Planning: Determine a safe calorie deficit to lose weight steadily without extreme restriction
- Muscle Building: Calculate a calorie surplus to support muscle growth during a bulking phase
- Meal Prep: Use the zigzag schedule to plan meals for the entire week with varied portion sizes
- Plateau Breaking: If your weight loss has stalled, use calorie cycling to overcome metabolic adaptation
- Athletic Performance: Align higher calorie intake with training days and lower intake with recovery days
Tips for Effective Calorie Counting
- Use a food scale to measure portions accurately — estimating can lead to significant errors
- Track everything you eat and drink, including cooking oils, sauces, and beverages
- Do not go below 1,200 cal/day (women) or 1,500 cal/day (men) without medical supervision
- Focus on nutrient-dense foods rather than just calorie numbers for overall health
- Weigh yourself at the same time each day (ideally morning, after bathroom) for consistent tracking
- Adjust your calorie targets every 2-4 weeks based on actual results, since calculators provide estimates
- Stay hydrated — thirst is often confused with hunger, and water supports metabolism
- Be patient: safe, sustainable weight change is typically 0.25-0.5 kg per week