How to Calculate Your Creatine Dosage
While the standard recommendation of 3-5g per day works for most people, a weight-based calculation can provide a more precise dose tailored to your body. This guide walks you through the calculations for both loading and maintenance phases (RB et al., 2017) .
The Two Calculation Methods
Method 1: Simple Fixed Dose (Most Common)
The simplest approach, recommended by most sports nutrition organisations:
- Maintenance: 3-5g per day
- Loading (optional): 20g per day for 5-7 days
This works for the majority of adults between 50-100kg. If you weigh within this range, there is no need for complex calculations.
Method 2: Weight-Based Calculation (More Precise)
For athletes who want precise dosing or fall outside the typical weight range:
Loading phase formula:
- Dose = Body weight (kg) x 0.3g/kg/day
- Duration: 5-7 days
- Split into 4 equal doses per day
Maintenance phase formula:
- Dose = Body weight (kg) x 0.03 to 0.07g/kg/day
- Duration: Indefinite (continuous daily use)
Step-by-Step Loading Phase Calculation
Let us calculate the loading dose for different body weights:
Step 1: Determine Your Body Weight
Weigh yourself in the morning, after using the bathroom, before eating.
Step 2: Apply the Loading Formula
Multiply your body weight in kilograms by 0.3.
Step 3: Split into 4 Daily Doses
| Body Weight | Daily Loading Dose (0.3g/kg) | Per Dose (4x/day) |
|---|---|---|
| 50 kg | 15g | 3.75g |
| 55 kg | 16.5g | 4.1g |
| 60 kg | 18g | 4.5g |
| 65 kg | 19.5g | 4.9g |
| 70 kg | 21g | 5.25g |
| 75 kg | 22.5g | 5.6g |
| 80 kg | 24g | 6g |
| 85 kg | 25.5g | 6.4g |
| 90 kg | 27g | 6.75g |
| 100 kg | 30g | 7.5g |
Harris et al. (1992) established this loading protocol, demonstrating that it effectively saturates muscle creatine stores within 5-7 days (RC et al., 1992) .
Step-by-Step Maintenance Dose Calculation
Step 1: Use Your Body Weight
Step 2: Choose Your Multiplier
- 0.03g/kg: Lower end — suitable for smaller individuals or those with lower training volume
- 0.05g/kg: Middle — suitable for most recreational athletes
- 0.07g/kg: Upper end — suitable for larger individuals or those with high training demands
Step 3: Calculate
| Body Weight | Low (0.03g/kg) | Mid (0.05g/kg) | High (0.07g/kg) |
|---|---|---|---|
| 50 kg | 1.5g | 2.5g | 3.5g |
| 55 kg | 1.7g | 2.8g | 3.9g |
| 60 kg | 1.8g | 3.0g | 4.2g |
| 65 kg | 2.0g | 3.3g | 4.6g |
| 70 kg | 2.1g | 3.5g | 4.9g |
| 75 kg | 2.3g | 3.8g | 5.3g |
| 80 kg | 2.4g | 4.0g | 5.6g |
| 85 kg | 2.6g | 4.3g | 6.0g |
| 90 kg | 2.7g | 4.5g | 6.3g |
| 100 kg | 3.0g | 5.0g | 7.0g |
For most people, the mid-range calculation (0.05g/kg) aligns with the standard 3-5g/day recommendation (E et al., 1996) .
Adjusting for Lean Body Mass
Since creatine is stored in skeletal muscle (not fat), a more accurate calculation would use lean body mass (LBM) rather than total body weight.
Estimating Lean Body Mass
If you know your body fat percentage:
- LBM = Total body weight x (1 - body fat percentage as decimal)
- Example: 80kg person at 20% body fat = 80 x 0.8 = 64kg LBM
LBM-Based Dosing
Apply a slightly higher multiplier to LBM (since you have removed the fat component):
- Maintenance: LBM (kg) x 0.05-0.08g/kg
- Loading: LBM (kg) x 0.35-0.4g/kg/day
For most practical purposes, total body weight calculations are sufficient. The LBM adjustment provides marginal refinement.
Special Population Dosing
Malaysian Average Body Weight
The average Malaysian adult weighs approximately 60-70kg for men and 50-60kg for women. Based on these averages:
- Average Malaysian man: 3-5g/day maintenance
- Average Malaysian woman: 2.5-4g/day maintenance
Youth Athletes (Ages 13-17)
For younger athletes, use the lower end of the weight-based formula:
- 0.03-0.05g/kg/day for maintenance
- Loading is generally not recommended for teens
Older Adults (60+)
Older adults may benefit from the mid-to-upper range:
- 0.05-0.07g/kg/day for maintenance
- Support for muscle preservation and cognitive function
Practical Measuring Tips
Precise measurement helps ensure consistent dosing:
Using a Scoop
Most creatine products include a scoop. Verify the scoop size:
- A level scoop is typically 3g or 5g (check the label)
- Heaped scoops are inaccurate — always level off
Using a Kitchen Scale
For precise dosing:
- Place a cup or glass on the scale and tare (zero) it
- Add creatine until you reach your target weight
- This method is accurate to within 0.1g
Using a Teaspoon
A level teaspoon of creatine monohydrate weighs approximately 5g. This is the most common household measuring approach.
Using Our Online Calculator
For a quick calculation, try our interactive creatine dosage calculator. Simply enter your body weight, choose your phase (loading or maintenance), and get your personalised dose instantly.
The calculator factors in:
- Body weight
- Loading vs maintenance phase
- Activity level
- Optional body fat percentage adjustment
The Bottom Line
For most people, the standard 3-5g/day of creatine monohydrate is all you need to know. Weight-based calculations (0.03-0.07g/kg/day for maintenance, 0.3g/kg/day for loading) offer slightly more precision for those at the extremes of body weight. The most important factor is not the exact gram amount — it is daily consistency. Whether you take 3g or 5g matters far less than whether you take it every single day.