Magnesium Needs Calculator Formula
Understand the math behind the magnesium needs calculator. Each variable explained with a worked example.
Formulas Used
Recommended Magnesium
magnesium_rda = rda_mgIntake Gap
magnesium_gap = max(rda_mg - current_intake, 0)Percentage of RDA Met
pct_met = min(current_intake / rda_mg * 100, 100)Variables
| Variable | Description | Default |
|---|---|---|
age | Age(years) | 35 |
current_intake | Estimated Current Intake(mg) | 300 |
rda_mg | Derived value= age <= 3 ? 80 : (age <= 8 ? 130 : (age <= 13 ? 240 : (age <= 18 ? 410 : (age <= 30 ? 400 : 420)))) | calculated |
How It Works
Magnesium RDA
Magnesium supports over 300 enzymatic reactions including energy production, muscle function, and blood sugar regulation.
RDA by Age (Male)
| Age | RDA | |---|---| | 1-3 years | 80 mg | | 4-8 years | 130 mg | | 9-13 years | 240 mg | | 14-18 years | 410 mg | | 19-30 years | 400 mg | | 31+ years | 420 mg |
Worked Example
A 35-year-old currently consuming about 300 mg of magnesium daily.
age = 35current_intake = 300
- 01RDA for male 31+ = 420 mg
- 02Gap = 420 - 300 = 120 mg
- 03Percentage met = 300 / 420 x 100 = 71%
Ready to run the numbers?
Open Magnesium Needs Calculator