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Health & Fitness · Free Online Tool

Iron Intake Calculator

Determine dietary iron requirements, plant-based 1.8x bioavailability multipliers, and pregnancy-specific hematopoietic needs.

Presets:
Recommended Daily Iron Intake
18 mg/day

Baseline RDA 18 mg/day with 1× dietary absorption adjustment.

Target Iron Intake
18 mg/day
Baseline RDA
18 mg/day
Diet Multiplier
Upper Limit (UL)
45 mg/day

Metric Distribution Analysis

Target Iron Intake 18
Baseline RDA 18
Diet Multiplier 1
Upper Limit (UL) 45

Bioavailability Guidelines

• Omnivore diet provides bioavailable heme iron (15–35% absorption efficiency).

• Co-ingest Vitamin C (ascorbic acid) with meals to triple non-heme iron absorption.

• Separate high-calcium foods, tea, coffee, and red wine by at least 90 minutes from iron-rich meals.

Frequently Asked Questions