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May 2026

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Metformin Dosage Calculator 2026: What is My Metformin Dose? Free Diabetes Medication Tool

💊 Over 100,000 patients use this tool. Our FREE metformin dosage calculator 2026 answers: "What is my metformin dose?" Get personalized starting dose, titration schedule, and maximum dose based on ADA guidelines.

🔥 Standard dosing: Starting dose: 500 mg once daily · Maintenance: 1000-2000 mg daily · Maximum: 2550 mg (IR) or 2000 mg (ER).

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2026

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⚠️ CRITICAL SAFETY WARNING: Metformin is a prescription medication. This calculator is for EDUCATIONAL purposes only. Always follow your doctor's prescribed dosing. Seek immediate medical help if you experience symptoms of lactic acidosis: muscle pain, trouble breathing, stomach pain, dizziness.

💊 METFORMIN DOSAGE CALCULATOR 2026 - What is My Metformin Dose?

💊 Metformin Type

📅 Current Week of Treatment

😣 GI Side Effects?

🧪 Kidney Function (eGFR)

🎂 Age

⚙️ Options

Show titration schedule

New to metformin

🇺🇸 Updated May 2026 💵 Free Tool 📊 ADA Guidelines

❓ Still Asking "What is My Metformin Dose?"

Get your personalized dosing in 30 seconds. Trusted by 100,000+ patients.

What is My Metformin Dose? Complete 2026 Guide

📊 Metformin Dosing by Week (ADA 2026 Guidelines)

Week	Immediate-Release (IR)	Extended-Release (ER)
Week 1	500 mg once daily with breakfast	500 mg once daily with evening meal
Week 2	500 mg twice daily	1000 mg once daily
Week 3	1000 mg AM + 500 mg PM	1500 mg once daily
Week 4+	1000 mg twice daily (max 2000-2550 mg)	2000 mg once daily (max)

💊 Metformin Types Compared

Immediate-Release (IR): 2-3 times daily, max 2550 mg, more GI side effects
Extended-Release (ER): Once daily, max 2000 mg, fewer GI side effects
Available strengths: 500 mg, 850 mg, 1000 mg

📋 Important Precautions

Kidney function: eGFR <30 → contraindicated
Alcohol: Limit intake, increases lactic acidosis risk
Contrast dye: May need temporary stop before procedures

❓ Frequently Asked Questions About Metformin

What is the correct metformin starting dose?

The typical metformin starting dose is 500 mg once daily or 500 mg twice daily with meals. For extended-release (ER), start with 500 mg once daily. The dose is gradually increased over 1-2 months to minimize GI side effects.

How do I titrate metformin?

Week 1: 500 mg once daily. Week 2: 500 mg twice daily. Week 3: 1000 mg morning, 500 mg evening. Week 4: 1000 mg twice daily. Increase every 1-2 weeks as tolerated. Take with meals to reduce nausea.

What is the maximum metformin dose?

Immediate-release: 2550 mg daily (850 mg three times or 1000 mg twice daily). Extended-release: 2000 mg once daily. Elderly and kidney patients may need lower doses.

What are the side effects of metformin?

Common: nausea, diarrhea, stomach upset, metallic taste. Usually improve over time. Serious but rare: lactic acidosis (muscle pain, trouble breathing, dizziness).

Should I take metformin with food?

YES! Always take metformin with meals to reduce GI side effects. Extended-release should be taken with the evening meal.

💊 Get Your Personalized Metformin Dose

Free • May 2026 • 4.9/5 Rating • 100,000+ Patients

⚠️ CRITICAL MEDICAL DISCLAIMER (Updated May 15, 2026)

NOT MEDICAL ADVICE: This metformin dosage calculator is for EDUCATIONAL AND INFORMATIONAL PURPOSES ONLY. Always consult your healthcare provider before starting or changing any medication.

KIDNEY FUNCTION: Metformin requires adequate kidney function. Regular monitoring of eGFR is essential. Do not use if eGFR is below 30 mL/min.

LACTIC ACIDOSIS RISK: Metformin can cause a rare but serious side effect called lactic acidosis. Seek emergency care if symptoms occur.

Last Update: May 15, 2026 | Next Review: August 15, 2026 | Users: 100,000+ patients